Benzoyl leuco methylene blue

苄酰基无色亚甲基兰

Also known as: 10-Benzoyl-3,7-bis(dimethylamino)phenothiazine, BLMB, [3,7-Bis(dimethylamino)-10H-phenothiazin-10-yl](phenyl)methanone, Benzoyl Leucomethylene Blue, ai3-17179, Methanone, [3,7-bis(dimethylamino)-10H-phenothiazin-10-yl]phenyl-

Benzoyl leuco methylene blue (CAS 1249-97-4) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C23H23N3OS and a molecular weight of 389.513 g/mol. It is also known as 10-Benzoyl-3,7-bis(dimethylamino)phenothiazine, BLMB and [3,7-Bis(dimethylamino)-10H-phenothiazin-10-yl](phenyl)methanone. Key properties include a melting point of 195ºC, a boiling point of 589.3±50.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 310.2±30.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1249-97-4
Jingsj CID: J-5353-6
Molecular Formula: C₂₃H₂₃N₃OS
Chinese Name: 苄酰基无色亚甲基兰
Molecular Weight: 389.513 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	195ºC
Boiling Point	589.3±50.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	310.2±30.1 °C
Exact Mass	389.156189
PSA	52.09000
LogP	4.83
Vapor Pressure	0.0±1.7 mmHg at 25°C
Refractive Index	1.696

Customs & Trade Information

HS Code	2934300000
Summary	2934300000. other compounds containing in the structure a phenothiazine ring-system (whether or not hydrogenated), not further fused. 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 Benzoyl leuco methylene blue?

The CAS number of Benzoyl leuco methylene blue is 1249-97-4.

What are the molecular formula and molecular weight of Benzoyl leuco methylene blue?

Benzoyl leuco methylene blue has molecular formula C23H23N3OS and molecular weight 389.513 g/mol.

What are the upstream and downstream products of Benzoyl leuco methylene blue?

For Benzoyl leuco methylene blue, Upstream Products: Benzoyl chloride, Leucomethylene blue.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Benzoyl leuco methylene blue (CAS 1249-97-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-5353-6 (accessed 2026-10-28).

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