Promethazine sulfoxide

Also known as: 10-(2-(Dimethylamino)propyl)-10H-phenothiazine 5-oxide, 10-(2-dimethyl-aminopropyl)-phenothiazine sulphoxide, N,N,α-Trimethyl-10H-phenothiazine-10-ethanamine 5-oxide, N,N-dimethyl-1-(5-oxophenothiazin-10-yl)propan-2-amine, N-[2-(Dimethylamino)propyl]phenothiazine S-oxide, Promethazine 5-oxide, Promethazine 5-sulfoxide, Promethazine EP Impurity D, Romergan sulfoxide

Promethazine sulfoxide (CAS 7640-51-9) is a compound in the Sulfur Compounds category listed in the Jingsj chemical database. It has the molecular formula C17H20N2OS and a molecular weight of 300.41900 g/mol. Key properties include a boiling point of 461.6ºC at 760 mmHg, a density of 1.27g/cm3 and a flash point of 233ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 7640-51-9
Jingsj CID: J-1505962-8
Molecular Formula: C₁₇H₂₀N₂OS
Molecular Weight: 300.41900 g/mol
Category: Sulfur Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	461.6ºC at 760 mmHg
Density	1.27g/cm3
Flash Point	233ºC
Exact Mass	300.13000
PSA	42.76000
LogP	4.18560
Refractive Index	1.678
Storage Conditions	Refrigerator

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. 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 Promethazine sulfoxide?

The CAS number of Promethazine sulfoxide is 7640-51-9.

What are the molecular formula and molecular weight of Promethazine sulfoxide?

Promethazine sulfoxide has molecular formula C17H20N2OS and molecular weight 300.41900 g/mol.

What are the upstream and downstream products of Promethazine sulfoxide?

For Promethazine sulfoxide, Upstream Products: Promethazine, Promethazine Hydrochloride, Phenothiazine.

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. "Promethazine sulfoxide (CAS 7640-51-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1505962-8 (accessed 2026-11-06).

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