Sourcing L-cystine?
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Sourcing L-cystine?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
L-Cystine is the oxidized dimeric form of the amino acid cysteine, appearing as a white solid with low water solubility. In proteins, it provides structural stability through disulfide bonds and participates in redox reactions.
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-cystine (CAS 56-89-3) is 2930.90.
2930.90
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.
(2R)-2-amino-3-[[(2R)-2-amino-2-carboxyethyl]disulfanyl]propanoic acid
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C([C@@H](C(=O)O)N)SSC[C@@H](C(=O)O)N