n-Butylamine
A four-carbon primary amine that sits quietly behind several very different end products: n-butylamine is the precursor to a rubber-vulcanization accelerator and a nylon plasticizer, and a reagent step in the synthesis of the fungicide benomyl and the antidiabetic drug tolbutamide.
Chelora Chemicals supplies n-butylamine to rubber-chemical, plastics, agrochemical and pharmaceutical-intermediate manufacturers worldwide, with full GHS documentation on every consignment.
Product identity
- CAS Number
- 109-73-9
- IUPAC name
- Butan-1-amine
- Molecular formula
- C₄H₁₁N
- Molecular weight
- 73.14 g/mol
- Boiling point
- 77 – 79 °C
- UN Number
- 1125
- SMILES
- CCCCN
- HS Code
- 2921 19*
* Confirm the current HS classification and import regulatory status for your destination with your own regulatory affairs team.
What n-Butylamine is used for
n-Butylamine is a colourless liquid that tends to yellow slightly on exposure to air, with a fishy/ammonia-like odour, fully miscible with water. It is the straight-chain primary amine among the four C4 butylamine isomers.
Its downstream chemistry is unusually varied for a single intermediate: it is the precursor to N,N'-dibutylthiourea, a widely used rubber-vulcanization accelerator, and to N-butylbenzenesulfonamide, a common nylon plasticizer. It also features in pesticide manufacture — including thiocarbazide intermediates and the fungicide benomyl — and in pharmaceutical synthesis, notably the antidiabetic drug tolbutamide, alongside use as an emulsifier component.
Where it sits among the butylamines
- n-Butylamine (this product) straight-chain, the most widely used of the four C4 isomers.
- Isobutylamine branched at the terminal carbon. See that page.
- sec-Butylamine amine on the second carbon, notable as a direct-use fungicide. See that page.
- tert-Butylamine fully branched at the amine-bearing carbon. See that page.
Appearance and handling character
n-Butylamine is highly flammable and corrosive, fully water-miscible, and carries a distinctive fishy odour even at low concentrations.
| Parameter | Typical value |
|---|---|
| Appearance | Colourless to pale yellow liquid, fishy/ammonia odour |
| Assay | 99.0% min |
| Water content | 0.3% max |
| Colour (Hazen) | 30 max |
| Non-volatile residue | 0.05% max |
Important: the figures above are indicative of commercial material and are offered for planning only. The batch certificate of analysis is the governing document.
| Property | Value |
|---|---|
| Physical state | Liquid at room temperature |
| Boiling point | 77 – 79 °C |
| Melting point | -49 °C |
| Density (20 °C) | 0.740 g/mL |
| Water solubility | Fully miscible |
| Basicity | Strong base, typical of primary alkylamines |
Physical constants compiled from public reference data for CAS 109-73-9 and rounded for readability. Treat them as orientation, not as a specification.
Where our customers put this amine to work
A single straight-chain amine, four very different end industries.
Rubber-vulcanization accelerator precursor
Raw material for N,N'-dibutylthiourea, a widely used rubber-vulcanization accelerator.
- Technical-grade specification
- Bulk tonnage supply available
- Technical desk review on request
Nylon plasticizer intermediate
Precursor to N-butylbenzenesulfonamide, a common nylon plasticizer used in plastics processing.
- Multiple pack sizes available
- Full analytical documentation
- Small quantities for trials
Pesticide manufacture
Used in thiocarbazide intermediate chemistry and in the synthesis of the fungicide benomyl.
- Technical-grade specification
- Contracted annual tonnage supported
- Bulk tank or drum supply
Pharmaceutical synthesis
A reagent step in the synthesis of tolbutamide, a sulfonylurea antidiabetic drug, among other pharmaceutical routes.
- Research and process-scale quantities
- High-purity grade available on request
- Technical documentation supplied
Emulsifier component
Used as a reagent in the manufacture of certain emulsifier formulations.
- Packs from 1 L / 5 L
- Full analytical documentation available
- Retained sample held against the lot
Contract & scheduled supply
Producers running continuous specialty-amine consumption are supported with scheduled call-off tonnage.
- Annual contracts with scheduled call-off
- Price held across the contract period
- Second source held in reserve
How we supply n-Butylamine
Chelora Chemicals is a supplier and sourcing partner, not a manufacturer. With four butylamine isomers in common commercial use, getting the right one to the right process is the first thing we check before anything else.
