4'-Chloro-3,4-Dihydroxybenzophenone: A Close Look at Its Chemistry, Use, and Future Potential

Historical Development

The world of organic chemistry grows richer with every specialized compound that hits the lab bench. Not every substance reaches the same fame as aspirin, but 4'-Chloro-3,4-Dihydroxybenzophenone has carved out a clear spot in niche domains thanks to its molecular structure and reactivity. Decades ago, researchers keen on potent antioxidants and creative intermediates turned their attention to this derivative of benzophenone. It came about at a time when modifying classic benzophenone rings was in full swing—chemists tapped chlorination and hydroxylation not just for curiosity, but for real-world benefits in stability and new functions. Patents in both cosmetics and polymer chemistry have referenced this compound since the late 1900s, pointing to a deeper chemical push behind its development rather than a cosmetic afterthought.

Product Overview

Anyone pulling up a sample of 4'-Chloro-3,4-Dihydroxybenzophenone in a warehouse will recognize it right off—a pale yellow powder with a faint medicinal odor, not the type of thing you’d expect to show up in daily life but crucial behind the scenes in specialty manufacturing. Manufacturers classify it under specialty chemicals, due to the dual hydroxyl groups and the strategic placement of a chlorine atom. This arrangement boosts both its reactivity in synthesis and its stability in end-use applications. The product matters for advanced polymers, certain high-end dyes, and pharmaceutical intermediates.

Physical and Chemical Properties

4'-Chloro-3,4-Dihydroxybenzophenone owns its role thanks to distinct physical and chemical attributes. Chemists see a molecular formula of C13H9ClO3, a melting point hovering near 183–186°C, and limited solubility in water balanced by good solubility in alcohols or ethyl acetate. It resists breakdown under normal environmental conditions, but in strong acid or base it transforms quickly—a reminder that handling this compound means respecting the reactivity of both the phenol and carbonyl groups. Weight-wise, with a molecular weight of 248.66 g/mol, the structure offers enough heft for stable storage and predictable handling during synthesis or blending with other reactants.

Technical Specifications and Labeling

Industry standards call for a purity hitting or exceeding 98%, with impurities like residual solvents or structurally similar isomers kept at tightly monitored levels. Labeling needs to follow both local and international rules: safety pictograms for irritants, UN numbers where required, and chemical identifiers like CAS: 2414-09-3. In my lab days, proper SDS labeling saved new technicians from confusion and kept everyone up to speed with hazard statements. Technical sheets often list melting points, loss on drying, and a full breakdown of spectroscopic data—especially IR, NMR, and mass spectrometry values—since analytical validation matters for further application.

Preparation Method

Production usually starts from a chlorinated benzaldehyde, commonly paired with phloroglucinol in a Friedel–Crafts acylation. Working the reaction requires a Lewis acid catalyst—aluminum chloride stands out. After combining, the mixture stays under controlled temperatures, then filtration cleans up the crude product followed by recrystallization to bring up purity. Quality depends on controlling side reactions and careful removal of unreacted starting material—skipping a purification step leaves behind color-sensitive byproducts that ruin performance in photo-active roles.

Chemical Reactions and Modifications

The dual hydroxyl arrangement gives extra handles for tailored modifications. Chemists perform etherifications, esterifications, and cross-couplings to anchor extra functionality, expanding application potential. The carbonyl group also opens doors—Schiff base formation and reductions produce new families of derivatives. Bringing a chlorine into the mix doesn’t just change solubility; halogenation tweaks electron density, altering reactivity for downstream synthesis or offering direct application in specialty coatings.

Synonyms and Product Names

Depending on the supplier or the patent, the compound shows up as 4'-Chloro-3,4-dihydroxybenzophenone, 4-Chloro-3,4-dihydroxybenzophenone, or simply as a substituted benzophenone. Some catalogues use alternative designations like NSC 21230 or list synonyms that reflect its chloro-dihydroxy core structure. This variety in naming keeps things interesting for procurement or patent searches, but also underscores the importance of verifying CAS numbers to avoid mix-ups.

Safety and Operational Standards

Handling any phenolic compound takes respect for both skin and respiratory health. Contact with 4'-Chloro-3,4-Dihydroxybenzophenone irritates mucous membranes and, with repeated exposure, dries skin. Inhalation of fine dust poses more chronic risks—proper PPE, glove selection, and fume hoods can’t be optional. The chemical doesn’t explode or ignite easily under normal lab conditions, but storage guidelines steer teams away from heat sources, oxidizers, or acids. Disposal lines up with local hazardous organic waste standards. In facilities I worked at, spill training for phenols always ran at the front of the queue, since one error could mean lost productivity and real human health costs.

