D-Cysteine hydrochloride monohydrate

D-半胱氨酸盐酸盐一水合物

Also known as: H-D-Cys-OH·HCl·H2O, D-Cys·HCl·H2O, D-Cysteine hydrochloride hydrate (1:1:1), (2R)-2-amino-3-sulfanylpropanoic acid hydrochloride hydrate

D-Cysteine hydrochloride monohydrate (CAS 207121-46-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C3H8ClNO2S and a molecular weight of 157.61900 g/mol. It is also known as H-D-Cys-OH·HCl·H2O, D-Cys·HCl·H2O and D-Cysteine hydrochloride hydrate (1:1:1). Key properties include a melting point of -185ºC (dec.), a boiling point of 293.9ºC at 760 mmHg and a flash point of 131.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
207121-46-8
Jingsj CID
J-1115121-2
Molecular Formula
C3H8ClNO2S
Chinese Name
D-半胱氨酸盐酸盐一水合物
Molecular Weight
157.61900 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point-185ºC (dec.)
Boiling Point293.9ºC at 760 mmHg
Flash Point131.5ºC

Frequently Asked Questions

What is the CAS number of D-Cysteine hydrochloride monohydrate?

The CAS number of D-Cysteine hydrochloride monohydrate is 207121-46-8.

What are the molecular formula and molecular weight of D-Cysteine hydrochloride monohydrate?

D-Cysteine hydrochloride monohydrate has molecular formula C3H8ClNO2S and molecular weight 157.61900 g/mol.

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

Last updated:

How to cite: Jingsj. "D-Cysteine hydrochloride monohydrate (CAS 207121-46-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1115121-2 (accessed 2026-10-25).

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