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Propyl Red

丙基红

Also known as: 2-[4-(Dipropylamino)phenylazo]benzoic acid, 2-[(4-Dipropylamino)phenyl]azo-benzoic acid, 2-[[4-(Dipropylamino)phenyl]diazenyl]benzoic acid, 4-(Dipropylamino)azobenzene-2'-carboxylic acid, 4-(2-Carboxyphenylazo)-N,N-dipropylaniline, p-Dipropylaminoazobenzene-o-carboxylic acid, NSC 7803, EINECS 220-140-8, MFCD00041752

Propyl Red (CAS 2641-01-2) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C19H23N3O2 and a molecular weight of 325.40500 g/mol. It is also known as 2-[4-(Dipropylamino)phenylazo]benzoic acid, 2-[(4-Dipropylamino)phenyl]azo-benzoic acid and 2-[[4-(Dipropylamino)phenyl]diazenyl]benzoic acid. Key properties include a melting point of 173-175 °C, a boiling point of 515.8ºC at 760mmHg and a flash point of 265.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
2641-01-2
Jingsj CID
J-1523466-7
Molecular Formula
C19H23N3O2
Chinese Name
丙基红
Molecular Weight
325.40500 g/mol
Category
Organic Compounds
Last updated
8/21/2026

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Physicochemical Properties

Melting Point173-175 °C
Boiling Point515.8ºC at 760mmHg
Flash Point265.7ºC

Frequently Asked Questions

What is the CAS number of Propyl Red?

The CAS number of Propyl Red is 2641-01-2.

What are the molecular formula and molecular weight of Propyl Red?

Propyl Red has molecular formula C19H23N3O2 and molecular weight 325.40500 g/mol.

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

Last updated:

How to cite: Jingsj. "Propyl Red (CAS 2641-01-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1523466-7 (accessed 2026-10-22).

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