© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Scientists have searched for stable and bioavailable forms of vitamin C for decades. L-ascorbic acid, the classic form, suffered from oxidation and poor skin penetration, something that frustrated both researchers and manufacturers. Lab work in the late 20th century led to the synthesis of ascorbyl tetraisopalmitate, an oil-soluble derivative crafted so the molecule could resist breakdown and get past the skin’s oily barrier much easier. Industry interest soared after initial stability tests outpaced earlier esters like ascorbyl palmitate. By the early 1990s, Japanese chemists and cosmetic formulators drove advances, recognizing the value of pairing the antioxidant effects of vitamin C with the compatibility of a lipid-soluble vehicle. This molecule started cropping up in high-end beauty products across Asia and Europe, eventually crossing into North American shelves as demand for anti-aging and brightening formulations exploded.
Manufacturers isolate ascorbyl tetraisopalmitate as a colorless to pale yellow, almost odorless oil. It gets used in a wide range of topical skincare and cosmetic products, favored for its superior skin absorption and resistance to oxidation compared with plain ascorbic acid. This derivative doesn’t sting or irritate sensitive skin as easily, so it lands in both serums and creams aimed at hydration, protection against environmental stress, and reduction of hyperpigmentation. Suppliers package it in light-resistant bottles, sometimes alongside other antioxidants or emollients, to prolong effectiveness and appeal to a market that values visible results and gentle action.
Chemically, ascorbyl tetraisopalmitate carries a C70H128O10 formula, with a molecular weight around 1129.8 g/mol. The structure anchors isopalmitic acid chains to the ascorbic acid core through esterification, granting its signature oil solubility. Its physical form—clear to faint yellow oil—shows solid purity, with a refractive index close to 1.46, making it an easy blend into many oils and silicone bases. Water barely mixes with it, but it dissolves in commonly used cosmetic oils. Unlike vitamin C solutions, it holds up well under standard storage conditions, no matter if it faces air or daylight, largely dodging the browning and potency loss that plagues water-based serums.
Regulatory authorities tolerate ascorbyl tetraisopalmitate concentrations up to 10% in finished skincare. Formulators often use it in the 1-5% range, balancing performance with sensory feel and cost. Packaging labels feature names like “tetrahexyldecyl ascorbate” or recognized INCI nomenclature “Ascorbyl Tetraisopalmitate.” Some products will tout its vitamin C activity or emphasize “oil-soluble vitamin C” to catch consumer attention. Regulatory filings in the United States, Japan, and the EU recognize it as safe and stable when used under cosmetic guidelines, so it appears in ingredient listings by its standardized nomenclature in both luxury and mid-tier product lines.
Labs use a straightforward reaction: they combine L-ascorbic acid with isopalmitic acid in the presence of catalysts, often using an acid chloride intermediate like palmitoyl chloride and an organic base. This esterification process takes place under careful temperature and solvent control, keeping ascorbic acid from degrading during synthesis. Purification follows, involving solvent extraction and sometimes distillation, depending on the supplier’s purity standards. Large-scale production leans on batch reactors to ensure each lot matches potency, while eco-friendly initiatives have spurred research into green solvents and enzymatic esterification to reduce waste and energy consumption.
Ascorbyl tetraisopalmitate enters chemical reactions predictable for esters. In the skin, natural enzymes break its ester bonds, gradually releasing active vitamin C and isopalmitic acid. Chemists can create analogs by swapping out the fatty acids, or by attaching antioxidant boosters to further shield the vitamin C backbone from oxidation. Some research looks into mixing it with lipophilic vitamin E or ferulic acid to craft synergistic effects, banking on antioxidant “recycling” to enhance performance in sun protection or brightening formulas. Those pursuing innovative modifications study molecular encapsulation or controlled-release systems, hoping to fine-tune bioavailability and minimize irritation.
In international supply chains or regulatory assessments, the molecule appears under various names. “Tetrahexyldecyl Ascorbate” and “Ascorbyl Tetra-2-Hexyldecanoate” crop up on documentation, sometimes causing confusion among buyers. Finished products often highlight it as a premium ingredient—“Vitamin C Ester,” “Oil-Soluble Vitamin C,” or “Advanced Antioxidant Complex”—hoping to duck the baggage of acidic vitamin C, which many consumers associate with stinging or orange stains on packaging. The Japanese chemical industry often refers to it by product numbers or code designations, while INCI listings tend to dominate European and North American ingredient labels.
