C8H8N2OS
180.23 g/mol
APIDanger
5-Methoxy-2-mercaptobenzimidazole
CAS37052-78-1EC253-326-2
Category
API
Compound Class
Heterocycle
Primary Use
Pharmaceutical Raw Material
5-Methoxy-2-mercaptobenzimidazole is a chemical compound used as an active pharmaceutical ingredient impurity. It is characterized by a benzimidazole core with a methoxy group and a thione functional 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.
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Safety Reference
Danger
H302Harmful if swallowed
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H335May cause respiratory irritation
H370Causes damage to organs
H412Harmful to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for 5-Methoxy-2-mercaptobenzimidazole (CAS 37052-78-1) is 2933.99.
HS code (international, 6-digit)
2933.99
EU CN code (8-digit)
2933 99 80
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
5-methoxy-1,3-dihydrobenzimidazole-2-thione
InChIKey
KOFBRZWVWJCLGM-UHFFFAOYSA-N
SMILES
COC1=CC2=C(C=C1)NC(=S)N2
Synonyms (35)
- Esomeprazol EP Impurity A(Omeprazole EP Impurity A)
- OMEPRAZOLE IMPURITY A (EP IMPURITY)
- OMEPRAZOLE MAGNESIUM IMPURITY A (EP IMPURITY)
- Omeprazole EP Impurity A; Esomeprazole EP Impurity A
- 5-Methoxy-2-benzimidazolthiol
- Esomeprazole Impurity 18
- OMEPRAZOLE IMPURITY A
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