Sulfenamide accelerators
Reacts with 2-mercaptobenzothiazole under oxidation to give CBS, a fast-curing delayed-action accelerator.
MBT + C₆H₁₁NH₂ → CBS
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Aminocyclohexane · hexahydroaniline · CHA · ≥99.5% commercial, LR and AR grades
Cyclohexylamine is a primary amine on a saturated six-membered ring: as strong a base as the straight-chain alkylamines, fully water-miscible and volatile enough to travel with steam. It is a leading neutralising amine for boiler and condensate treatment, the raw material for CBS rubber accelerator and cyclamate sweeteners, and an intermediate in agrochemical, pharmaceutical and dye synthesis. Chelora Amines supplies it worldwide and across India, in UN-specification packaging with a batch-wise COA and SDS.
72.07 + 11.09 + 14.01 + 2.02 ≈ 99.17 g/mol
Cyclohexylamine, also called aminocyclohexane, hexahydroaniline or CHA, is a clear, colourless to pale yellow, flammable liquid with a strong fishy, ammoniacal odour. It boils at about 134 °C, mixes with water in all proportions and forms a water azeotrope boiling near 96 °C.
Although it is made from Aniline, it behaves nothing like it. Saturating the ring removes the aromatic system, so the nitrogen lone pair is fully available and cyclohexylamine is roughly a million times more basic than aniline. That basicity, together with its volatility, is why it distributes through a steam system and neutralises carbonic acid in condensate lines.
It is manufactured mainly by catalytic hydrogenation of aniline, with a smaller share made by amination of cyclohexanol. Dicyclohexylamine, residual aniline, cyclohexanol and water are the impurities that matter, and all are controlled in the specification.
| Chemical name | Cyclohexylamine (cyclohexanamine) |
| Common synonyms | Aminocyclohexane, hexahydroaniline, CHA |
| CAS number | 108-91-8 |
| EC / EINECS number | 203-629-0 |
| HS / HSN code | 2921 30 (cyclanic, cyclenic or cycloterpenic amines) |
| Molecular formula | C₆H₁₁NH₂ (C₆H₁₃N) |
| Molecular weight | 99.17 g/mol |
| Appearance | Clear, colourless to pale yellow liquid |
| Odour | Strong, fishy, ammoniacal |
| Melting point | About −18 °C |
| Boiling point | About 134 °C |
| Density | About 0.865 g/cm³ at 25 °C |
| Vapour pressure | About 10 mbar at 20 °C |
| Flash point | About 28–32 °C (closed cup) |
| Auto-ignition temperature | About 290 °C |
| Solubility in water | Completely miscible |
| Water azeotrope | Boils at about 96 °C |
| pKa of conjugate acid | About 10.6 at 25 °C |
| UN number | UN 2357, Class 8 (subsidiary 3), packing group II |
Figures are typical literature values for orientation. Values for the material you order are stated on its Certificate of Analysis and Safety Data Sheet.
Cyclohexylamine is a strong, unhindered primary amine with a compact ring. It reacts like an alkylamine — readily acylated, alkylated and condensed — and its volatility and water miscibility shape how it is used.
Reacts with 2-mercaptobenzothiazole under oxidation to give CBS, a fast-curing delayed-action accelerator.
MBT + C₆H₁₁NH₂ → CBSReacts with sulfamic acid or sulfur trioxide to give cyclohexylsulfamic acid, the parent of cyclamate sweeteners.
C₆H₁₁NH₂ + SO₃ → cyclamateVolatilises with steam and neutralises carbonic acid in condensate, raising pH and cutting corrosion.
CO₂ + H₂O + amine → bicarbonateGives N,N-dimethylcyclohexylamine, a widely used catalyst for rigid polyurethane foam.
C₆H₁₁NH₂ + HCHO/H₂ → DMCHAPhosgenation gives cyclohexyl isocyanate; addition to isocyanates gives cyclohexyl ureas for herbicides and drugs.
RNCO + C₆H₁₁NH₂ → ureaReacts with acid chlorides and anhydrides to N-cyclohexyl amides for pharma, agro and polymer additives.
RCOCl + C₆H₁₁NH₂ → amideForms cyclohexylammonium salts, including volatile corrosion inhibitor salts used in packaging.
acid + C₆H₁₁NH₂ → saltCondenses with aldehydes and ketones to Schiff bases, used as intermediates and latent curing agents.
RCHO + C₆H₁₁NH₂ → imineProcess notes. Cyclohexylamine has a flash point near 30 °C and is corrosive and toxic by skin contact. It forms a water azeotrope, so dry product picks up moisture readily. Dose under control with cooling, and keep transfers closed, earthed and under nitrogen.
