n-Heptane (CAS 142-82-5), also known as normal heptane or dipropyl methane, is the straight-chain C₇ alkane: a clear, colourless, highly flammable liquid with a gasoline-like odour, a boiling point of 98.4 °C, a flash point of approximately −4 °C and a density of 0.684 g/cm³. Its commercial identity rests on a property profile that is deceptively simple but exceptionally difficult to replicate at specification: n-heptane is the reference non-polar solvent, the molecule against which octane is defined and the medium in which non-polar active pharmaceutical ingredients are crystallized, washed and purified. That dual identity as both an industrial reference standard and a pharmaceutical processing solvent explains why the market is measured in hundreds of millions of dollars rather than in commodity tonnes, and why grade purity—95%, 97%, 99% and electronic grade—determines which application a given lot can enter. The global n-heptane market was valued at approximately USD 148–154 million in 2025, with forecasts ranging from USD 183 million by 2032 at a 3.1% CAGR to USD 246.96 million by 2034 at a 5.4% CAGR, depending on scope. Volume stood at around 170 thousand tonnes in 2021, with projections of approximately 300 thousand tonnes by 2035 at a roughly 4% CAGR. China is the largest producer, with an estimated 148 thousand tonnes per year of output, and Asia-Pacific is the largest consumption region with a share above 45%. The qualifying question for buyers is therefore not “what does a tonne of n-heptane cost” but “which grade, benzene and sulfur profile, and documentation package does my application actually require.”
Core Application Fields and Demand Architecture
n-Heptane demand concentrates in four functional arenas where its non-polar character and defined volatility are difficult to substitute at equivalent specification: pharmaceutical intermediates and API processing, electronics and precision cleaning, paints, coatings and industrial solvents, and reference-standard and analytical applications.
In pharmaceutical intermediates and API processing, n-heptane is the non-polar solvent of choice for extraction, recrystallization, washing and purification. It serves as an antisolvent in crystallization—a role in which an API or intermediate is dissolved in a compatible solvent such as toluene and then precipitated by the addition of n-heptane—and as a washing medium for filter cakes and isolated solids where residual polar solvent must be removed without dissolving the product. Pharmaceutical intermediates represent the largest single application segment, followed by electronics and industrial solvents. The specification logic here is austere: benzene and sulfur must be controlled to low parts-per-million levels, evaporation residue must be minimal, and the lot must be accompanied by documentation that supports ICH Q3C residual-solvent compliance and, for regulated processes, pharmacopoeial-grade (Reag. Ph. Eur.) qualification. High-purity grades of 99% and above dominate this segment, because a crystallized API that carries a non-polar impurity from the mother liquor will fail assay or colour specification.
In electronics and precision cleaning, n-heptane is used for cleaning printed circuit boards, electronic components, liquid crystal displays and precision optical surfaces. The application values low-residue evaporation and compatibility with the materials being cleaned, and it is one of the reasons electronic-grade n-heptane commands a premium: a cleaning solvent that leaves a residue or attacks a polymer component fails at the device level, not in the certificate of analysis. Semiconductor cleaning and PCB assembly are identified as applications where low-residue solvents like n-heptane are critical, and the grade is used in LCD production and electronic degreasing.
In paints, coatings and industrial solvents, n-heptane functions as a non-polar thinner and carrier for oils, greases, epoxy resins, adhesives and rubber cements. It dissolves fats and oils effectively, and it is used in quick-drying rubber glue, printing inks and automotive parts cleaning. This segment is the largest by volume, holding approximately 55% of demand in 2021, but it is also the most price-sensitive and the most exposed to VOC regulation.
Reference-standard and analytical applications complete the demand base. n-Heptane is the zero point on the octane scale—iso-octane is defined as 100 and n-heptane as 0—and it is used as a reference fuel component in knock-engine testing and as a chromatographic solvent in TLC and column chromatography, typically in combination with ethyl acetate. These applications are small in volume but specification-intensive, and they anchor the molecule’s identity as a reference material rather than a generic solvent.
Regulatory Profile: A Non-SVHC Alkane Defined by Flammability, Aspiration Hazard and VOC Classification
n-Heptane is not a SVHC, is not on the REACH Candidate List and is not classified as a carcinogen, mutagen or reproductive toxicant. Its regulatory identity is defined instead by its flammability, its aspiration hazard, its narcotic effects and its status as a volatile organic compound (VOC).