Application Area

The reach of 4'-Chloro-3,4-Dihydroxybenzophenone jumps from pure chemistry to material science and biochemistry. In polymers, the compound acts as a cross-linking agent for specialty resins, improving mechanical strength and thermal endurance. Color chemists use it to build dyes and pigments responsive to specific light wavelengths. The pharmaceutical sector explores this scaffold in early-stage drug discovery, leveraging both the stable backbone and reactive sites to graft potential pharmacophores. Researchers in cosmetics hunt for new UV absorbers or antioxidants, running comparative studies to classic benzophenones. Each use draws from detailed trials—one veteran in formulation chemistry shared how tweaking just the chlorine position shifted final product stability in sunscreen matrices.

Research and Development

Academic and private sector teams dig deeper into both uses and safety. Material science researchers investigate new polymer blends—using this benzophenone to create smart coatings or responsive films that shift color with environmental cues. Pharma labs expand the synthetic toolkit, using the molecule as a core for targeted anti-inflammatory or antiviral agents. Spectroscopic probes and surface modifiers see regular papers in applied journals, underscoring vibrant interest in fresh applications. From experience in interdisciplinary teams, proven reproducibility and analytical rigor shape publishing prospects: big claims ride on the security of solid data from dozens of coordinated runs.

Toxicity Research

The industry keeps an eye on toxicity, as both phenol and chloroarene structures can cause environmental and human health challenges. Rodent studies suggest moderate oral toxicity—enough to keep it off consumer shelves but manageable with standard chemical hygiene. Ecotoxicity work looks at breakdown pathways: incomplete degradation risks releasing chlorinated intermediates, points that prompt ongoing review by regulatory bodies. Absorption through skin and inhalation both matter in occupational settings, and operators carry the responsibility to minimize chronic exposures. Early findings hint that engineered nanofiltration and advanced oxidation during waste treatment can cut down on environmental impact—a hopeful sign, but still calling for more long-range studies.

Future Prospects

Looking down the road, more labs and manufacturers explore greener synthesis—shift towards less hazardous reagents and push for circular economy pathways that reclaim waste chlorinated aromatics. As regulations tighten around persistent organic pollutants, suppliers and users think ahead to next-generation blends: creating derivatives with the photoprotection of classic benzophenones, minus the ecological baggage. A push for digital modeling of chemical reactivity could speed the cycle from new ideas to practical applications, lowering costs and raising safety standards at every step. My read, after following similar trends: the future of 4'-Chloro-3,4-Dihydroxybenzophenone sits at the intersection of smarter chemistry, responsible stewardship, and the knack researchers have for turning classic compounds into tomorrow’s solutions.

What is 4'-Chloro-3,4-Dihydroxybenzophenone used for?

Where It Shows Up

Walking through any drugstore or browsing cosmetics online, you’ll notice ingredients lists that look more at home in a chemistry textbook. One of those unlikely characters is 4'-Chloro-3,4-Dihydroxybenzophenone. The name doesn’t roll off the tongue, yet it’s made its way into several products that touch daily life. This compound makes itself useful, mostly in the world of sunscreens and some specialty plastics.

How This Compound Protects You

Sunscreens have a demanding job: shield skin from ultraviolet radiation, remain safe for all-day use, and keep formulas stable. 4'-Chloro-3,4-Dihydroxybenzophenone does some heavy lifting here because of its structure. As a benzophenone derivative, it absorbs harmful UV rays, turning them into harmless heat. Anyone who’s spent time under a blazing sun and dodged a sunburn thanks to something smeared on their skin has chemistry like this to thank.

Stability means a lot in sun care. Some sunscreen ingredients degrade when exposed to sunlight, losing their punch after hours at the beach or a long bike ride. This particular chemical stands up to light and heat, sticking around to do its job longer than many alternatives. It also resists breaking down in water, important for swimmers or those caught in a summer cloudburst.

Not Just About Sun Protection

Dig deeper and you’ll find 4'-Chloro-3,4-Dihydroxybenzophenone playing another role. In the plastics industry, it’s used as a stabilizer, especially where sunlight exposure could turn otherwise tough material brittle. Think stadium seats, outdoor playgrounds, or even park benches. Materials treated with this compound aren’t as likely to crack, fade, or weaken with time. Anyone who remembers the disappointment of returning to a playground after one summer to find faded, crumbling slides has seen firsthand why these additives matter.

