N,N-Dimethyl-4-[(2-methylphenyl)diazenyl]aniline

2'-甲基-4-二甲氨基偶氮苯

Also known as: 4-(Dimethylamino)-2'-methylazobenzene, 2'-Methyl-4-(dimethylamino)azobenzene, N,N-Dimethyl-4-(o-tolylazo)aniline, 2-Methyl-4-dimethylaminoazobenzene, N,N-Dimethyl-4-[(2-methylphenyl)diazenyl]aniline

N,N-Dimethyl-4-[(2-methylphenyl)diazenyl]aniline (CAS 3731-39-3) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C15H17N3 and a molecular weight of 239.31600 g/mol. It is also known as 4-(Dimethylamino)-2'-methylazobenzene, 2'-Methyl-4-(dimethylamino)azobenzene and N,N-Dimethyl-4-(o-tolylazo)aniline. Key properties include a melting point of 74ºC, a boiling point of 390.9ºC at 760mmHg, a density of 1.01g/cm3 and a flash point of 190.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
3731-39-3
Jingsj CID
J-38117-0
Molecular Formula
C15H17N3
Chinese Name
2'-甲基-4-二甲氨基偶氮苯
Molecular Weight
239.31600 g/mol
Category
Aromatic Hydrocarbons
Last updated
8/21/2026

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Physicochemical Properties

Melting Point74ºC
Boiling Point390.9ºC at 760mmHg
Density1.01g/cm3
Flash Point190.2ºC

Frequently Asked Questions

What is the CAS number of N,N-Dimethyl-4-[(2-methylphenyl)diazenyl]aniline?

The CAS number of N,N-Dimethyl-4-[(2-methylphenyl)diazenyl]aniline is 3731-39-3.

What are the molecular formula and molecular weight of N,N-Dimethyl-4-[(2-methylphenyl)diazenyl]aniline?

N,N-Dimethyl-4-[(2-methylphenyl)diazenyl]aniline has molecular formula C15H17N3 and molecular weight 239.31600 g/mol.

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

Last updated:

How to cite: Jingsj. "N,N-Dimethyl-4-[(2-methylphenyl)diazenyl]aniline (CAS 3731-39-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-38117-0 (accessed 2026-10-24).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.