The CLP classification is the central fact for handling. n-Heptane is Flam. Liq. 2 (H225, highly flammable liquid and vapour) , Skin Irrit. 2 (H315) , STOT SE 3 (H336, may cause drowsiness or dizziness) and, in the more complete SDS assessments, Asp. Tox. 1 (H304, may be fatal if swallowed and enters airways) and Aquatic Chronic 1 (H410, very toxic to aquatic life with long lasting effects) . The signal word is Danger, and the required precautions include eliminating ignition sources, avoiding breathing vapours and preventing release to the environment. The aspiration hazard is particularly relevant to handling and packaging: n-heptane has low viscosity and low surface tension, and small quantities aspirated into the lungs during ingestion or vomiting can cause chemical pneumonitis.
Occupational exposure limits are jurisdiction-specific. ACGIH recommends a TLV-TWA of 400 ppm for n-heptane, with a ceiling of 500 ppm for CNS impairment, and the NIOSH REL is 85 ppm (350 mg/m³) as a TWA with a 440 ppm ceiling. In Russia and the EAEU, n-heptane is regulated through sanitary-hygienic norms for workplace air, and imported material must be accompanied by a Russian-language SDS that states the applicable limits and the required ventilation and PPE measures.
VOC regulation is the structural constraint on the solvent segment. n-Heptane is a VOC, and the EPA has recorded hazardous-substance release reports involving n-heptane, which has translated into regulatory scrutiny and inspections under OSHA. The practical consequence is not a ban but a gradual squeeze on open-use solvent applications in mature markets, with substitution pressure strongest in consumer and decorative coatings and weakest in pharmaceutical processing and electronics cleaning, where performance and residue specifications dominate.
Transport classification completes the regulatory picture. n-Heptane is UN 1206, Class 3, Packing Group II, a highly flammable liquid. This classification governs packaging, labelling, segregation and transport documentation, and n-heptane cannot move through standard channels without dangerous-goods paperwork. For Russian and EAEU buyers, the shipment must carry UN 1206 documentation, and the packaging must be verifiable as compliant before release.
Global Supply Structure and Manufacturer Differentiation
Global n-heptane supply is moderately concentrated at the high-purity end and more fragmented at the industrial-solvent end. The top three manufacturers—identified across market reports as SK, Shell and Chevron Phillips Chemical—hold approximately 45–50% of the market, and the broader producer landscape includes ExxonMobil, Phillips 66, Mitsubishi Shoji Chemical, Hanwha Total Petrochemical, Haltermann Carless, TOA Oil, and a cohort of Chinese producers including Chuzhou Runda Solvents, Henan ZT League Chemical, Liaoning Yufeng Chemical, Liyang Liancheng, Wuyang Chemical and ZT League. China is the largest single producing country, and South Korea has been identified as the largest exporter by volume.
Differentiation operates on three axes that matter more to a pharmaceutical process chemist or an electronics engineer than the headline purity figure. The first is benzene and sulfur control. n-Heptane is produced by fractional distillation of petroleum and by separation from reformate streams, and residual benzene and sulfur carry through to the final lot. In API crystallization, a benzene impurity can appear in the isolated solid and complicate ICH Q3C compliance; in electronics cleaning, sulfur can corrode sensitive metallization. A supplier that controls benzene and sulfur to low parts-per-million levels and documents them lot by lot can serve regulated pharmaceutical and electronic accounts that an industrial-solvent supplier cannot. The second axis is grade breadth and documentation depth. A supplier that can offer 95%, 97%, 99% and electronic-grade material from a consistent production and analytical platform, with pharmacopoeial-grade (Reag. Ph. Eur.) qualification where required, allows a customer to scale from one application to another without re-qualifying a new source. The third axis is supply reliability and dangerous-goods logistics. n-Heptane moves in bulk, ISO tanks, drums and IBCs, and the UN 1206 Class 3, PG II classification means packaging and transport documentation are part of the product. A supplier that can arrange compliant dangerous-goods logistics to Russia and the EAEU, with Russian-language SDS and UN 1206 documentation, reduces the buyer’s clearance and qualification burden.
