C3H7NO2S
121.16 g/mol
Research ReagentWarning
D-cysteine
CAS921-01-7EC213-062-0
Category
Research Reagent
Compound Class
Natural Product
Primary Use
Research Compound
D-cysteine is an optically active form of cysteine with a D-configuration. As a research reagent, it is used in laboratory studies involving stereochemistry and peptide synthesis.
Research reagent for stereochemical studiesBuilding block in custom peptide synthesis
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 hydrochloride
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research compound
ReferenceSame Category
FMOC-D-Lys(BOC)-OH
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research compound
ReferenceSame Category
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ReferenceSame Category
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research compound
ReferenceSame Category
5,6-Dihydro-imidazo[4,5,1-jk][1]benzazepine-2,7(1H,4H)-dione
CAS92260-81-6
research compound
Referencestereoisomer of
DL-Cysteine hydrochloride monohydrate
CAS96998-61-7
research compound
Referencestereoisomer of
DL-Cysteine-3,3-d2
CAS124051-54-3
research compound
Referencestereoisomer of
L-Cysteine-d2
CAS130633-02-2
research compound
Safety Reference
Warning
H302Harmful if swallowed
Customs Tariff Classification
The international HS code for D-cysteine (CAS 921-01-7) is 2930.90.
HS code (international, 6-digit)
2930.90
EU CN code (8-digit)
2930 90 13
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
InChIKey
XUJNEKJLAYXESH-UWTATZPHSA-N
SMILES
C([C@H](C(=O)O)N)S
Synonyms (18)
- DCY
- (S)-Cysteine
- 1f57
- CYSTEINE. (S)-
- Cysteine, D-
- D-Amino-3-mercaptopropionate
- D-Cys
- D-Cystein
- D-Cysteine, >=99% (RT)
- D-Zystein
- D-cysteine
- H-D-CYS-OH
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