Safety, Scrutiny, and Progress

Skepticism toward chemicals in personal care isn’t new, and benzophenones often land in the middle of that debate. Scientists have studied the safety of ingredients like 4'-Chloro-3,4-Dihydroxybenzophenone in human skin contact and environmental impacts. In most mainstream formulations, levels are low, and regulatory bodies such as the FDA or the European Commission set precise limits. But concerns don’t disappear—especially with rising reports on water pollution and coral reef harm linked to certain sun-blocking chemicals. Research in environmental science journals has raised red flags about how these substances might linger in water sources, build up in ecosystems, and affect aquatic life over time.

Sectioning off a single chemical from larger issues rarely fixes anything. This is where the responsibility shifts. Brands, researchers, and regulators need to keep innovating safer, effective UV filters and stabilizers. Newer, less persistent alternatives and transparent labeling go a long way toward building trust. Meanwhile, consumers stay informed, scanning ingredient lists and reading up on published research to make choices that work for both people and the planet. Companies that respond to these shifts drive the market toward safer, smarter products—proving that chemistry can keep up with both skin safety and a more sustainable world.

What is the molecular formula of 4'-Chloro-3,4-Dihydroxybenzophenone?

Getting to Know This Molecule

Chemical structure isn’t just for textbooks and lab tests. If you’ve ever used over-the-counter sunscreens or taken certain medications, compounds like 4'-Chloro-3,4-Dihydroxybenzophenone have probably played a role in your life. On paper, this molecule’s story starts with its formula: C13H9ClO3. Each symbol tells a bit about function and how synthetic chemists work. I've seen scientists peer at this cluster of letters and numbers, hunting for clues about reactivity or how it impacts health.

Why Structure Matters

Each atom in C13H9ClO3 serves a purpose. You’ve got 13 carbons, 9 hydrogens, a single chlorine, and three oxygens. Picture a benzophenone backbone, with chlorine tacked on and a pair of hydroxyl (–OH) groups attached. This isn’t some random drawing—this arrangement can influence biological effects, solubility, and even how light gets absorbed. Many people handle products that rely on close cousins to this molecule. Careful chemistry is what keeps those products working safely.

The Real-World Stakes

Making decisions about including a specific molecule in a consumer product goes beyond calculations on paper. Chlorine atoms signal heightened scrutiny. There are well-documented discussions about how chlorinated benzophenones might interact with our bodies and the wider environment. For example, a NASA study highlighted how similar compounds can act as UV filters—useful in stuff like sunscreens. But add chlorine, and these molecules become harder to break down once washed into rivers or oceans. That's not some hypothetical risk. Just ask communities living near water treatment plants, and you’ll hear about persistent compounds building up over time.

Learning from the Science

Early on, organic chemistry lectures hammered home the role of substituents on aromatic rings—like chloride or hydroxy groups in this molecule. A substitution here or there, and suddenly, you’re looking at a compound with entirely new habits. In the lab, just a lone chlorine atom can boost how long a chemical sticks around in the body, or even how the immune system responds to it. Recent reports have tracked these small differences turning up as hidden risks. By 2022, some regulatory bodies started eyeing related benzophenones, nudging companies to consider alternatives that come with less baggage.

What Can Be Done?

There’s no magic switch to flip. Chemists, environmental toxicologists, and product developers need to keep one eye on performance and the other on persistence. Open databases like PubChem or research from the EPA offer up solid evidence—sometimes the nudge that prompts a safer replacement. In my experience, chemists in industry are shifting, using molecules with fewer tricky halogens, even if it comes with a little less stability or sheen in the end product. Thoughtful design beats playing catch-up with regulations years down the line.

Takeaway

The formula for 4'-Chloro-3,4-Dihydroxybenzophenone doesn’t just break down into C13H9ClO3 for the sake of chemistry trivia. Those numbers underpin safety, function, and even environmental legacy. Talking about molecules like this shapes better, safer tech for everyone, and gives clear targets for transparency and responsible design.

Is 4'-Chloro-3,4-Dihydroxybenzophenone hazardous or toxic?

The Concerns Behind the Chemistry

In workplaces and labs, safety shapes decisions. I’ve seen chemists pause before working with something as obscure as 4'-Chloro-3,4-Dihydroxybenzophenone, wondering if the risks go deeper than the safety sheet in the drawer. This compound is better known in technical circles as a building block for specialty polymers and certain UV-absorbing products. Throw those multi-syllable names aside, and the important question remains: does this stuff put people in harm's way?