Safety studies confirm ascorbyl tetraisopalmitate has low irritation and sensitization risk when used as directed. Regulatory bodies in the US, Europe, and Asia cite comprehensive toxicology data examining acute dermal, ocular, and long-term exposures, concluding there’s little risk of mutagenicity or systemic toxicity. Manufacturing environments handle it as a non-hazardous oil, though standard industrial hygiene applies: gloves, goggles, and proper ventilation keep operators safe from spills or airborne oils. On the shelf, finished products require minimal safety warnings beyond avoiding contact with eyes or broken skin. Brands rely on lot tracking, quality checks, and stability testing to make sure every bottle delivers on both safety and promised benefits.
You won’t just find ascorbyl tetraisopalmitate in the world of anti-aging serums. Its dermal absorption benefits have made it valuable in brightening creams, sunscreens, post-procedure balms, and oil-based makeup primers. Dermatologists notice its role in reducing melanin synthesis and fading sun-induced dark spots, linking its benefits not only to cosmetic brightening but to protection against pollution and UV-driven free radical damage. Some skincare lines target men or postmenopausal skin with higher levels, arguing that oil-rich formulas surpass watery, acidic serums for comfort and barrier repair. With the global wellness trend, formulators keep testing its limits—mixing it into balms, lip oils, and even scalp treatments targeting oxidative stress linked with hair thinning.
Lab investigations have probed how ascorbyl tetraisopalmitate can outlast standard vitamin C under stress conditions—high heat, light, and exposure to oxygen—all while restoring depleted vitamin E in skin models, supporting barrier recovery, and brightening uneven tone. Some published studies compare penetration of this ester to ascorbic acid, linking its lipid chains to better movement through the stratum corneum in both porcine and human skin explant models. These projects not only advance industry knowledge but prompt regulatory agencies to expand approved uses. Academic labs are now looking beyond beauty, measuring its antioxidant capacity in wound healing and its ability to curb inflammation in acne-prone skin. Researchers also test it alongside retinoids, exploiting its mildness and compatibility to craft next-generation anti-aging treatments with fewer side effects.
Published animal and human patch studies reveal ascorbyl tetraisopalmitate rarely triggers irritation, even on compromised or freshly shaved skin. Repeat application can increase skin hydration and natural moisture barrier proteins, meaning long-term use could offer more benefit than risk. No evidence of carcinogenic activity has emerged, and metabolism studies show enzyme-driven breakdown into trusted building blocks: vitamin C and palmitic acid, both familiar to the skin’s biochemistry. Regulatory reviews scrutinize every phase, from raw synthesis to finished product, looking for allergenic impurities, residual solvents, or heavy metal contaminants. Reassurance comes from the fact that global regulatory agencies have never had to recall this ingredient on toxicity grounds, a rare claim among many synthetic actives circulating in the skincare world.
Innovation keeps racing ahead, pushing ascorbyl tetraisopalmitate into new territory. R&D teams want to tweak its structure for ultra-fast penetration or create encapsulated forms that release vitamin C in sync with circadian skin rhythms. With predictive analytics and machine learning fueling raw material sourcing and formula optimization, markets forecast double-digit annual growth rates for this ingredient. Sustainability concerns drive some producers to seek out renewable fatty acid sources, aligning with organic and vegan brand promises. Medical research explores its role in topical drug delivery, looking to shuttle not just vitamin C but hydrophobic medications through tough skin barriers. Companies that solve challenges around cost, purity, and green manufacturing will likely set new standards, unlocking more global market share for this versatile, proven molecule.
Ascorbyl tetraisopalmitate, a fat-soluble vitamin C derivative, has started showing up in many skincare products promising brighter, healthier skin. Unlike ascorbic acid, the classic water-based vitamin C, this form mixes with oils and slips deeper into the skin’s layers. It dodges some of the common pitfalls of vitamin C, like fast breakdown and irritation. This creates a tool for people with sensitive or dry skin who want the benefits of vitamin C but either got tired of red patches or could not use most creams.
