C3H10ClNO3S
175.64 g/mol
Food AdditiveWarning
L-Cysteine hydrochloride monohydrate
CAS7048-04-6
Category
Food Additive
Compound Class
Amine
Primary Use
flavor enhancer and nutritional supplement
L-Cysteine hydrochloride monohydrate is a salt and hydrate form of the amino acid L-cysteine. It is commonly used as a flavor enhancer and nutritional supplement in food products, and also appears in personal care formulations.
flavor enhancernutritional supplementpersonal care ingredient
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
Cysteine hydrochloride
CAS52-89-1
dough conditioner and nutritional supplement
StrongSame Parent
L-Cysteine
CAS52-90-4
Flavor and nutrition additive
ReferenceSame Category
Citrulline malate
CAS70796-17-7
anti-fatigue compound
ReferenceSame Category
L-histidine zwitterion
CAS71-00-1
nutritional supplement and dietary additive
ReferenceSame Category
Disodium glycyrrhizate
CAS71277-79-7
Food and cosmetic additive
ReferenceSame Category
Sodium lactate
CAS72-17-3
Food acidity regulator and preservative
Referencestereoisomer of
D-cysteine zwitterion
CAS921-01-7
research compound
Referencestereoisomer of
DL-Cysteine hydrochloride monohydrate
CAS96998-61-7
research compound
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
H302Harmful if swallowed
Customs Tariff Classification
The international HS code for L-Cysteine hydrochloride monohydrate (CAS 7048-04-6) 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
(2R)-2-amino-3-sulfanylpropanoic acid;hydrate;hydrochloride
InChIKey
QIJRTFXNRTXDIP-JIZZDEOASA-N
SMILES
C([C@@H](C(=O)O)N)S.O.Cl
Synonyms (43)
- Cysteine hydrochloride (USP)
- Cysteine hydrochloride monohydrate, European Pharmacopoeia (EP)
- L-Cysteine hydrochloride monohydrate, USP grade
- L-Cysteine hydrochloride monohydrate, from non-animal source, cell culture tested, meets EP, USP testing specifications
- L-Cysteine hydrochloride, United States Pharmacopeia (USP)
- Cysteine HCl
- Cysteine hydrochloride
- Elcys (TN)
- H-Cys-OH.HCl.H2O
- L-CYSTEINE HCl MONOHYDRATE
- L-CYSTEINE MONOHYDROCHLORIDE
- L-Cys-OH.HCl.H2O
- L-Cysteine HCl hydrate
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