Acid Blue 40

Also known as: Acid Blue 40, C.I. Acid Blue 40, CI 62125, Acid Blue A 2G, Acid Blue AGG, Acid Blue E 2G, Tectilon Blue, Blue A2G, 4-[[4-(acetylamino)phenyl]amino]-1-amino-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid sodium salt

Acid Blue 40 (CAS 6424-85-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C22H16N3NaO6S and a molecular weight of 473.43400 g/mol. Key property: a melting point of 129-132 °C(lit.). No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 6424-85-7
Jingsj CID: J-6164-3
Molecular Formula: C₂₂H₁₆N₃NaO₆S
Molecular Weight: 473.43400 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	129-132 °C(lit.)
Exact Mass	473.06600
PSA	166.87000
LogP	4.45830

Frequently Asked Questions

What is the CAS number of Acid Blue 40?

The CAS number of Acid Blue 40 is 6424-85-7.

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

Acid Blue 40 has molecular formula C22H16N3NaO6S and molecular weight 473.43400 g/mol.

What are the upstream and downstream products of Acid Blue 40?

For Acid Blue 40, Upstream Products: Bromaminic acid, 4'-Aminoacetanilide, 1-amino-4-bromoanthraquinone-2-sulfonic acid sodium salt.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Acid Blue 40 (CAS 6424-85-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6164-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.