Studying the Risk

Data on this molecule doesn’t fill up bookshelves. Unlike household names such as benzene or formaldehyde, research barely scratches the surface. What I have noticed from my days in the lab is that benzophenone itself, a well-known relative, doesn’t earn a great reputation. It has shown some evidence for carcinogenicity in animal studies, and it tends to irritate skin and eyes if handled carelessly or spills happen. Chlorinated derivatives often come up in conversations about toxicity since chlorine atoms can make a seemingly harmless material much more problematic.

That leads to the next step: checking reputable sources. The European Chemicals Agency lists 4'-Chloro-3,4-Dihydroxybenzophenone as a chemical requiring careful attention. Some material safety data sheets flag skin and eye irritation risks. Breathing in dust could irritate the nose and throat. Long-term exposure studies are few, but it’s safe to say that researchers treat the stuff like many benzophenone cousins, with gloves and goggles, and never as a casual ingredient.

Thinking About the Bigger Picture

Any time I worked with molecules like this, proper ventilation made all the difference. I never trusted a closed bottle in a poorly ventilated room. Prompt cleanup, prompt reporting—these habits protected not just me, but everyone around. Everyone wants to skip protocol until the day something splashes, and once that happens, eyes sting and panic spreads. Stories like these have taught me that the chemical’s lack of mass-market presence doesn’t mean it deserves less respect.

Solutions and Safer Practice

Companies and labs could push for even better handling guidelines. Not every safety data sheet matches the real hazards, especially with lesser-known molecules. A more open, shared chemical risk database would have helped in my early days handling new compounds. Cold hard facts—LD50 data, chronic exposure studies, environmental persistence—should not hide behind paywalls or company firewalls.

Better worker training goes a long way. People handle thousands of compounds without a thought, yet persistent education about glove types, goggles, spill kits, and first-aid response reduces harm. Tech advances like closed-loop handling systems and automated weighing reduce accidental contact. Making PPE available at every station signals a culture of care that cuts down on risk-taking.

Research transparency matters, too. Academic labs need incentives to publish negative or ambiguous toxicity findings. Industry should share what they know. We don’t need another decade discovering hazards too late, repeating well-worn stories of overlooked risks.

Why All This Still Matters

Even if few people touch 4'-Chloro-3,4-Dihydroxybenzophenone directly, what we learn from its risks applies to thousands of similar compounds. Routine respect for all chemical hazards, clear communication, and a willingness to update safety knowledge impact everyone down the line. Today, there’s plenty more to learn about this compound, but history says never assume a quiet chemical poses no threat, no matter how niche it seems.

How should 4'-Chloro-3,4-Dihydroxybenzophenone be stored?

Understanding What You’re Dealing With

4'-Chloro-3,4-Dihydroxybenzophenone sounds like a mouthful, but it’s really just one of those specialized chemicals popping up in labs that focus on pharmaceuticals or advanced polymer research. This compound isn’t exactly something you’ll find lying around in everyday settings, and having spent years working with similar aromatic chemicals, I’ve seen plenty go wrong when folks treat storage as an afterthought. Neglecting the details creates headaches: spoiled batches, health hazards, and even regulatory trouble if things spill or degrade. Storing this chemical safely protects both people and results.

Protecting Workers and Materials

Here’s what my experience (and credible safety resources like Sigma-Aldrich’s datasheets) says: you want to keep this chemical far away from heat, sunlight, and sources of ignition. These are all key players in chemical breakdown. Even with supposed “stable” benzophenones, a little too much warmth or UV can kickstart reactions you never intended.

Gloved hands and eyeshields come out before even opening the container, because skin absorption and accidental splashes have real consequences. Powders cling and spread, and the subtle dust can irritate more than you think—one time, a barely-noticed dusting of a similar phenolic left a coworker with a racing pulse and bloodshot eyes. Nobody enjoys an impromptu trip to the eyewash station or an ER visit.

Best Practices: Not Just by the Book

A walk through any reputable lab will show you rows of tightly-sealed containers, clearly labeled, stashed on shelves that sit at shoulder height or below. With 4'-Chloro-3,4-Dihydroxybenzophenone, I reach for amber glass containers—these block out light and keep the stuff fresher for longer. Polyethylene and polypropylene work too, but glass just feels safer, especially with something you don’t want leaching into plastics.

