4,4'-Azobis(4-cyanovaleric acid)

4,4'-偶氮双(4-氰基戊酸)

Also known as: 4,4'-Azobis(4-cyanopentanoic acid), ACPA, ABCPA, ABCVA, Azobis(4-cyanovaleric acid), 4,4'-(Diazene-1,2-diyl)bis(4-cyanopentanoic acid), 4,4'-[(E)-1,2-Diazenediyl]bis(4-cyanopentanoic acid), Pentanoic acid, 4,4'-azobis[4-cyano-, Azocarboxy, NC 25

4,4'-Azobis(4-cyanovaleric acid) (CAS 2638-94-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H16N4O4 and a molecular weight of 280.280 g/mol. It is also known as 4,4'-Azobis(4-cyanopentanoic acid), ACPA and ABCPA. Key properties include a melting point of 118-125 °C (dec.)(lit.), a boiling point of 503.6±50.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 258.3±30.1 °C. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
2638-94-0
Jingsj CID
J-45033-5
Molecular Formula
C12H16N4O4
Chinese Name
4,4'-偶氮双(4-氰基戊酸)
Molecular Weight
280.280 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point118-125 °C (dec.)(lit.)
Boiling Point503.6±50.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point258.3±30.1 °C

GHS Safety & Compliance

FlammableSignal word: Danger

Frequently Asked Questions

What is the CAS number of 4,4'-Azobis(4-cyanovaleric acid)?

The CAS number of 4,4'-Azobis(4-cyanovaleric acid) is 2638-94-0.

What are the molecular formula and molecular weight of 4,4'-Azobis(4-cyanovaleric acid)?

4,4'-Azobis(4-cyanovaleric acid) has molecular formula C12H16N4O4 and molecular weight 280.280 g/mol.

Is 4,4'-Azobis(4-cyanovaleric acid) hazardous?

4,4'-Azobis(4-cyanovaleric acid) has GHS signal word Danger.

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

Last updated:

How to cite: Jingsj. "4,4'-Azobis(4-cyanovaleric acid) (CAS 2638-94-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-45033-5 (accessed 2026-10-24).

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