4-amino-3-sulfo-1,8-naphthalic anhydride

Also known as: 6-amino-1,3-dioxo-1h,3h-benzo[de]isochromene-5-sulfonic acid, 1H,3H-Naphtho[1,8-cd]pyran-5-sulfonic acid, 6-amino-1,3-dioxo-, Naphthalic anhydride, 4-amino-3-sulfo-

4-amino-3-sulfo-1,8-naphthalic anhydride (CAS 6357-99-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H7NO6S and a molecular weight of 293.25200 g/mol. Key property: a density of 1.813g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 6357-99-9
Jingsj CID: J-1449261-6
Molecular Formula: C₁₂H₇NO₆S
Molecular Weight: 293.25200 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Density	1.813g/cm3
Exact Mass	292.99900
PSA	132.14000
LogP	2.64130
Refractive Index	1.773

Customs & Trade Information

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 4-amino-3-sulfo-1,8-naphthalic anhydride?

The CAS number of 4-amino-3-sulfo-1,8-naphthalic anhydride is 6357-99-9.

What are the molecular formula and molecular weight of 4-amino-3-sulfo-1,8-naphthalic anhydride?

4-amino-3-sulfo-1,8-naphthalic anhydride has molecular formula C12H7NO6S and molecular weight 293.25200 g/mol.

What are the upstream and downstream products of 4-amino-3-sulfo-1,8-naphthalic anhydride?

For 4-amino-3-sulfo-1,8-naphthalic anhydride, Upstream Products: 4-Amino-1,8-naphthalic anhydride.

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. "4-amino-3-sulfo-1,8-naphthalic anhydride (CAS 6357-99-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1449261-6 (accessed 2026-11-09).

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