Sulfenamide accelerators
Reacts with 2-mercaptobenzothiazole under oxidation to give TBBS, the delayed-action rubber accelerator.
MBT + tBuNH₂ → TBBS
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2-Methylpropan-2-amine · 2-aminoisobutane · ≥99% commercial, LR and AR grades
tert-Butylamine is the most hindered of the four butylamine isomers: a primary amine whose nitrogen sits on a fully substituted carbon. It is the key raw material for TBBS, the delayed-action sulfenamide rubber accelerator, and a building block in pharmaceutical and agrochemical synthesis. Chelora Amines supplies it worldwide and across India, in UN-specification packaging with a batch-wise COA and SDS.
48.04 + 9.07 + 14.01 + 2.02 = 73.14 g/mol
tert-Butylamine, also written 2-methylpropan-2-amine or 2-aminoisobutane, is a clear, colourless, highly flammable liquid that boils at about 45 °C, mixes with water in all proportions and carries a strong ammoniacal odour.
Its defining feature is steric bulk. Three methyl groups crowd the nitrogen, so it behaves as a strong but hindered base and a selective nucleophile. That hindrance is exactly what makes it valuable in rubber chemistry, where the tert-butylamino group in TBBS controls the scorch delay of a vulcanisation system.
It is manufactured by amination of isobutylene or tert-butanol with ammonia over an acidic catalyst, and is also obtained through routes based on MTBE-derived feedstocks. Residual isobutylene, tert-butanol, water and other butylamine isomers are controlled in the specification.
| Chemical name | tert-Butylamine (2-methylpropan-2-amine) |
| Common synonyms | 2-Aminoisobutane, 1,1-dimethylethylamine, trimethylaminomethane |
| CAS number | 75-64-9 |
| EC / EINECS number | 200-901-0 |
| HS / HSN code | 2921 19 (acyclic monoamines and derivatives) |
| Molecular formula | (CH₃)₃CNH₂ (C₄H₁₁N) |
| Molecular weight | 73.14 g/mol |
| Appearance | Clear, colourless, mobile liquid |
| Odour | Strong ammoniacal |
| Melting point | About −67 °C |
| Boiling point | 44–46 °C |
| Density | About 0.696 g/cm³ at 20 °C |
| Vapour pressure | About 400 mbar at 20 °C |
| Flash point | About −38 °C (closed cup) |
| Auto-ignition temperature | About 380 °C |
| Solubility in water | Completely miscible |
| pKa of conjugate acid | About 10.7 at 25 °C |
| UN number | Classified as Class 3 (subsidiary 8), packing group II — see batch SDS |
Figures are typical literature values for orientation. Values for the material you order are stated on its Certificate of Analysis and Safety Data Sheet.
tert-Butylamine is a strong, hindered primary amine: reactive enough for routine acylation and substitution, bulky enough to stop at the mono-substituted product, and easy to remove afterwards because of its low boiling point.
Reacts with 2-mercaptobenzothiazole under oxidation to give TBBS, the delayed-action rubber accelerator.
MBT + tBuNH₂ → TBBSReacts with acid chlorides and anhydrides to give N-tert-butyl amides used in pharma and agro synthesis.
RCOCl + tBuNH₂ → amideServes as a source of the tert-butylamino group in β-agonist style side chains and triazine herbicides.
Ar–Cl + tBuNH₂ → Ar–NHtBuWith a conjugate-acid pKa near 10.7 it holds pH steady and strips easily under vacuum.
pKa ≈ 10.7 at 25 °CAdds across isocyanates to give N-tert-butyl ureas, several used as herbicides.
RNCO + tBuNH₂ → ureaGives N-tert-butyl sulfonamides that resist hydrolysis, used in pharma synthesis.
RSO₂Cl + tBuNH₂ → sulfonamideOpens epoxides to give tert-butylamino alcohols, the motif of several β-agonists.
epoxide + tBuNH₂ → amino alcoholNeutralises acids to give tert-butylammonium salts used in resolution and formulation.
acid + tBuNH₂ → saltProcess notes. The amine boils at about 45 °C and has a flash point near −38 °C. Dose under control with cooling and a condenser rather than heating a closed vessel, and keep all transfers earthed and under nitrogen.
Discuss your processtert-Butylamine is made by catalytic amination, and the route sets the impurity profile: related amines from over- or under-reaction, and residual feedstock from incomplete conversion.
Isobutylene or tert-butanol is fed with a large excess of ammonia to a fixed-bed reactor.
Over an acidic zeolite or similar catalyst at elevated temperature and pressure, ammonia adds to the tertiary carbon to give the primary amine.
The reactor delivers tert-butylamine with unreacted ammonia, water, tert-butanol and traces of di-tert-butylamine and oligomers.
Ammonia is recovered and recycled; distillation separates the amine, and it forms a water azeotrope that has to be broken to reach anhydrous quality.
Product is dried, tested for assay, isomers, tert-butanol, water and colour, then filled under nitrogen into carboys, drums, totes or bulk containers.
Residual tert-butanol and isobutylene come from incomplete conversion, and other butylamine isomers carry through where a plant handles more than one. Water matters most: tert-butylamine is hygroscopic and forms a low-boiling azeotrope with it, so Karl Fischer water is one of the specification limits watched hardest.