Regional Demand Dynamics
n-Heptane demand is regionally asymmetric in a way that follows pharmaceutical manufacturing, electronics production and coatings consumption rather than the geography of crude oil or natural gas.
Asia-Pacific is the largest and most dynamic region, with a consumption share above 45% and the highest growth potential through emerging markets in China, India and Southeast Asia. China is both the largest producer and a major consumer, and its output of approximately 148 thousand tonnes per year supports domestic pharmaceutical, electronics and coatings demand as well as export flows. India is a growing import market, with reported imports of 4,400 metric tonnes, reflecting the expansion of generic-drug manufacturing and coatings production. South Korea occupies a dual position as a major producer and the largest exporter by volume, supplying high-purity material into regional and global supply chains.
North America and Europe are mature, specification-intensive markets. North American demand is anchored in pharmaceutical manufacturing, electronics cleaning and reference-standard applications, with a strong cGMP and residue-control culture that shapes supplier documentation expectations. The U.S. generates approximately 68,000 metric tonnes per year of n-heptane, and FDA records indicate that 132 facilities utilize the solvent, underlining the scale of the pharmaceutical and analytical base. Europe’s demand is shaped by REACH compliance, VOC regulation and a strong preference for pharmacopoeial-grade material in regulated pharmaceutical processes; 22 manufacturers are REACH-compliant in Europe, and the transition toward sustainable production methods is a stated market trend. Both regions are growing at low-to-mid single digits in volume, with value growth driven by high-purity and electronic-grade segments rather than by commodity solvent volume.
Russia and the EAEU form an import-dependent contour with a clear and documented trade structure. Trade data record imports of n-heptane (CAS 142-82-5, purity 99.16%) from China into Russia under HSN code 2901100009, with shipment quantities in the 12,480–15,600 kg range and the product described as a raw material for chemical production and an organic solvent, not for medical use. Russia and the CIS are separately identified as a distinct consumption region in market forecasts, and the region’s demand is concentrated in industrial solvents, chemical synthesis and pharmaceutical processing. There is no evidence of large-scale domestic n-heptane production at pharmaceutical or electronic grade, and the practical constraints for Russian buyers are UN 1206 Class 3 dangerous-goods logistics, Russian-language SDS, and a certificate of analysis that reports benzene, sulfur and evaporation residue against the grade specification. XINCHEM positions its n-heptane supply around this documentation and logistics requirement, offering Russian-language SDS and UN 1206 transport support alongside lot-specific analytical data, so that Russian and EAEU buyers can qualify imported material without reconstructing the compliance case internally.
Future Outlook and Strategic Imperatives
The n-Heptane market will grow at a moderate rate in volume—low-to-mid single digits depending on scope—but the composition of that growth is shifting toward high-purity and electronic-grade material, where impurity control and documentation depth matter more than commodity scale.
Three structural forces will shape competition. First, grade mix will determine revenue growth. The pharmaceutical intermediate segment remains the largest application and will continue to command a premium for 99%+ and pharmacopoeial-grade material, while electronics cleaning will grow as semiconductor and display production expands in Asia. Suppliers that can hold benzene and sulfur specifications across lots, and document them on the certificate of analysis, will be better positioned than those offering only an industrial-solvent cut. Second, VOC regulation and bio-based substitution will exert pressure on the solvent-grade segment in paints and coatings. n-Heptane is a VOC, and bio-based solvents are emerging as alternatives; nine EU-funded research projects are investigating substitutes, according to the European Commission. The substitution pressure will be strongest in consumer and decorative coatings and weakest in pharmaceutical crystallization and electronics cleaning, where performance and residue requirements remain difficult to replicate. Third, supply reliability and documentation depth will matter more in import-dependent markets. A supplier that can provide a Russian-language SDS, UN 1206 dangerous-goods documentation and lot-specific benzene and sulfur data will be preferred over a spot trader that cannot support qualification.
For Russian and EAEU buyers, the strategic implication is that n-heptane procurement should be treated as a grade-and-documentation partnership rather than a price comparison. A lot that carries benzene or sulfur above the pharmaceutical specification does not simply cost the price of the drum; it can invalidate an API batch, force a re-crystallization step or trigger a customer audit finding. A shipment that arrives without a Russian-language SDS or UN 1206 documentation can be held at customs and disrupt a continuous crystallization or cleaning process. The lowest-risk supplier is the one that can match the grade to the application, document benzene and sulfur lot by lot, and support the buyer with Russian-language documentation and compliant dangerous-goods logistics—the position XINCHEM occupies for n-heptane in the Russian and EAEU market.