There’s a noticeable shift toward gentle but deeply effective ingredients in skincare. Ascorbyl tetraisopalmitate stands out because skin absorbs it without the usual stinging sensation. I’ve seen countless friends skip vitamin C serums because of burning or sticky formulas. It’s rare to meet folks who love their morning routine burning their cheeks, so products that leave out irritation help build daily habits.
Fat-soluble vitamin C doesn’t break down as fast in light and air, which keeps the ingredient stable longer. There’s real value here, as nobody enjoys shelling out for a bottle that’s already lost half its punch before it even makes it onto their shelf. With this vitamin C, chances go up that people get the full effect of the ingredient they paid for. In practice, I’ve watched bottles last longer, with less color shift or odd smells that often warn you a serum has turned.
Since this form loves oils, it moves past the outer layer and drops vitamin C right where skin can use it most. Skin uses vitamin C to make collagen, the protein that built my grandma’s famously smooth cheeks and my own, at least before I picked up too many sunburns. Collagen helps skin spring back, looking fuller and feeling smooth. Vitamin C also helps block out pollution damage and lightens up dark marks left behind by breakouts or too many sunny afternoons.
Some folks raise good questions about bioavailability—whether skin turns fat-soluble vitamin C into active ascorbic acid once it's inside. Researchers like those at the Journal of Dermatological Science have seen after applying ascorbyl tetraisopalmitate, skin cells ramp up collagen and cut down on pigment. No one is calling it a miracle, but the numbers look persuasive for anyone hoping for more even-toned, firmer skin with less irritation.
People want results without fuss, and that’s the root of ascorbyl tetraisopalmitate’s rise. It fits into oil serums, lotions, and even some eye creams. This flexibility helps brands craft formulas for dry or mature skin, and the ingredient works quietly throughout the day. Pairing it with sunscreen ramps up the fight against sun spots. Since oil-based vitamin C doesn’t clash with other ingredients as easily as water-based forms, people can layer it with retinol or niacinamide.
For those skeptical of trends, the ingredient’s track record supports its popularity. It rarely causes breakouts and makes it easier for more skin types—especially those prone to redness or sensitivity—to chase healthier and clearer skin. I’ve watched friends with eczema or rosacea feel confident testing consistent vitamin C routines for the first time, and in many cases, they’ve stuck with it.
Understanding what sets ascorbyl tetraisopalmitate apart helps consumers make smarter decisions for their skin. People armed with real information—about why a stable, gentle vitamin C matters—can see through inflated promises and pick products that genuinely support long-term skin health. This kind of knowledge tilts the market toward safer, more effective solutions, and lets everyone take realistic steps toward looking and feeling their best.
You often hear about vitamin C in skincare. L-ascorbic acid gets most of the attention, but Ascorbyl Tetraisopalmitate offers a unique twist: it dissolves in oil. This means your moisturizer or serum absorbs it without the tingling or burning folks sometimes get with pure vitamin C. Dermatologists consider it a stable option. You can leave it out on your counter, and it sticks around, unlike older vitamin C versions that oxidize quickly and lose their punch.
Anyone with sensitive skin knows the struggle of picking new products. I remember trying a vitamin C serum that left my cheeks stinging and red after only two uses. That kind of reaction happens because many forms of vitamin C are acidic. Ascorbyl Tetraisopalmitate skips most of that irritation since it is less acidic and blends well with oils found in skin. That gentle approach draws people with reactive skin.
Researchers have studied how skin cells respond to Ascorbyl Tetraisopalmitate. This form gets inside deeper layers of skin because skin loves oils. Once inside, it turns into ascorbic acid and supports collagen development without setting off alarms for most people prone to redness or dryness. Some studies show a visible improvement in skin clarity and fewer dark spots, even among those who flinch at new ingredients.
Not every option works for every face, though. Some brands pack vitamin C products with fragrance or essential oils. Sensitive skin balks at anything extra. I made a habit of reading ingredient lists and searching out fragrance-free serums. Another key is the concentration: formulas with 3%-7% Ascorbyl Tetraisopalmitate typically get the green light for comfort based on reports from users and cosmetic chemists. Going above that line makes reactions more likely.
