3,3'-Dimethylbenzidine

Also known as: o-Tolidine, Tolidine, 2-Tolidine, 3,3'-Dimethyl-4,4'-biphenyldiamine, 4,4'-Diamino-3,3'-dimethylbiphenyl, DMB, EINECS 204-358-0, MFCD00014773, [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethyl-

3,3'-Dimethylbenzidine (CAS 119-93-7) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C14H16N2 and a molecular weight of 212.290 g/mol. Key properties include a melting point of 128-131 °C(lit.), a boiling point of 361.0±37.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 205.1±26.0 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H350 — May cause cancer and H411 — Toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 119-93-7
Jingsj CID: J-1408214-0
Molecular Formula: C₁₄H₁₆N₂
Molecular Weight: 212.290 g/mol
Category: Organic Bases
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	128-131 °C(lit.)
Boiling Point	361.0±37.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	205.1±26.0 °C
Exact Mass	212.131348
PSA	52.04000
LogP	2.48
Vapor Pressure	0.0±0.8 mmHg at 25°C
Refractive Index	1.638
Additional Property	2% HCl: 10 mg/mL, clear

GHS Safety & Compliance

Irritant / Health Hazard / Environmental HazardSignal word: Danger

H302 — Harmful if swallowed
H350 — May cause cancer
H411 — Toxic to aquatic life with long lasting effects

Customs & Trade Information

HS Code	2921590090
Summary	2921590090. 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 3,3'-Dimethylbenzidine?

The CAS number of 3,3'-Dimethylbenzidine is 119-93-7.

What are the molecular formula and molecular weight of 3,3'-Dimethylbenzidine?

3,3'-Dimethylbenzidine has molecular formula C14H16N2 and molecular weight 212.290 g/mol.

Is 3,3'-Dimethylbenzidine hazardous?

3,3'-Dimethylbenzidine has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H350 — May cause cancer; H411 — Toxic to aquatic life with long lasting effects.

What are the upstream and downstream products of 3,3'-Dimethylbenzidine?

For 3,3'-Dimethylbenzidine, Upstream Products: 2-Iodotoluene, 2-Nitrotoluene, 4,4'-diaminobiphenyl-3,3'-dicarboxylic acid; Downstream Products: N,N'-(3,3'-Dimethyl-4,4'-biphenyldiyl)bis(3-oxobutanamide), 3,3'-Dimethylbiphenyl, N-(2-Methylphenyl)benzamide.

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. "3,3'-Dimethylbenzidine (CAS 119-93-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1408214-0 (accessed 2026-11-06).

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