Pigment Yellow 191

颜料黄191

Also known as: PV Fast Yellow HGR, Pigment Brilliant Yellow HGR, C.I. 18795, C.I. Pigment Yellow 191, PY 191, Pyrazolone Yellow HGR, 4-Chloro-2-[[4,5-dihydro-3-methyl-5-oxo-1-(3-sulfophenyl)-1H-pyrazol-4-yl]azo]-5-methylbenzenesulfonic acid calcium salt (1:1), Benzenesulfonic acid, 4-chloro-2-[2-[4,5-dihydro-3-methyl-5-oxo-1-(3-sulfophenyl)-1H-pyrazol-4-yl]diazenyl]-5-methyl-, calcium salt (1:1), UNII-C08B82I20P, MFCD08276661

Pigment Yellow 191 (CAS 129423-54-7) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C17H13CaClN4O7S2 and a molecular weight of 524.96900 g/mol. It is also known as PV Fast Yellow HGR, Pigment Brilliant Yellow HGR and C.I. 18795. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 129423-54-7
Jingsj CID: J-1507203-8
Molecular Formula: C₁₇H₁₃CaClN₄O₇S₂
Chinese Name: 颜料黄191
Molecular Weight: 524.96900 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of Pigment Yellow 191?

The CAS number of Pigment Yellow 191 is 129423-54-7.

What are the molecular formula and molecular weight of Pigment Yellow 191?

Pigment Yellow 191 has molecular formula C17H13CaClN4O7S2 and molecular weight 524.96900 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. "Pigment Yellow 191 (CAS 129423-54-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1507203-8 (accessed 2026-10-25).

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