3,4,5-Trimethylaniline

Also known as: 3,4,5-Trimethylbenzenamine, Benzenamine, 3,4,5-trimethyl-, NSC 403297, 3,4,5-Trimethylaniline 98%

3,4,5-Trimethylaniline (CAS 1639-31-2) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C9H13N and a molecular weight of 135.206 g/mol. Key properties include a melting point of 79-80°C, a boiling point of 246.9±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 109.6±14.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1639-31-2
Jingsj CID: J-1370387-2
Molecular Formula: C₉H₁₃N
Molecular Weight: 135.206 g/mol
Category: Organic Bases
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	79-80°C
Boiling Point	246.9±9.0 °C at 760 mmHg
Density	1.0±0.1 g/cm3
Flash Point	109.6±14.0 °C
Exact Mass	135.104797
PSA	26.02000
LogP	2.32
Vapor Pressure	0.0±0.5 mmHg at 25°C
Refractive Index	1.553
Storage Conditions	2-8°C

Customs & Trade Information

HS Code	2921430090
Summary	HS:2921430090 toluidines and their derivatives; salts thereof VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 3,4,5-Trimethylaniline?

The CAS number of 3,4,5-Trimethylaniline is 1639-31-2.

What are the molecular formula and molecular weight of 3,4,5-Trimethylaniline?

3,4,5-Trimethylaniline has molecular formula C9H13N and molecular weight 135.206 g/mol.

What are the upstream and downstream products of 3,4,5-Trimethylaniline?

For 3,4,5-Trimethylaniline, Upstream Products: Methanol, 1,2,3-Trimethyl-5-nitrobenzene, Formaldehyde; Downstream Products: 3,4,5-Trimethylphenol, 3,4,5-Trimethylbenzoic acid, 1,2,3-Trimethyl-5-nitrobenzene.

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

Last updated: 8/21/2026

How to cite: Jingsj. "3,4,5-Trimethylaniline (CAS 1639-31-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1370387-2 (accessed 2026-11-09).

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