L-Cysteine methyl ester hydrochloride
Also known as: Methyl cysteine hydrochloride, H-Cys-OMe·HCl, L-Cys-OMe·HCl, Mecysteine hydrochloride, Methyl L-cysteinate hydrochloride, Cysteine methyl ester hydrochloride, Acdrile, Actiol
L-Cysteine methyl ester hydrochloride (CAS 18598-63-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H10ClNO2S and a molecular weight of 171.646 g/mol. Key properties include a melting point of 142 °C (dec.)(lit.), a boiling point of 197.2ºC at 760 mmHg and a flash point of 73.1ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 18598-63-5
- Jingsj CID
- J-14365-7
- Molecular Formula
- C4H10ClNO2S
- Molecular Weight
- 171.646 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 142 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 197.2ºC at 760 mmHg |
| Flash Point | 73.1ºC |
| Exact Mass | 171.012070 |
| PSA | 91.12000 |
| LogP | 0.91880 |
| Vapor Pressure | 0.384mmHg at 25°C |
| Refractive Index | -2.5 ° (C=20, MeOH) |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2930909090 |
|---|---|
| Summary | 2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of L-Cysteine methyl ester hydrochloride?
The CAS number of L-Cysteine methyl ester hydrochloride is 18598-63-5.
What are the molecular formula and molecular weight of L-Cysteine methyl ester hydrochloride?
L-Cysteine methyl ester hydrochloride has molecular formula C4H10ClNO2S and molecular weight 171.646 g/mol.
Is L-Cysteine methyl ester hydrochloride hazardous?
L-Cysteine methyl ester hydrochloride has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of L-Cysteine methyl ester hydrochloride?
For L-Cysteine methyl ester hydrochloride, Downstream Products: Dimethyl L-cystinate, Dimethyl L-cystinate dihydrochloride, benzoic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "L-Cysteine methyl ester hydrochloride (CAS 18598-63-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-14365-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.