Shanghai XinChem Co., Ltd. (XinChem)
As a world-leading supplier of organic chemicals, Shanghai XinChem Co., Ltd. (XinChem) offers n-heptane (CAS 142-82-5) in 95%, 97%, 99% and electronic-grade specifications, serving pharmaceutical API and intermediate producers, electronics and precision cleaning customers, coatings and adhesives manufacturers, and analytical and reference-standard laboratories. Our n-heptane is supplied with controlled benzene and sulfur content, low evaporation residue, lot-specific certificate-of-analysis data and the documentation support—including Russian-language SDS and UN 1206 Class 3 transport documentation—that grade-specific qualification and dangerous-goods logistics require.
Technical and Quality Advantages
Grade-Specific Impurity Control: n-Heptane is supplied against 95%, 97%, 99% and electronic-grade specification windows, with benzene, sulfur and evaporation residue controlled to the limits relevant to the intended use. Because benzene and sulfur carry through to API assay, colour and electronic device performance, lot-level impurity data is the specification that determines whether the lot can enter a regulated crystallization process or a precision cleaning line rather than only a general-purpose solvent application.
Low Residue and Defined Volatility: n-Heptane’s value in pharmaceutical and electronic applications depends on clean evaporation without residue. XinChem controls evaporation residue and documents it on the certificate of analysis, so that the buyer can rely on the lot leaving no non-volatile carryover on an API filter cake or a cleaned electronic surface.
Lot-Specific Certificate of Analysis: Each lot is supported by a certificate of analysis reporting assay (GC), benzene, sulfur, water and evaporation residue against the agreed specification. For pharmaceutical and electronic customers, this documentation is the basis for incoming qualification and for demonstrating conformance to ICH Q3C residual-solvent and residue-control requirements.
Russian-Language SDS and UN 1206 Documentation: Safety data sheets are available in Russian and English, with documentation covering the H225, H304, H315, H336 and H410 classification, the applicable occupational exposure limits, and the UN 1206, Class 3, PG II transport classification. This package reduces clearance friction for a highly flammable liquid that cannot move without dangerous-goods documentation.
Packaging and Logistics Flexibility
n-Heptane is available in bulk and ISO tanks for large-volume pharmaceutical and industrial customers, in 200 L drums and IBCs for mid-scale formulation and cleaning operations, and in sealed containers for pilot, laboratory and electronic-grade qualification. For Russia and EAEU destinations, XinChem arranges Class 3 dangerous-goods logistics with UN 1206 documentation, Russian-language SDS and certificate-of-analysis support, reducing clearance friction for a product that is both highly flammable and specification-sensitive.
Application Support and Supply Reliability
XinChem’s technical team assists with grade selection for API recrystallization and washing, electronic cleaning and LCD processing, coatings and adhesives formulation, and reference-standard and chromatographic applications, and with the benzene, sulfur and documentation requirements that pharmaceutical and electronic qualification demands. Supply schedules accommodate both qualification orders and contract volumes, with stock and logistics planning aligned to the refining and trade-flow dynamics that shape n-heptane availability.
Why Choose XinChem
Expertise: Deep experience in non-polar hydrocarbon solvents and high-purity alkanes, with application knowledge spanning pharmaceutical crystallization, electronics cleaning, coatings and analytical chemistry.
Consistency: Control of benzene, sulfur and evaporation residue against grade-specific specifications—the parameters that determine whether n-heptane performs in a regulated API process or a precision cleaning step, or becomes an assay and residue problem.
Compliance Readiness: Documentation structured around ICH Q3C residual-solvent logic, pharmacopoeial-grade expectations where required, VOC-relevant specifications and UN 1206 Class 3 transport rules, with Russian-language SDS support.
Responsiveness: Direct technical and commercial access, with order structures from qualification volumes to bulk and contract supply.
Contact us now to discuss your n-heptane requirements and request a specification sheet or qualification sample.
Website: www.xinchem.com
Email: sales1@xinchem.com
WhatsApp: +86 18049800532
Post time: Nov-08-2026