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HS Code |
656663 |
| ChemicalName | 2,3-Dimethylheptane |
| CASNumber | 3074-69-7 |
| MolecularFormula | C9H20 |
| MolarMass | 128.26 g/mol |
| Appearance | Colorless liquid |
| BoilingPoint | 144-146 °C |
| MeltingPoint | -83 °C |
| Density | 0.718 g/cm³ |
| RefractiveIndex | 1.401 |
| FlashPoint | 24 °C |
| SolubilityInWater | Insoluble |
| VaporPressure | 14 mmHg (20 °C) |
| Structure | Branched alkane |
| Odor | Gasoline-like |
| Synonyms | Heptane, 2,3-dimethyl- |
As an accredited 2,3-Dimethylheptane factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The packaging for 2,3-Dimethylheptane (100 mL) is a clear, amber glass bottle with secure cap and safety labeling. |
| Shipping | 2,3-Dimethylheptane is typically shipped in tightly sealed, properly labeled containers suitable for organic solvents, protected from sources of ignition and extreme temperatures. Transport is conducted in accordance with local, national, and international regulations, such as DOT and IATA, to ensure safe handling and compliance during transit. |
| Storage | 2,3-Dimethylheptane should be stored in a cool, dry, and well-ventilated area away from sources of ignition, heat, and direct sunlight. Keep the container tightly closed and properly labeled. Avoid storing with strong oxidizing agents. Use approved safety containers, and ensure spill containment measures are in place. Store in compliance with applicable local and national regulations for flammable liquids. |
Applications of 2,3-Dimethylheptane in Industrial Manufacturing2,3-Dimethylheptane serves as a specialized branched-chain alkane for several targeted industrial uses. Our production delivers consistent purity and batch-to-batch uniformity for formulators and downstream manufacturers. Below, we detail the key utilization scenarios, demonstrating real integration requirements in industrial workflows. 1. Reference Hydrocarbon for Octane Number DeterminationResearch and commercial fuel developers use this compound as a component in calibration blends for octane number measurement. It provides a branched alkane benchmark for engine testing, directly impacting quality control and regulatory submission for gasoline formulations. Blending runs require precise proportions to ensure calibration traceability for research octane number (RON) and motor octane number (MON) determination, as outlined in ASTM protocols. The compound is weighed and introduced alongside n-heptane and iso-octane in exact mixture ratios prior to engine knock tests. Industry compliance standards
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2. Solvent Component in Analytical Laboratories (GC Reference Use)Laboratory analysts utilize 2,3-dimethylheptane as a non-polar hydrocarbon solvent and retention index marker in capillary gas chromatography (GC). Its well-defined volatility and inertness make it a key peak identification aid during hydrocarbon profile analysis. Technicians add this compound into sample diluents, especially for tests evaluating hydrocarbon composition of fuels, oils, and environmental matrices. Precision in solvent formulation supports reproducible sample vaporization and chromatography validation. Industry compliance standards
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3. High-Performance Fuel Additive Intermediate (Aviation and Motorsport Blends)Fuel manufacturers incorporate the material as a blending constituent when formulating high-octane, clean-burning fuel blends targeted to motorsport and aviation. Its structure enhances controlled volatility and knock-resistance. Integration requires adherence to specific blending limits for branched paraffinic hydrocarbons defined by target market and application guidelines. Technicians check physical compatibility before adding it into the base fuel blend at specified stages and perform ongoing blend validation per aviation downstream certifications. Industry compliance standards
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4. Synthetic Lubricant Base Stock ModifierLubricant formulators use this branched alkane as a pour point depressant and viscosity modifier in select synthetic base stock formulations, especially when targeting low-temperature fluidity. Carefully metered addition into pre-mix stages allows downstream blenders to fine-tune flow properties and oxidation resistance. During production, process managers must ensure the content does not disrupt overall additive package stability or misalign with specific lubricant sector regulations. Industry compliance standards
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5. Petrochemical Research & Reaction Kinetics StudiesPetrochemical R&D centers use the compound in reactivity studies involving branched hydrocarbons. It acts as a control or comparison substance in cracking, isomerization, and alkylation pilot studies. Researchers mix it as a measured input with feedstocks to analyze conversion rates, byproduct distribution, and pathway selectivity. The precise addition into reaction vessels follows protocols determined by laboratory method validation and chemical safety requirements. Industry compliance standards
Typical usage ratio
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From daily process supervision to final drum inspection, each step toward our finished 2,3-Dimethylheptane reflects an insistence on reliability. Our operators, chemists, and blending staff work the reactors and separation trains ourselves; we rely on our own laboratories for every purity result. Day in, day out, this muscle memory around C9 isomers sets the product apart from bulk mixtures or downgraded imports that sometimes circulate the market. Our technical process covers straight-chain and branched variants, but the challenge in scaling up clean, high-assay 2,3-Dimethylheptane taught us where edge control and plant know-how matter most.