Over the past decade, contact dermatitis rates from skincare have climbed. Rough winter air, over-exfoliation, and harsh actives don’t help. A report from the American Academy of Dermatology suggests that a third of adults label their skin as sensitive—so finding alternatives that keep the benefits without fallout stands out. Ascorbyl Tetraisopalmitate, thanks to its oil base and lower irritation history, fits this moment. People with rosacea and eczema often share their positive experiences using serums with this ingredient. Still, patch testing saves headaches down the road. Dab a dot behind your ear and wait a day before slathering your cheeks.
Starting a new routine doesn’t need to feel risky. Pick simple formulas with fewer extras, favor brands that test for irritants, and keep an eye out for clinical trials or studies backing up the claims. Dermatologists appreciate ingredients that pass safety checks on all kinds of skin tones and textures. Personal experience lines up with that advice—it pays to move slowly and let your skin adjust before mixing in acids or exfoliants.
Ascorbyl Tetraisopalmitate offers hope for people who have all but given up on vitamin C. The gentle, oil-based approach feels less risky for skin that speaks up at the smallest change. If you keep your routine simple and pay attention to how your skin feels, you stand a good chance of enjoying the glow-up without the sting.
Ascorbyl Tetraisopalmitate shows up in more skincare lines for a good reason. It takes Vitamin C and connects it to a fat-soluble base, which sets it apart from that familiar stingy ascorbic acid. I find this version gentle enough not to set off irritation. The science backs that up—several peer-reviewed journals mention this form penetrates deeper into the skin layers, increasing its conversion to active vitamin C inside skin cells. That means it packs a punch for fading dark spots, boosting glow, and fighting UV-induced damage without the usual redness or dryness.
I get asked a lot about layering products. With Ascorbyl Tetraisopalmitate, I start after cleansing and toning but before heavier creams. Products like serums and facial oils carry this ingredient well, so I drop a few drops in the palm, press it into the face, and let it soak in. Sometimes I follow it with a plain moisturizer, but on humid days, I skip straight to sunscreen right after, since this vitamin C type pairs well with SPF. I learned quickly not to overdo it: twice a day feels good for some, but for those trying it for the first time, once in the morning usually gets results without tipping into irritation.
A close look at ingredient lists matters. Ascorbyl Tetraisopalmitate should sit up high, not buried at the end of the product label. Brands often market “brightening” blends with a hint of this ingredient, but that won’t give the benefits seen in clinical studies. The base of the product matters too. Since this form is fat-soluble, a lightweight oil or creamy serum tends to make the most of its absorption. I skip anything packed with essential oils, since that can offset the gentleness people look for with this ingredient.
My friends with sensitive or acne-prone skin still watch closely for breakouts from new oils in their routine. While Ascorbyl Tetraisopalmitate tends to avoid that burning sensation, occlusive oils sometimes cause clogged pores. For anyone with a history of malassezia or fungal acne, I recommend checking the base oil against trusted lists. Dermatologists have pointed out that this form of vitamin C won’t cause the same irritation as pure ascorbic acid, but nothing suits everyone. I always patch-test on the underside of my jaw and wait at least a day.
Brands can ask a high price for Ascorbyl Tetraisopalmitate serums, but not all products deliver what they promise. I look for clear, airtight packaging, since sunlight or oxygen breaks down the compound over time. A price tag above the drugstore vitamin C doesn’t always translate to better outcomes. Reviews by dermatologists and skincare chemists often point to mid-range options doing the job just as well as prestige lines, as long as the concentration sits between 3% and 10%.
If you use vitamin C mostly for sun protection backup, keep applying broad spectrum sunscreen daily. No antioxidant serum replaces the real workhorses of sun safety. With consistent use, most people notice firmer skin and brighter tone in six to eight weeks. If dryness or redness pops up, switching to fewer applications often smooths things out. Above all, adjust as your skin talks back—some mornings it calls out for plain moisture, other days, that glowing boost from Ascorbyl Tetraisopalmitate fits right in.
