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3,5-Dimethyl-1,2-phenylenediamine

Also known as: 1,2-Diamino-3,5-dimethylbenzene, 3,5-Dimethyl-1,2-phenylenediamine, 3,5-Dimethyl-o-phenylenediamine, 4,6-Dimethyl-o-phenylenediamine, m-Xylene-4,5-diamine, (2-Amino-4,6-dimethylphenyl)amine, 3,5-Dimethylbenzene-1,2-diamine, 1,2-Diamino-4,6-dimethylbenzene, 3,5-Dimethyl-1,2-diaminobenzene, 1,2-Benzenediamine, 3,5-dimethyl-

3,5-Dimethyl-1,2-phenylenediamine (CAS 3171-46-8) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C8H12N2 and a molecular weight of 136.194 g/mol. Key properties include a melting point of 73-78℃, a boiling point of 272.1±35.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 139.4±25.4 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
3171-46-8
Jingsj CID
J-1583553-7
Molecular Formula
C8H12N2
Molecular Weight
136.194 g/mol
Category
Organic Bases
Last updated
8/21/2026

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Physicochemical Properties

Melting Point73-78℃
Boiling Point272.1±35.0 °C at 760 mmHg
Density1.1±0.1 g/cm3
Flash Point139.4±25.4 °C
Exact Mass136.100052
PSA52.04000
LogP0.97
Vapor Pressure0.0±0.6 mmHg at 25°C
Refractive Index1.619
Storage Conditions2-8°C

GHS Safety & Compliance

IrritantSignal word: Warning
  • H302 — Harmful if swallowed
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2921590090
Summary2921590090. other aromatic polyamines and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 3,5-Dimethyl-1,2-phenylenediamine?

The CAS number of 3,5-Dimethyl-1,2-phenylenediamine is 3171-46-8.

What are the molecular formula and molecular weight of 3,5-Dimethyl-1,2-phenylenediamine?

3,5-Dimethyl-1,2-phenylenediamine has molecular formula C8H12N2 and molecular weight 136.194 g/mol.

Is 3,5-Dimethyl-1,2-phenylenediamine hazardous?

3,5-Dimethyl-1,2-phenylenediamine has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

What are the upstream and downstream products of 3,5-Dimethyl-1,2-phenylenediamine?

For 3,5-Dimethyl-1,2-phenylenediamine, Upstream Products: 4,6-Dimethyl-2-nitroaniline, 4,6-dimethyl-2,1,3-benzothiadiazole, N-(2,4-dimethylphenyl)acetamide; Downstream Products: 4,6-Dimethyl-1,3-dihydro-2H-benzimidazol-2-one, 4,6-dimethyl-2,1,3-benzothiadiazole.

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

Last updated:

How to cite: Jingsj. "3,5-Dimethyl-1,2-phenylenediamine (CAS 3171-46-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1583553-7 (accessed 2026-11-09).

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