Practical handling defines our relationship with this hydrocarbon. Rather than just listing a compound and packing it off, we track comparative data, side-by-side, over time—each year reviewing deviation charts, not just COA snapshots. Some customers use our 2,3-Dimethylheptane in reference mixtures for ASTM volatility standards, others prefer it for octane research or GC resolution calibrations. Each batch matters because once real equipment meets finishing liquid, small offcuts or unresolved components ripple through downstream readings. We have seen how a fractional percent of unseparated C9 gets exaggerated in trace analysis labs, so our operators pull spot samples at several tower elevations, not just the final draw. Several years ago, this caught a depropanizer slippage that traders and most tollers missed entirely.
Technically, 2,3-Dimethylheptane presents fewer handling headaches than many unsaturated or aromatic C9s. It stays colorless, has stable volatility under lab conditions, and resists light-induced breakdown. We make it from select alkylation using targeted feedstocks—treating the building blocks as carefully as any pharmaceutical firm treats vintage fermentation. Sourcing genuine, unblended precursors directly (not scavenging from mixed raffinate pools) gives distinct headspace GC and NMR signals, which have helped our reference lots set new accuracy bars for calibration fluid suppliers.
Some end-users think a C9 paraffin is ‘just another hydrocarbon,’ yet in our technical staff’s experience, that minor branching of 2,3-dimethyl position influences ignition profiles and vapor pressure curves far outside what crude heptane or non-isomerized blends can deliver. Whether we are tasked with tight API reference specifications or a customer requests custom isomer ratios, we do not shortcut on precursor assay. More than once, research partners brought us off-grade samples from supposedly major factories. When our QC team reran these using high-resolution GC-MS, unresolved impurity traces popped up — olefins, light cyclics, heavier branches — none visible on the coarse tests, all possible sources of error downstream.
Workers who blend, distill, and drum at the source touch every lot. In our plant, operators take responsibility for real-time results, adjusting reflux ratios, observing color and clarity at every batch breakpoint. We do not buy and sell through warehousing intermediaries. Front-line staff tracks audit trails straight down to sourcing logs, right through reactor logs and shipping manifests—because if a detail goes missing, recourse means eliminating risk, not explaining away errors.
Over many years, we’ve fielded customer concerns on product traceability. Anyone who’s ever fielded a call from a lab after a “bad batch” knows there is no substitute for direct control. Our staff tweaks the process promptly when odd readings turn up. Once, a customer flagged enhanced retention times on their FID detector—before any complaints about volatility in use. We could consult our log, pinpoint which batch and shift, review logs and solution samples, and provide not just replacement but root-cause confirmation. Distributors often lack this deep audit record; manufacturers with boots in the plant spot the difference right down to the label glue.
Many of our clients come from fuel testing, GC column manufacturing, and university research. Their needs stretch beyond a generic hydrocarbon. Some demand trace-level impurity control: sulfur, nitrogenous residue, even trace glycols. Others focus on volatility, requesting precise control because misbehavior in an engine test or boiling point assessment means lost time, lost grant cycles, and costly recalibration. Through each use, real-time batch data travels with our product, including retention indices, certificate printouts, and assurance of shipping container inertion.
In our experience, researchers using less verified 2,3-Dimethylheptane often find odd results: reproducibility drops, artifact signals spike during low-concentration GC runs, calibration drifts over just a few weeks’ storage. Our staff have experimented directly with sub-lot samples, mixing off-brand imports with our control, and recorded the drop. Origin, handling, and plant diligence seem invisible—until the experiment refuses to repeat or fuel formulations veer from specification.
Where octane testing labs once settled for any C9, changing regulations mean tighter impurity controls. What used to “pass” for minor lab work now disqualifies entire blends from certified use, and our clients—engineers, chemists, and QA leads—find it valuable to deal directly with the team that saw each liter made, not a web front or reseller.
2,3-Dimethylheptane’s performance leaves straight C9 or alternative branched isomers behind, especially where boiling point or knock-resistance matter. Traditional n-heptane runs outside the target range for intricate octane blending or as a mimic for branching effects. Our technical team tracks density, flash point, and purity down to residue parts per million. We do not rely on supplier-supplied COAs; every data point stems from in-house testing, available with batch shipments and repeated on customer samples.
During comparative bench work, our QC techs saw that competitor batches with minor unresolved isomers gave different chromatographic responses—peaks bleeding into each other, unpredictable retention, or contamination risk. Authentic, plant-made 2,3-Dimethylheptane delivers purity, and that translates to more confident blending, better repeatability, and no “ghost” signals in fine resolution analysis.
Each outgoing drum leaves our plant with actual purity data. We focus on producing 2,3-Dimethylheptane above 99.5 percent, not just to satisfy minimum regulatory needs but from repeated real-world experience with research, calibration, and fuel usage. Sometimes, specs call for even tighter control; clients ring us for batches above 99.8 percent, and our in-plant distillation columns have achieved this when challenged.
Beyond carbon number, we also monitor trace sulfur, halides, nitrogen, and moisture, because every experienced chemist knows trace contaminants upset sensitive instrumentation and field trial results. In our experience, customer's older analytical protocols sometimes caught nothing unusual, but newer mass spectrometry and FID/GC tools now spot errors distributors miss. For this reason, we keep reference samples long after shipping—in case validation or retest is needed years later.
