Azure A chloride

天青A

Also known as: Azure A, Azure A chloride salt, 3-Amino-7-dimethylaminophenothiazin-5-ium chloride, N-(7-Amino-3H-phenothiazin-3-ylidene)-N-methylmethanaminium chloride, C.I. 52005, Methyleneazure, N,N,N'-Trimethylthionin, 7-(Dimethylamino)-3-imino-3H-phenothiazine Hydrochloride, 7-Amino-N,N-dimethyl-3H-phenothiazin-3-iminium chloride, AZURE A, CERTIFIED, PURE, AZURE A CHLORIDE, AZURE A, FOR MICROSCOPY, AzurA(Macneal)C.I.52005, AzurAForMicroscopy

Azure A chloride (CAS 531-53-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C14H14ClN3S and a molecular weight of 291.80 g/mol. It is also known as Azure A, Azure A chloride salt and 3-Amino-7-dimethylaminophenothiazin-5-ium chloride. Key properties include a melting point of 290 °C (dec.)(lit.), a boiling point of 442.8ºC at 760 mmHg and a flash point of 221.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 531-53-3
Jingsj CID: J-4807-9
Molecular Formula: C₁₄H₁₄ClN₃S
Chinese Name: 天青A
Molecular Weight: 291.80 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	290 °C (dec.)(lit.)
Boiling Point	442.8ºC at 760 mmHg
Flash Point	221.6ºC

Frequently Asked Questions

What is the CAS number of Azure A chloride?

The CAS number of Azure A chloride is 531-53-3.

What are the molecular formula and molecular weight of Azure A chloride?

Azure A chloride has molecular formula C14H14ClN3S and molecular weight 291.80 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. "Azure A chloride (CAS 531-53-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-4807-9 (accessed 2026-10-23).

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