Discuss your processCyclohexylamine is made mainly by hydrogenating aniline, and the route sets the impurity profile: dicyclohexylamine from coupling, unreacted aniline, and oxygenates from side reactions.
Aniline is fed with hydrogen, and usually some ammonia, to a hydrogenation reactor. A smaller share of production aminates cyclohexanol instead.
Over a cobalt, nickel or ruthenium catalyst at elevated temperature and pressure, the aromatic ring is saturated; ammonia suppresses dicyclohexylamine.
The reactor delivers cyclohexylamine with dicyclohexylamine, unreacted aniline, water and small amounts of cyclohexanol and cyclohexanone.
Hydrogen and ammonia are recycled; distillation breaks the water azeotrope, takes the cyclohexylamine cut and leaves dicyclohexylamine as a co-product.
Product is tested for assay, dicyclohexylamine, aniline, oxygenates, water and colour, then filled under nitrogen into carboys, drums, totes or bulk containers.
Residual aniline is the limit most buyers watch. It is an aromatic amine with its own toxicology, and in boiler-water, food-adjacent and pharmaceutical use it is kept low. Dicyclohexylamine changes the stoichiometry of CBS and cyclamate production, and cyclohexanol and cyclohexanone show up as oxygenates on GC.
Water matters because cyclohexylamine is hygroscopic and forms an azeotrope, and colour rises with air exposure. Where a registration dossier or a validated process names limits, send them with the enquiry and we will match the batch rather than send the standard cut.
Twelve months in sealed original packing, kept cool and out of sunlight, is the normal working figure. Cyclohexylamine absorbs carbon dioxide and water from air; a white carbamate crust at the drum mouth is the usual sign of a drum left open.
Keep drums closed between draws, blanket tanks with nitrogen where you can, and re-check assay, water and colour before a critical batch from older stock. A retained sample of every batch is held here.
Tell us the reaction and the limits that matter and we will confirm the grade. Commercial grade covers most production use; LR and AR grades are available for laboratory, method development and analytical work.
The standard production grade for intermediates, salt formation and general synthesis.
Tighter limits on related amines, water and colour for development and pilot work.
The tightest grade we offer, for analytical method work, standards and QC laboratories.
Batches selected or sourced against limits you name, such as water, related amines or colour.
| Parameter | Test method | Typical specification |
|---|---|---|
| Appearance | Visual | Clear, colourless to pale yellow liquid |
| Assay (cyclohexylamine) | GC | ≥ 99.5 % w/w |
| Dicyclohexylamine | GC | ≤ 0.1 % w/w |
| Aniline | GC | ≤ 0.1 % w/w |
| Cyclohexanol + cyclohexanone | GC | ≤ 0.1 % w/w |
| Water | Karl Fischer | ≤ 0.2 % w/w |
| Colour | APHA | ≤ 15 |
Indicative specification for planning. The controlling document is the Certificate of Analysis issued for your batch. If your process needs tighter limits, say so at enquiry stage and we will quote against your specification.
Cyclohexylamine is often confused with aniline, from which it is made, and with dicyclohexylamine, which is made alongside it. The three behave very differently, and hexylamine — same carbon count, open chain — is different again.
| Property | Cyclohexylamine | Aniline | Dicyclohexylamine | Hexylamine |
|---|---|---|---|---|
| CAS number | 108-91-8 | 62-53-3 | 101-83-7 | 111-26-2 |
| Structure | NH₂ on a saturated ring | NH₂ on an aromatic ring | Secondary amine, two cyclohexyl rings | NH₂ on a straight C6 chain |
| Amine class | Primary aliphatic | Primary aromatic | Secondary aliphatic | Primary aliphatic |
| Boiling point | ≈ 134 °C | ≈ 184 °C | ≈ 256 °C | 131–132 °C |
| pKa of conjugate acid | ≈ 10.6 | ≈ 4.6 | ≈ 10.4 | ≈ 10.6 |
| Water solubility | Miscible | ≈ 36 g/L | Slightly soluble | ≈ 12 g/L |
| Typical outlets | Boiler treatment, CBS, cyclamate, DMCHA | Dyes, MDI, rubber chemicals | DCBS accelerator, corrosion inhibitors, extraction | Inhibitors, surfactants, intermediates |
Order by full name and CAS number. State Cyclohexylamine and CAS 108-91-8 on the enquiry and the purchase order. "Hexahydroaniline" and "CHA" are both in use, and CHA is used informally for other products too.
See the full amine rangeWater treatment and rubber chemicals account for most of the volume, with sweetener, agrochemical and pharmaceutical intermediates taking the tighter grades.
