C3H8ClNO2S
157.62 g/mol
Research ReagentWarning
D-Cysteine hydrochloride
CAS32443-99-5EC251-043-9
Category
Research Reagent
Compound Class
Amine
Primary Use
Research Compound
D-Cysteine hydrochloride is a salt form of the D-isomer of the amino acid cysteine, commonly used as a research compound in biochemical and pharmaceutical studies.
laboratory reagent for researchbuilding block in peptide synthesisreference standard in analytical chemistry
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
StrongSame Parent
D-cysteine zwitterion
CAS921-01-7
research compound
ReferenceSame Category
3,5-Dibromo-2-furancarboxylic acid
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research compound
ReferenceSame Category
3-(3-hydroxyphenyl)-3-hydroxypropionic acid
CAS3247-75-4
research compound
ReferenceSame Category
Trideuterio(deuteriooxy)(113C)methane
CAS32479-98-4
research compound
ReferenceSame Category
3-METHOXYFURAN-2-CARBALDEHYDE
CAS32487-58-4
research compound
Referencestereoisomer of
Cysteine hydrochloride
CAS52-89-1
dough conditioner and nutritional supplement
Referencestereoisomer of
L-Cysteine
CAS52-90-4
Flavor and nutrition additive
Referencestereoisomer of
Cysteine hydrochloride monohydrate
CAS7048-04-6
flavor enhancer and nutritional supplement
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for D-Cysteine hydrochloride (CAS 32443-99-5) is 2930.90.
HS code (international, 6-digit)
2930.90
EU CN code (8-digit)
2930 90 95
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(2S)-2-amino-3-sulfanylpropanoic acid;hydrochloride
InChIKey
IFQSXNOEEPCSLW-HSHFZTNMSA-N
SMILES
C([C@H](C(=O)O)N)S.Cl
Synonyms (12)
- D-CYSTEINE HCL
- D-Cys-OH.HCl
- D-Cysteine hydrochloride
- H-D-Cys-OH H2O HCl
- H-D-Cys-OH HCl H
- H-D-Cys-OH.HCl
- H-D-Cys-OH.HCl.H2O
Sourcing D-Cysteine hydrochloride?
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