Acid Yellow 40

酸性黄40

Also known as: Acid Yellow 40, C.I. Acid Yellow 40, C.I. 18950, Polar Yellow, PolarR Yellow, Polar Yellow 5G, Bucacid yellow 3g, KI402, Benzyl fast yellow gr, Benzenesulfonic acid,5-chloro-2-[4,5-dihydro-3-methyl-4-[2-[4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]diazenyl]-5-oxo-1H-pyrazol-1-yl]-,sodium salt (1:1)

Acid Yellow 40 (CAS 6372-96-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C23H18ClN4NaO7S2 and a molecular weight of 584.98400 g/mol. It is also known as C.I. Acid Yellow 40, C.I. 18950 and Polar Yellow. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 6372-96-9
Jingsj CID: J-1028363-3
Molecular Formula: C₂₃H₁₈ClN₄NaO₇S₂
Chinese Name: 酸性黄40
Molecular Weight: 584.98400 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of Acid Yellow 40?

The CAS number of Acid Yellow 40 is 6372-96-9.

What are the molecular formula and molecular weight of Acid Yellow 40?

Acid Yellow 40 has molecular formula C23H18ClN4NaO7S2 and molecular weight 584.98400 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Acid Yellow 40 (CAS 6372-96-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1028363-3 (accessed 2026-10-25).

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