For TBBS production the buyer's concern is usually water and colour, because both carry into the oxidative coupling step. 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. With a boiling point near 45 °C the amine is easily lost from a warm or part-filled drum, so keep packs cool and closed.
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 liquid |
| Assay (tert-butylamine) | GC | ≥ 99.0 % w/w |
| Other butylamine isomers | GC | ≤ 0.3 % w/w total |
| tert-Butanol | GC | ≤ 0.2 % w/w |
| Water | Karl Fischer | ≤ 0.3 % w/w |
| Colour | APHA | ≤ 15 |
| Non-volatile matter | Gravimetric | ≤ 0.05 % w/w |
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.
Four isomers share the formula C₄H₁₁N. tert-Butylamine is the most hindered and lowest-boiling, so it is not a family where substitution is safe.
| Property | tert-Butylamine | n-Butylamine | Isobutylamine | sec-Butylamine |
|---|---|---|---|---|
| CAS number | 75-64-9 | 109-73-9 | 78-81-9 | 13952-84-6 |
| Structure | NH₂ on a fully substituted carbon | Straight chain, NH₂ on carbon 1 | Branch on carbon 2, NH₂ on carbon 1 | NH₂ on carbon 2, chiral |
| Boiling point | 44–46 °C | 77–79 °C | 67–69 °C | 62–64 °C |
| pKa of conjugate acid | ≈ 10.7 | ≈ 10.8 | ≈ 10.4 | ≈ 10.6 |
| Chirality | None | None | None | One stereocentre |
| Steric access at nitrogen | Strongly hindered | Unhindered | Almost unhindered | Moderately hindered |
| Typical outlets | TBBS accelerator, pharma side chains, triazines | Rubber accelerators, pesticides, dyes | API side chains, sulfonamides, fragrances | Post-harvest fungicide, herbicides, chiral intermediates |
Order by full name and CAS number. State tert-Butylamine and CAS 75-64-9 on the enquiry and the purchase order. Short names and abbreviations are read differently by different suppliers.
See the full amine rangeRubber chemicals account for most of the volume, with pharmaceutical and agrochemical intermediates taking the tighter grades.
Feed for TBBS and TBSI sulfenamide accelerators used in tyre and technical rubber compounding.
Supplies the tert-butylamino group in bronchodilator side chains such as those of salbutamol and terbutaline.
Intermediate for triazine herbicides such as terbuthylazine and terbutryn.
Gives N-tert-butyl amides, ureas and sulfonamides where a bulky, stable group is wanted.
Used in film-forming inhibitor packages for oilfield and refinery service.
Feeds quaternary ammonium compounds and amphoteric surfactants with a bulky hydrophobe.
Introduces the tert-butylamino group into dye intermediates.
A hindered, volatile base and acid scavenger that strips easily under mild vacuum.
If you are mapping a value chain, or looking for the product one step down from where you are, this is where tert-Butylamine ends up. Several of these are chemicals we can also source for you.
| Derivative | Made by | End use |
|---|---|---|
| TBBS (N-tert-butyl-2-benzothiazolesulfenamide) | Oxidative coupling with 2-mercaptobenzothiazole | Delayed-action rubber accelerator |
| TBSI | Oxidation route from TBBS chemistry | Scorch-safe rubber accelerator |
| Terbuthylazine and terbutryn | Substitution on cyanuric chloride derivatives | Selective triazine herbicides |
| Salbutamol and terbutaline side chains | Alkylation with halo-ketone or epoxide intermediates | Bronchodilator APIs |
| N-tert-butyl amides | Acylation with acid chlorides or anhydrides | Pharma and agrochemical intermediates |
| N-tert-butyl ureas | Addition to isocyanates | Herbicides and polymer modifiers |
| N-tert-butyl sulfonamides | Reaction with sulfonyl chlorides | API and agro intermediates |
| tert-Butylammonium salts | Neutralisation with organic or mineral acids | Formulation and resolution work |
| tert-Butylamino alcohols | Ring opening of epoxides | API intermediates and surfactant additives |
| Quaternary ammonium compounds | Exhaustive alkylation | Biocides and phase-transfer catalysts |
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 supplytert-Butylamine is a highly flammable, corrosive base with a flash point around −38 °C and a boiling point close to ambient summer temperature. 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.
tert-Butylamine 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 | Amines, flammable, corrosive, n.o.s. (tert-butylamine) — or the entry stated on the batch SDS |
| UN number / class | UN 3286 / UN 2733 — confirm against batch SDS |
| Packing group | II |
| Labels | Hazard pictograms, with the technical name shown in brackets |
| Modes | Road, rail and sea (IMDG); air movement within dangerous goods quantity limits |
| Segregation | Away from acids, oxidisers, halogens, hypochlorites 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 liquid | Complies |
| Assay (tert-butylamine) | ≥ 99.0 % w/w | Complies |
| Other butylamine isomers | ≤ 0.3 % w/w total | Complies |
| tert-Butanol | ≤ 0.2 % w/w | Complies |
| Water | ≤ 0.3 % w/w | Complies |
tert-Butylamine 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 tert-Butylamine. 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.
tert-Butylamine 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.
tert-Butylamine 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 material is 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 related amines, water or 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 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 tert-Butylamine 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 tert-Butylamine 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 tert-Butylamine 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.