C.I. Pigment Red 56

C.I.颜料红56

Also known as: 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-, 3-Hydroxy-4-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-2-naphthalenecarboxylic acid, 4-[(2-methoxy-5-methyl-4-sulfophenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxylic acid, C.I. 15870, Permanent Bordeaux R

C.I. Pigment Red 56 (CAS 25310-96-7) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C19H16N2O7S and a molecular weight of 416.40500 g/mol. It is also known as 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-, 3-Hydroxy-4-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-2-naphthalenecarboxylic acid and 4-[(2-methoxy-5-methyl-4-sulfophenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxylic acid. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 25310-96-7
Jingsj CID: J-1523007-8
Molecular Formula: C₁₉H₁₆N₂O₇S
Chinese Name: C.I.颜料红56
Molecular Weight: 416.40500 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of C.I. Pigment Red 56?

The CAS number of C.I. Pigment Red 56 is 25310-96-7.

What are the molecular formula and molecular weight of C.I. Pigment Red 56?

C.I. Pigment Red 56 has molecular formula C19H16N2O7S and molecular weight 416.40500 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. "C.I. Pigment Red 56 (CAS 25310-96-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1523007-8 (accessed 2026-10-25).

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