Ascorbyl Tetraisopalmitate appears on labels of face oils, serums, and creams promising brighter, smoother skin. It shows up because chemists figured out how to attach fat-loving molecules to vitamin C, letting it blend into skincare formulas without going bad so quickly. More brands launch products with it every year, driven by the search for stable and effective vitamin C.
Some people notice their skin burns, tingles, or turns red after using a serum with Ascorbyl Tetraisopalmitate. Every dermatologist I’ve spoken to sees about the same complaints for new vitamin C products during office visits. I tried a serum containing this ingredient at one point. After a few days, tiny bumps showed up along my jaw. I decided to pause and watch the skin fade back to normal. Anyone switching in Ascorbyl Tetraisopalmitate without patch testing first might see similar flares: sometimes it’s stinging at the first use, sometimes breakouts pop up after weeks. For sensitive skin, this risk of unexpected reactions is not just theory; it shows up on forums and in clinics.
Plenty of people believe that oil-soluble vitamin C forms like Ascorbyl Tetraisopalmitate promise less irritation than older ascorbic acid formulas. The catch: side effects still happen. Reports from Korea and Japan in dermatology journals describe rare cases of contact dermatitis, especially where people use a product daily for months. Even one bad patch of rash can discourage someone from trying another product for years. Kids should never use it without a healthcare provider’s advice, considering their thinner skin and unpredictable reactions.
Using too much, too often, or with harsh exfoliants increases problems. At strong concentrations and with repeated applications, Ascorbyl Tetraisopalmitate may strip the skin’s barrier. The skin looks dehydrated, tight, or peely. One friend ignored the instructions and doubled up on serums hoping for faster brightening. She spent two weeks nursing flaky patches that needed aloe vera more than vitamin C. Mixing this oil-soluble form with retinoids or acids—without guidance—ramps up those risks.
Every person brings a different genetic and environmental history to their skincare. Someone with allergies to plant oils, surfactants, or fragrance blends in a given product can react, even if the Ascorbyl Tetraisopalmitate alone would have been fine. Checking the full ingredient deck matters more than marketing promises. That habit makes a difference, especially if you have a record of eczema or reactive skin.
If side effects crop up, pausing the product and checking with a board-certified dermatologist keeps matters simple. Patch test new skincare on the wrist or behind the ear. Avoid mixing multiple active ingredients unless a professional guides your routine. People with persistent irritation can try reducing frequency, using fragrance-free, lightweight formulas, and steering clear of harsh cleansers.
Manufacturers carry a responsibility here. Clear labeling, simple ingredient lists, and honest info about concentrations help customers make better choices. Shoppers benefit from evidence-based advice and reviews—not just hype around a trendy form of vitamin C.
Ascorbyl Tetraisopalmitate draws a loyal crowd in the skincare space because it offers a stable, oil-soluble way to get Vitamin C benefits. Unlike pure ascorbic acid, it glides smoothly into oils and creams, dodging the irritation and instability that trouble other types. I've seen a mix of clients turn to it: some with sensitive skin, others just fed up with the stinging and poor shelf life of other Vitamin C options. It helps brighten dull complexions, supports collagen, and offers antioxidant protection—attributes I value in my own morning routine.
Plenty of people want to double down, mixing actives like retinol, niacinamide, or acids with Ascorbyl Tetraisopalmitate. Questions around safety pop up everywhere. The good news: this molecule doesn’t get fussy. I've patched together my own blends, and seen brands combine it with retinol or peptides without sparking problems. Because it's non-water based, it stands up alongside vitamin E, squalane, or ferulic acid, boosting its own antioxidant chops. Clinical research also supports these pairings, showing added stability in formulas that keep skin calm and hydrated.
Mixing strong exfoliants—glycolic or lactic acid, for example—raises more questions. From experience, stacking multiple actives in one routine often tips skin over the edge. Overloading can mean unwanted redness, or that greasy, congested feeling. Dermatologist colleagues have said that layering a powerful acid with an oil-based vitamin C like this can throw off your skin barrier if you’re not careful. Patch testing new combinations before slathering them on every morning or night makes a difference, especially for people already dealing with sensitivity or breakouts.
