2-Mercapto-5-methoxybenzimidazole, extra pure >98%
- CAS
- 37052-78-1
- Formula
- C8H8N2OS
- MW
- 180.23 g/mol
ZX-037410
Pharmacopeial Impurities (EP / USP / BP)
Esomeprazole EP Impurity A
Reference StandardIn stock
Esomeprazole EP Impurity A (CAS 37052-78-1) supplier Zemixal. Lab and bulk packs, batch COA, fast global delivery. Catalogue no. ZX-005698.
CAS number37052-78-1
FormulaC8H8N2OS
Molar mass180.23 g/mol
Physical formSolid
HS code38229090
InChIKeyKOFBRZWVWJCLGM-UHFFFAOYSA-N
IUPAC name5-methoxy-1,3-dihydrobenzimidazole-2-thione
About Esomeprazole EP Impurity A
Analytical teams working on Esomeprazole use Esomeprazole EP Impurity A as a qualified comparison standard. For your records (Reference Standard), the material is defined by CAS 37052-78-1, formula C8H8N2OS and molar mass 180.23 g/mol. It is handled as a solid.
Where it is used
- Pharmacopeial method verification
- Impurity profiling
- QC release testing
- ANDA / DMF filings
Storage and safety notes
Classified under GHS with signal word Danger and hazard statements H302, H315, H317 and H319. Read the SDS before first use.
Available as 10 mg, 25 mg, 50 mg, 100 mg and 250 mg. Larger or split packs can be arranged. Each lot travels with a certificate of analysis with characterisation data. Request pricing online and we confirm availability, documentation and freight to your country.
Reference standards for Esomeprazole
See every impurity, metabolite and related compound we list for this API.
Esomeprazole standardsTypical uses
- Pharmacopeial method verification
- Impurity profiling
- QC release testing
- ANDA / DMF filings
Applications
Grade guides
Specifications and identifiers
| Product name | Esomeprazole EP Impurity A |
|---|---|
| Catalogue number | ZX-005698 |
| CAS number | 37052-78-1 |
| Other CAS numbers | 148201-63-2 |
| IUPAC name | 5-methoxy-1,3-dihydrobenzimidazole-2-thione |
| Molecular formula | C8H8N2OS |
| Molar mass | 180.23 g/mol |
| Exact mass | 180.0357 |
| Grade | Reference Standard |
| Physical form | Solid |
| XLogP3 | 1.1 |
| H-bond donors / acceptors | 2 / 2 |
| Topological polar surface area | 65.4 Ų |
| HS code | 38229090 |
| InChIKey | KOFBRZWVWJCLGM-UHFFFAOYSA-N |
| SMILES | COC1=CC2=C(C=C1)NC(=S)N2 |
| PubChem CID | 665603 |
| Synonyms | 1,3-Dihydro-5-methoxy-2H-benzimidazole-2-thione, 2-Mercapto-5-methoxy-1H-benzimidazole, 5-Methoxy-1H-benzimidazole-2-thiol, 2-Mercapto-5-methoxybenzimidazole, 5-Methoxy-2-benzimidazolethiol, Omeprazole Related Compound B (USP), Omeprazole Impurity A, 5-Methoxy-2-mercaptobenzimidazole, 2H-Benzimidazole-2-thione, 1,3-dihydro-5-methoxy-, 5-methoxy-1H-benzo[d]imidazole-2(3H)-thione, 5-methoxy-1H-benzo[d]imidazole-2-thiol, 5-methoxy-1H-1,3-benzodiazole-2-thiol |
Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.
Safety and GHS hazards
Signal word 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
Precautionary statements P260, P261, P264, P264 + P265, P270, P271, P272, P273, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P308 + P316, P319, P321, P330, P332 + P317, P333 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501
Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.
Pack sizes
| 10 mg | Quoted on request | |
| 25 mg | Quoted on request | |
| 50 mg | Quoted on request | |
| 100 mg | Quoted on request | |
| 250 mg | Quoted on request | |
| 500 mg | Quoted on request | |
| 1 g | Quoted on request |
Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.
Questions about Esomeprazole EP Impurity A
Which CAS number identifies Esomeprazole EP Impurity A?
Esomeprazole EP Impurity A is registered under CAS 37052-78-1. You may also see it listed as 1,3-Dihydro-5-methoxy-2H-benzimidazole-2-thione, 2-Mercapto-5-methoxy-1H-benzimidazole, 5-Methoxy-1H-benzimidazole-2-thiol. Our catalogue number for this item is ZX-005698.
What are the formula and molar mass of Esomeprazole EP Impurity A?
For Esomeprazole EP Impurity A, its formula is C8H8N2OS and its molar mass is 180.23 g/mol. The systematic (IUPAC) name is 5-methoxy-1,3-dihydrobenzimidazole-2-thione. InChIKey KOFBRZWVWJCLGM-UHFFFAOYSA-N lets you match it in any structure database.
How is Esomeprazole EP Impurity A used in pharmaceutical QC?
Esomeprazole EP Impurity A is a characterised reference material linked to Esomeprazole. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.
What grade and pack sizes are available for Esomeprazole EP Impurity A?
This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg, 250 mg, 500 mg. Larger quantities and custom packing can be quoted on request.
Which documents come with Esomeprazole EP Impurity A?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship Esomeprazole EP Impurity A to my country?
Yes. Because Esomeprazole EP Impurity A is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.
Other grades with CAS 37052-78-1
More Esomeprazole standards
More in Pharmacopeial Impurities (EP / USP / BP)
Have a list of compounds to price?
Paste up to 200 CAS numbers into Bulk CAS lookup, or send one enquiry for everything in your quote list. We reply with price, lead time and documents.