Anyone buying chemicals directly from a manufacturer values not just product, but stability of supply and qualification. Every seasonal run, we log plant output, adjust for domestic stockpiles, and anticipate changes in feedstock pricing or shipping regulation. Unlike brokers, we navigate customs, ADR, and local haulage rules as part of routine business, not as afterthoughts. This approach reduces delays and preserves both product condition and batch identity.
For years, industrial clients depended on spot-buys or on-demand shipment. Recent disruptions—from logistics gridlocks to regulatory harmonization across regions—put those arrangements at risk. We dedicate a portion of seasonal output to contingency stock and carry out shell tests on shipping containers. Talking directly with research heads, plant buyers, and QA teams, we discovered that a lost batch or anonymous supply creates more waste than paying for rigor up front.
Plant workers become real problem-solvers when needed. Direct handling steers quick adjustments in distillation or purification, not just correction after problems surface. Once, we faced an unwanted boiling range spike in early fall, traced back to subtle feedstock blending differences after a refinery overhaul. Our in-house crew isolated the culprit, adjusted the cut, and preserved output for specification. These skills pay off when a fuel engineer flags an odd volatility curve or a reference lab calls for out-of-season supply.
Researchers trust our batches for repeatability and transparency. Our facility keeps detailed process logs, not only for regulatory audit but for repeated customer questions on production method, runtime, or quality assurance. These logs are open for customer view at request, within business confidentiality. Our record-keeping spots trends in blending or impurity creep before market recall ever becomes a threat.
We monitor solvent emissions, liquid waste output, and finished product off-gassing as part of routine EH&S work. Our team trains operators directly, combining old-hand knowledge with formal procedures; we supplement this with fresh reviews any time a near-miss or process incident occurs—even if unaffected lots. 2,3-Dimethylheptane handles safely compared to more volatile or toxic C9s yet, as any veteran knows, overfilling drums or missing a cracked seal leads to problems outside the plant: transporters, warehouse teams, and lab staff inherit these headaches. We cap every outgoing drum under nitrogen and on-site test each closure. Once, a hauler flagged seepage risk—tracked down to a supplier batch of outdated seals, since replaced by a more reliable vendor. That lesson, costly at the time, improved our procedure for every drum since.
Working closely with end-users, we learned the difference between supply that ‘meets the spec’ and results that truly add value. When a customer approaches us for calibration standards, custom blending, or impurity benchmarks, we offer direct discussion with our lab and production teams. We invite technical visitors on-site where possible, because seeing the process, watching the runs, and directly examining drums answers more questions than a thousand emails ever could.
We collaborate with technical staff to modify shipping packagings, open batch records in the event of a lab issue, and run comparison testing with sample pulls straight from our reactors. Our involvement does not end at loading bay doors; follow-up includes data sharing, plant reviews, and method development in partnership with our customers' own QA or research units.
Market experience taught us that product labeled as 2,3-Dimethylheptane covers a wide real-world spectrum. Direct producers track and solve challenges as part of their process, while resellers pass along previous performance without internal ability to validate, predict, or rectify. Chemical manufacturing at the source means recognizing real variability in feedstock and process drift, not just filling vessels with the assumed tub of pure molecules handed from elsewhere.
Differences in origin show up most clearly in long-term projects—ongoing calibrations, engine certifications, or environmental analyses. Once, a customer using discount paraffins from a broker brought us an entire panel of misbehaving chromatographs. Tracing back, we found unknown isomers and contamination outside stated limits—delivered with a “guaranteed spec” document copied from upstream product and never personally checked. Our in-house process proved the difference by isolating each fraction, drilling down to the very cut that failed to satisfy trace requirements.
Regulatory tightening and advances in analytical capability reshape what counts as high-quality product year after year. As field GC-MS detection limits shrink or fuel standardization protocols climb, yesterday’s standards no longer hold. Our plant does not wait for customer complaints; we run outlook tests with in-house methods, tapping updates in analytical science and regulatory standards before they appear in contract language. We share impurity research with our technical contacts, equipping them for upcoming changes instead of catching up after the fact.
As manufacturing teams, we deal with each lot starting from sourcing all the way through shipment. Our QC, logistics, and EH&S teams collaborate on each stage—not as an academic exercise, but because in the real world, missed detail or sloppiness interrupts customer workflows, damages research outcomes, and costs both trust and money. Plant-centered production keeps experience, accountability, and adaptability at hand.
In laboratory standards, fuel research, or custom blending, we have seen that real chemical manufacturing yields tangible improvements—less downtime, more reliable readings, fewer rejected batches at downstream sites. Our 2,3-Dimethylheptane, shaped by process, protocol, and pride in real work, meets these sharp needs. That’s where difference comes from, and our daily attention to every fraction and sample sustains confidence for every user, every time.
Any user working with this branch of fine alkanes benefits from the certainty that the people who made the chemical are still present to answer, support, and improve for next time.