Neutralising amine that raises condensate pH and protects return lines, alone or blended with other amines.
Feed for CBS sulfenamide accelerator and other rubber chemicals for tyre and technical compounding.
Raw material for cyclohexylsulfamic acid and sodium and calcium cyclamate, where these are permitted.
Intermediate for herbicides such as hexazinone and for other crop-protection actives.
Supplies the cyclohexylamino group in APIs and intermediates, including sulfonylurea-type drugs.
Volatile corrosion inhibitor salts, pickling inhibitors and metalworking additives.
Converted to N,N-dimethylcyclohexylamine, a standard rigid-foam catalyst.
Dye intermediates, textile auxiliaries, and a strong water-soluble base for synthesis.
If you are mapping a value chain, or looking for the product one step down from where you are, this is where Cyclohexylamine ends up. Several of these are chemicals we can also source for you.
| Derivative | Made by | End use |
|---|---|---|
| CBS (N-cyclohexyl-2-benzothiazolesulfenamide) | Oxidative coupling with 2-mercaptobenzothiazole | Rubber accelerator |
| Cyclohexylsulfamic acid and cyclamates | Sulfamation, then neutralisation | Non-nutritive sweeteners |
| N,N-Dimethylcyclohexylamine | Reductive methylation | Rigid PU foam catalyst |
| Cyclohexyl isocyanate | Phosgenation | Herbicide and pharma intermediates |
| Hexazinone | Multi-step route via cyclohexyl isocyanate | Triazinone herbicide |
| N-Cyclohexyl amides | Acylation | Pharma, agro and polymer additives |
| Cyclohexylammonium salts | Neutralisation with organic or inorganic acids | VCI packaging and corrosion inhibitors |
| N-Cyclohexyl ureas | Addition to isocyanates | API intermediates |
| Dicyclohexylamine | Co-product of manufacture | Rubber chemicals, inhibitors, extraction |
| Schiff bases | Condensation with aldehydes or ketones | Intermediates and latent hardeners |
Looking for one of these rather than the amine itself? Ask us — several sit within our sourcing network, and we can quote the derivative and the raw material together.
Every container carries the Chelora Amines label with product name, net weight, batch number, manufacturing date, UN number and hazard pictograms.
HDPE carboys for lab qualification, pilot batches and low-consumption users.
MS and HDPE drums, the standard production pack, with tamper-evident closures.
Forklift-ready totes with bottom valves for plants drawing material every week.
Bulk loads and ISO tank containers for continuous plants and large campaigns.
Tell us the monthly draw and how you store hazardous liquids, and we will recommend the grade, pack size and delivery schedule. Export consignments are packed in UN-specification drums and totes, palletised and stretch-wrapped, and shipped FOB, CIF or CFR through Nhava Sheva and Mundra.
Plan my supplyCyclohexylamine is a flammable, corrosive and toxic base with a flash point near 30 °C, and it is classified as suspected of damaging fertility. The notes below are a summary for planning only — work to the Safety Data Sheet supplied with your consignment and to your own site risk assessment.
Cyclohexylamine is a regulated dangerous good in transport. That is routine for us, but it shapes what we need from you before a first shipment moves.
| Proper shipping name | Cyclohexylamine |
| UN number / class | UN 2357 · Class 8, subsidiary risk 3 |
| Packing group | II |
| Labels | Corrosive and flammable labels |
| Modes | Road, rail and sea (IMDG); air movement within dangerous goods quantity limits |
| Segregation | Away from acids, oxidisers, halogens and foodstuffs |
| Packaging | UN-specification drums, carboys and IBC totes, palletised and strapped for export |
We supply business to business only, against verified company credentials, consignee details and a signed end-use declaration, plus any import permit the destination country requires.
Start account opening| Parameter | Specification | Result |
|---|---|---|
| Appearance | Clear, colourless to pale yellow liquid | Complies |
| Assay (cyclohexylamine) | ≥ 99.5 % w/w | Complies |
| Dicyclohexylamine | ≤ 0.1 % w/w | Complies |
| Aniline | ≤ 0.1 % w/w | Complies |
| Cyclohexanol + cyclohexanone | ≤ 0.1 % w/w | Complies |
Cyclohexylamine is checked before dispatch and each consignment leaves with the paperwork your QC, stores and accounts teams need on day one.
The numbers on a Certificate of Analysis are only useful if you know how they were produced. These are the methods behind the figures on ours, and the checks worth repeating at your own goods-inward.
Separates the amine from related amines and residual solvents in one run, and gives both the assay and the impurity profile that matter to your reaction.
