Cyamemazine
Also known as: Cyamepromazine, 10-[3-(Dimethylamino)-2-methylpropyl]-10H-phenothiazine-2-carbonitrile, RP 7204, Tercian, Cianatil, 7204 RP, FI 6229, TH 2602
Cyamemazine (CAS 3546-03-0) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C19H21N3S and a molecular weight of 323.455 g/mol. Key properties include a boiling point of 479.0±45.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 243.5±28.7 °C. It is classified under GHS with signal word Warning and hazard statements H410 — Very toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 3546-03-0
- Jingsj CID
- J-1980453-6
- Molecular Formula
- C19H21N3S
- Molecular Weight
- 323.455 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 479.0±45.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 243.5±28.7 °C |
| Exact Mass | 323.145630 |
| PSA | 55.57000 |
| LogP | 4.62 |
| Vapor Pressure | 0.0±1.2 mmHg at 25°C |
| Refractive Index | 1.655 |
GHS Safety & Compliance
- H410 — Very toxic to aquatic life with long lasting effects
Activity & Biological Data
| Target | 5-HT2A Receptor:1.5 nM (Ki) 5-HT2C Receptor:12 nM (Ki) 5-HT3 Receptor:75 nM (Ki) |
|---|---|
| Additional Information | [1]. Bourin M, et al. Preclinical and clinical pharmacology of cyamemazine: anxiolytic effects and prevention of alcohol and benzodiazepine withdrawal syndrome. CNS Drug Rev. 2004 Fall;10(3):219-29. [2]. Vendrell-Criado V, et al. Photobehavior of the antipsychotic drug cyamemazine in a supramolecular gel protective environment. J Photochem Photobiol B. 2020 Jan;202:111686. |
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 Cyamemazine?
The CAS number of Cyamemazine is 3546-03-0.
What are the molecular formula and molecular weight of Cyamemazine?
Cyamemazine has molecular formula C19H21N3S and molecular weight 323.455 g/mol.
Is Cyamemazine hazardous?
Cyamemazine has GHS signal word Warning and hazard statements H410 — Very toxic to aquatic life with long lasting effects.
What are the upstream and downstream products of Cyamemazine?
For Cyamemazine, Upstream Products: Phenothiazine-2-carbonitrile, 2-Chlorophenothiazine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Cyamemazine (CAS 3546-03-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1980453-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.