Forget about improvising with cabinets made for cleaning supplies or mixing chemicals from different storage groups. This compound plays best with other organic solids, tucked away far from oxidizers, acids, and bases. If you’ve ever dealt with stubborn chemical stains or mystery fumes, you learn to respect the danger of mixing storage. The compound may not be wildly unstable, but surprises only go one way: toward ruined samples or worse.

Humidity is a Hidden Enemy

Phenolic chemicals can draw moisture from the air, clumping up or undergoing subtle changes that mess with purity. I keep a jar or two of silica gel in the cabinet to keep humidity in check. If you store in the fridge as some protocols recommend, give chemicals time to warm up before opening—otherwise you wind up with condensation on the inside and a chunk of unusable goo.

Eyes Wide Open

Safety isn’t a box to check; it’s a habit. I encourage regular checks on labels for dates and condition. If there’s any doubt about the appearance, I don’t take chances. Disposal happens through hazardous waste procedures, not down the drain or trash. I’ve seen too many cases where small lapses turned into preventable emergencies—all for want of a little extra vigilance.

Following these simple steps lets science move forward without unnecessary risk. As I’ve found, treat chemicals with respect, and they’ll pull their weight in any project.

What are the solubility properties of 4'-Chloro-3,4-Dihydroxybenzophenone?

Looking at a Real-World Molecule

4'-Chloro-3,4-Dihydroxybenzophenone isn’t just another tough chemical name tossed around by chemists. For anyone who's worked in a research lab or dealt with quality testing, it’s a solid reminder that the little quirks of a molecule matter more than they let on. I've seen grad students hit a wall with compounds like this—especially when they're trying to get the stuff to dissolve for assays, chromatography, or formulation. 

Water Solubility: Not Easy Going

This compound pushes back when you drop it in water. Two hydroxyl groups bring some polarity, which you’d think might boost water compatibility. But the chlorine atom and the rest of the phenyl structure tip it towards lipophilicity. Benchwork proves it: dump a bit into distilled water and you’ll notice stubborn clumps at the bottom even after some serious stirring. Typical water solubility stays far below a milligram per milliliter. That’s a common bottleneck in drug discovery or product formulation, where you want to keep everything in solution.

Organic Solvents: Better Results

Switching to ethanol or methanol changes things. Compounds with phenolic groups and some electron-withdrawing punch like chlorine usually play nicely with these solvents. I’ve worked with similar benzophenone derivatives, and dissolving them in methanol at room temperature—especially with mild heating—brought out much clearer solutions. Dichloromethane and dimethyl sulfoxide (DMSO) take on pretty high concentrations. With DMSO, I've reached multi-gram levels per 100 mL without trouble. The wide use of DMSO in screening is no accident; it's almost a magic solvent when a molecule just won’t play ball elsewhere.

Why Solubility Matters in Practice

Solubility isn’t some abstract number locked away in a reference book. It shapes everything from productivity in a lab to real-world impact on product development. If you work on pharmaceuticals or cosmetics, solubility issues force you to rethink your delivery method or switch your ingredient list. In analytics, poor solubility turns a straightforward HPLC analysis into a mess of precipitation, poor recovery, and clogged columns. Sometimes teams burn months trying to coax tricky compounds into solution with solvent blends, surfactants, or heat, only to watch results slide back to square one at scale.

Finding a Path Forward

Getting workable solutions often calls for compromise. Using mixed solvents—like ethanol-water blends or adding a dash of acetonitrile—has helped get this and related compounds into testable form without harming downstream analysis. Adjusting pH with sodium hydroxide or buffer salts sometimes bumps up solubility by ionizing those hydroxyl groups, though you pay for that with possible instability or new impurities. In formulation work, using cyclodextrins or similar carriers can encapsulate hydrophobic molecules and sneak them into water-based media. This isn’t just academic: over the years, product teams and scientists dealing with molecules of this sort have found creative, practical solutions drawn from hard-won experience rather than any magic recipe.

Balancing Performance and Usability

No one likes fighting with a stubborn compound to get data, make a stable dosage form, or pass a quality benchmark. Clearing the hurdle with solubility, though, means everything else—stability, measurement, biological tested—can move forward. The nitty-gritty solubility properties of 4'-Chloro-3,4-Dihydroxybenzophenone end up steering the direction for real-world products and lab routines. That lesson sticks with you after enough runs at the bench and rounds of trial and error.