We place your order with whichever qualified producer best matches your required grade, your price point and your delivery window.
We keep a second qualified source on this line, so a single-plant disruption never becomes your production problem.
- Isomer confirmed before we quote. n-, iso-, sec- and tert-butylamine are not interchangeable in downstream chemistry.
- Dangerous-goods documentation filed correctly. Class 3 with a Class 8 subsidiary risk needs both hazard sets declared accurately.
- Packing matched to the corrosive, flammable profile. UN-approved drums and IBCs rated for both hazard classes.
- Scheduled call-off scheduling. We hold contracted tonnage and release it against your production calendar.
- Batch traceability to the producing plant. Full chain of custody documentation on request.
- Export machinery handled in-house. Classification, approved packing, labelling, freight booking and customs paperwork are ours to manage.
Packed the way your plant receives it
Drum, IBC or bulk — tell us your preferred format and we will quote and classify to it.
200 L / 55 USG
Standard UN-approved steel drums for corrosive flammable liquids, the usual choice for most orders.
Intermediate bulk containers
For mid-volume orders where drum handling becomes a logistics burden.
High-volume contracts
Bulk liquid transport for continuous-consumption customers on long-term supply agreements.
Incoterms to suit you
Quoted on the Incoterm your purchasing team works to, with dangerous-goods documentation filed before booking.
Trial / sample quantities
Small packs dispatched for process trials before a commercial order is placed.
Contracted call-off supply
We hold contracted tonnage and release it against your production calendar.
Flammable, corrosive, and harmful by inhalation and contact
n-Butylamine combines a flammability hazard with genuine skin and eye corrosivity. The summary below is orientation only — the safety data sheet supplied with your specific batch is the authoritative document.
Classified hazards
H225Highly flammable liquid and vapour.H302Harmful if swallowed.H312Harmful in contact with skin.H314Causes severe skin burns and eye damage.H332Harmful if inhaled.
Always read the SDS issued with your specific batch. Handle with chemical-resistant gloves, splash goggles and adequate ventilation.
Storage
Store in tightly closed, corrosion-resistant containers in a cool, well-ventilated area away from heat, sparks, open flame and oxidisers.
Handling
Use with local exhaust ventilation. Ground and bond containers during transfer to control static discharge in a flammable-vapour environment. Avoid skin and eye contact; have emergency eyewash and safety-shower provision nearby.
Transport
Ships as UN 1125, typically Class 3 (flammable liquid) with a Class 8 (corrosive) subsidiary risk. We confirm and document packing group and exact classification for your specific shipment and destination.
Every batch, documented
We verify documentation before dispatch so there are no surprises at your incoming-goods bench.
Specification agreed
Assay, water content and colour confirmed against your process requirement before order placement.
Producer batch testing
The producing plant tests each batch against the agreed specification before release.
Documentation review
COA, SDS and dangerous-goods paperwork checked by our desk before the shipment is booked.
Traceable dispatch
Each shipment is traceable to its producing batch, with full chain-of-custody records on request.
How n-butylamine is made
n-Butylamine is produced industrially by the catalytic amination of n-butanol with ammonia, a standard, well-established route for straight-chain primary alkylamine production.
We do not publish operating process parameters here; this is background only. Full technical and safety documentation accompanies every shipment, and any process-specific detail you need is best confirmed directly with our technical desk.
| Chemical family | Primary aliphatic amine, straight-chain (C4) |
|---|---|
| Basic character | Strong base, typical of primary alkylamines |
| Reactivity | Nucleophilic nitrogen; reacts readily with isothiocyanates, sulfonyl chlorides and isocyanates |
| Structural isomers | Isobutylamine, sec-butylamine, tert-butylamine |
Explore the wider amine range
n-Butylamine, answered
What is n-butylamine used for?
Is n-butylamine hazardous?
What is the UN transport classification?
What grade do you supply?
What packing do you offer?
Do you manufacture this yourself?
- Need a related isomer? See our Isobutylamine, sec-Butylamine and tert-Butylamine pages.
Get a quote on n-Butylamine today
Send us your required grade, pack size and delivery window. We will come back with a firm quote, lead time and full documentation.