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Isobutylamine

Also known as: 1-Amino-2-methylpropane, 2-Methyl-1-propanamine, 2-Methylpropylamine, 2-Methylpropanamine, 2-methylpropan-1-amine, IBA, MIBA, Valamine, i-Butylamine, isobutyl amine

Isobutylamine (CAS 78-81-9) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C4H11N and a molecular weight of 73.13680 g/mol. Key properties include a melting point of −85 °C(lit.), a boiling point of 64-71 °C(lit.), a density of 0.736 g/mL at 25 °C(lit.) and a flash point of -9.4 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H301 — Toxic if swallowed and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.
78-81-9
Jingsj CID
J-1062425-0
Molecular Formula
C4H11N
Molecular Weight
73.13680 g/mol
Category
Organic Bases
Last updated
11/2/2026
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Physicochemical Properties

Melting Point−85 °C(lit.)
Boiling Point64-71 °C(lit.)
Density0.736 g/mL at 25 °C(lit.)
Flash Point-9.4 °C
Exact Mass73.08910
PSA26.02000
LogP1.30140
Refractive Indexn20/D 1.397(lit.)
Additional Propertysoluble

GHS Safety & Compliance

Flammable / Corrosion / Acute ToxicitySignal word: Danger
  • H225 — Highly flammable liquid and vapour
  • H301 — Toxic if swallowed
  • H314 — Causes severe skin burns and eye damage

Frequently Asked Questions

What is the CAS number of Isobutylamine?

The CAS number of Isobutylamine is 78-81-9.

What are the molecular formula and molecular weight of Isobutylamine?

Isobutylamine has molecular formula C4H11N and molecular weight 73.13680 g/mol.

Is Isobutylamine hazardous?

Isobutylamine has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H301 — Toxic if swallowed; H314 — Causes severe skin burns and eye damage.

What are the upstream and downstream products of Isobutylamine?

For Isobutylamine, Upstream Products: Isobutylene, 2-Methylallylamine, Isobutyraldehyde oxime; Downstream Products: 4-[(isobutylamino)sulfonyl]benzoic acid, N-isobutyl-N-isopropylamine, 2-(propan-2-yl)-1H-benzimidazole.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Isobutylamine (CAS 78-81-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1062425-0 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.