Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Sourcing L-CYSTEINE METHYL ESTER HYDROCHLORIDE?
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Diethyl (1-cyano-3-methylbutyl)malonate
pharmaceutical intermediate
Sourcing L-CYSTEINE METHYL ESTER HYDROCHLORIDE?
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L-Cysteine methyl ester hydrochloride is a salt form of the methyl ester derivative of the amino acid cysteine. It serves as a pharmaceutical raw material, primarily utilized in the synthesis of peptide-based compounds and other active pharmaceutical ingredients due to its reactive thiol group.
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.
The international HS code for L-CYSTEINE METHYL ESTER HYDROCHLORIDE (CAS 18598-63-5) is 2930.90.
2930.90
2930 90 16
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
methyl (2R)-2-amino-3-sulfanylpropanoate;hydrochloride
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COC(=O)[C@H](CS)N.Cl