Sourcing Ketoconazole impurity E?
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Atorvastatin tert-butyl ester
pharmaceutical intermediate
Sourcing Ketoconazole impurity E?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Ketoconazole impurity E is a pharmaceutical intermediate used in the manufacturing of the antifungal drug ketoconazole. It is a tosylate ester derivative with a complex dioxolane structure containing dichlorophenyl and imidazole groups.
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 Ketoconazole impurity E (CAS 134071-44-6) is 2934.99.
2934.99
2934 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
[(2R,4R)-2-(2,4-dichlorophenyl)-2-(imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl 4-methylbenzenesulfonate
WAXNIYHZFWRPGS-UTKZUKDTSA-N
CC1=CC=C(C=C1)S(=O)(=O)OC[C@H]2CO[C@](O2)(CN3C=CN=C3)C4=C(C=C(C=C4)Cl)Cl