An independent check on total amine content, useful as a quick goods-inward confirmation before a drum is released to production.
Water determination, which matters wherever the next step is moisture sensitive or the amine feeds an anhydrous reaction.
A visual platinum–cobalt comparison. A rising colour value is the earliest sign that a pack has been exposed to air or held too long.
Fast confirmation of identity and strength, and a simple way to spot a wrong pack or a contaminated drum.
Gravimetric residue and trace metal checks, which matter for catalytic steps and regulated formulations.
A sample from every dispatched batch is held here, so a query months later can be settled against the original material.
The batch number on the label ties back to the COA, the test record and the supply lot, which is what your auditor will ask to see.
Where your customer or regulator needs an independent result, we can arrange analysis at a NABL-accredited laboratory before dispatch.
Five steps for a first order of Cyclohexylamine. Repeat orders follow the same route on a schedule that matches your consumption.
Grade, quantity, pack size and delivery location.
We confirm the grade for your process and quote, usually within 24 hours.
The batch is tested and the COA, SDS and invoice details are prepared.
Labelled packs move by road, or in UN-spec packaging for export.
Material reaches your gate and repeat dispatches are scheduled to your usage.
Cyclohexylamine is a line on a price list and a headache in a warehouse. What separates suppliers is the grade flexibility, the paperwork and the answer you get when something is not routine.
Cyclohexylamine sits alongside the rest of our amine range, from ethanolamines to fatty amines. Your purchase team raises one enquiry, compares one quote and manages one vendor record instead of six.
Commercial, LR and AR grades are available, so you are not forced to redesign a step around the only grade your supplier happens to carry.
COA, SDS, correct HSN and HS codes, dangerous goods declarations and certificates of origin are prepared with the consignment, not chased afterwards.
Tell us your limits on assay, dicyclohexylamine, aniline, water and colour and we quote against them, rather than sending the standard cut and letting your QC find out.
Once we know your monthly draw we hold and release material on a schedule, so you carry less inventory of a hazardous product.
Describe the reaction or formulation rather than the product code and we will tell you which grade fits — and say so plainly when a different amine would serve you better.
Buyers who order Cyclohexylamine usually source these from the same list. Open any product for its specification, grades and packing, or see the full product range.
Container shipments to buyers on five continents, plus road dispatch inside India. Tell us your country and destination port and we will quote landed terms, transit time and the documentation your customs broker will ask for.
United Arab Emirates, Saudi Arabia, Oman, Qatar, Kuwait, Bahrain, Jordan, Egypt, Morocco, Kenya, Tanzania, Ethiopia, Nigeria, Ghana and South Africa.
Bangladesh, Sri Lanka, Nepal, Pakistan, Vietnam, Thailand, Indonesia, Malaysia, Singapore, the Philippines, South Korea, Japan, Taiwan, Australia and New Zealand.
Germany, the Netherlands, Belgium, France, Italy, Spain, Portugal, Poland, Czechia, the United Kingdom, Ireland, Türkiye, Russia, Ukraine, Kazakhstan and Uzbekistan.
United States, Canada, Mexico, Brazil, Argentina, Chile, Colombia, Peru, Ecuador and the Caribbean, shipped in UN-specification packaging with full DG documentation.
| Incoterms quoted | EXW, FOB, CFR, CIF and DAP, depending on your destination and preference |
| Load ports | Nhava Sheva (JNPT) and Mundra, with Chennai and Kolkata used for eastbound routings |
| Container options | Full container loads, and consolidated LCL shipments for smaller quantities |
| Typical container fill | Around 80 drums, or roughly 18 to 20 IBC totes, in a 20 ft container |
| Packing for export | UN-specification drums and totes, palletised, strapped and stretch-wrapped, with DG labelling |
| Air freight | Possible for small quantities within dangerous goods limits; most volume moves by sea |
| Payment terms | Advance, irrevocable letter of credit or agreed credit terms for established accounts |
| Before first shipment | Company credentials, end-use declaration and any import permit the destination country requires |
Most delays in quoting Cyclohexylamine come from a missing line in the enquiry, not from availability. Send these details and a firm price usually comes back the same day.
Not sure of some of it yet? Send what you have. A description of the reaction step and an approximate monthly volume is enough for us to come back with a recommended grade, a pack plan and an indicative price.
Send an enquiryPlain definitions of the words that appear on a Cyclohexylamine specification, label and shipping document.
Short answers to what purchase, plant and QC teams ask us most about this product. Anything else, ask us directly.
Send the grade, quantity, pack size and your delivery address or destination port. We come back with a price, the documents that go with the batch and a dispatch or shipping plan, usually within 24 hours.