Application order does matter. Applying light, water-based serums before richer, oil-based treatments like Ascorbyl Tetraisopalmitate helps absorption. That said, sometimes less is more. In my routine, if I’m using retinol, I keep active vitamin C for daytime use. Separating actives (one in the morning, one in the evening) balances results and gives your skin time to adjust. Research from the Journal of Cosmetic Dermatology lines up with my own experience: thoughtful layering cuts down on irritation while still delivering benefits.
Keeping an eye on product lists means fewer surprises. Some brands throw everything in the mix—acids, vitamins, plant oils—which can make it hard to pin down what’s working. I always recommend looking for simple, clearly labeled combinations. Peer-reviewed studies in the International Journal of Cosmetic Science highlight that fewer, well-matched ingredients can outperform cluttered formulas, especially for those with sensitive or reactive skin.
Companies can help by breaking down which active combos they’ve tested together and explaining what to expect. More brands now share stability testing and side-effect data, letting people pick products with confidence. As more home users mix their routines, I see real benefit in ongoing education—clear instructions and honest communication between brands, dermatologists, and consumers. For me, the best step has always been listening to my own skin. If something feels off, I dial it back and keep routines simple enough to tell what’s making a difference.
| Names | |
| Preferred IUPAC name | 6-O-palmitoyl-2-O-palmitoyl-3-O-palmitoyl-L-ascorbic acid 5-O-palmitate |
| Other names |
Tetrahexyldecyl Ascorbate Ascorbyl Tetra-2-Hexyldecanoate Vitamin C Tetraisopalmitate |
| Pronunciation | /ə-ˈskɔːr-bɪl tɛt-raɪ-ˌsoʊ-pæl-ˈmɪ-teɪt/ |
| Identifiers | |
| CAS Number | 183476-82-6 |
| Beilstein Reference | Beilstein Reference: 3907453 |
| ChEBI | CHEBI:60756 |
| ChEMBL | CHEMBL2105959 |
| ChemSpider | 21142235 |
| DrugBank | DB11269 |
| ECHA InfoCard | 03e1cd2a-7cd3-4296-960a-1d03f37f6c81 |
| EC Number | 222-311-2 |
| Gmelin Reference | 1137019 |
| KEGG | C15602 |
| MeSH | D000077271 |
| PubChem CID | 5318207 |
| RTECS number | TY3150000 |
| UNII | 7Z6E6J977T |
| UN number | UN3077 |
| CompTox Dashboard (EPA) | DTXSID4036795 |
| Properties | |
| Chemical formula | C70H128O10 |
| Molar mass | 1129.93 g/mol |
| Appearance | Clear, viscous, pale yellow liquid |
| Odor | Odorless |
| Density | 0.945 g/cm³ |
| Solubility in water | Insoluble |
| log P | 11.6 |
| Vapor pressure | < 0.00001 hPa at 20 °C |
| Acidity (pKa) | >10 |
| Basicity (pKb) | pKb: 15.51 |
| Magnetic susceptibility (χ) | -8.0E-6 cm³/mol |
| Refractive index (nD) | 1.463 – 1.475 |
| Viscosity | Viscous liquid |
| Dipole moment | 7.9 Debye |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 358.5 J·mol⁻¹·K⁻¹ |
| Pharmacology | |
| ATC code | A11GA01 |
| Hazards | |
| Main hazards | Causes serious eye irritation. |
| GHS labelling | GHS07, GHS09 |
| Pictograms | GHS07,GHS09 |
| Signal word | No signal word |
| Hazard statements | No hazard statements. |
| Precautionary statements | P264, P270, P273, P280, P301+P312, P305+P351+P338, P330, P501 |
| NFPA 704 (fire diamond) | Health: 1, Flammability: 1, Instability: 0, Special: - |
| Flash point | 145°C |
| Autoignition temperature | 300°C |
| LD50 (median dose) | LD50 (median dose): >2000 mg/kg (rat, oral) |
| PEL (Permissible) | Not Established |
| REL (Recommended) | 0.1–2% |
| IDLH (Immediate danger) | Not established |
| Related compounds | |
| Related compounds |
Ascorbic acid Magnesium ascorbyl phosphate Sodium ascorbyl phosphate Ascorbyl palmitate Tetrahexyldecyl ascorbate Ethyl ascorbic acid |
