5-Chlorothiophene-2-carbohydrazide CAS 351983-31-8
| CAS No. | 351983-31-8 |
| Molecular Formula | C5H5ClN2OS |
| Molecular Weight | 176.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
5-Chlorothiophene-2-carbohydrazide (CAS 351983-31-8) is a high-purity analytical reference standard with the molecular formula C5H5ClN2OS and a molecular weight of 176.62 g/mol.
Structurally, 5-Chlorothiophene-2-carbohydrazide (C5H5ClN2OS) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 176.62 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures 5-Chlorothiophene-2-carbohydrazide under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H5ClN2OS |
| Molecular Weight | 176.62 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chlorothiophene Standards
- 4-Chlorothiophene-2-carbohydrazide (CAS 1263212-33-4)
- 3-Chlorothiophene-2-carbohydrazide (CAS 478483-31-7)
- Methyl 2-chlorothiophene-3-carboxylate (CAS 76360-42-4)
- Methyl 3-chlorothiophene-2-carboxylate (CAS 88105-17-3)
- Methyl 4-chlorothiophene-3-carboxylate (CAS 88770-14-3)
- 5-Chlorothiophene-2-carbothioamide (CAS 85347-12-2)
- 5-Chlorothiophene-2,4-dicarbaldehyde (CAS 65762-93-8)
- methyl 4-chlorothiophene-2-carboxylate (CAS 88105-19-5)
Recommended Standards
- 5-Chloro-4-methylthiophene-2-carboxylic acid (CAS 74598-03-1)
- 6-Chloro-4-hydroxy-2-(methylthio)pyrimidine (CAS 6632-63-9)
- 5-Chloro-3-methylthiophene-2-carboxylic acid (CAS 91505-28-1)
- 5-Chloro-2-(methylthio)pyrimidin-4-ol (CAS 61044-94-8)
- 8-(3-((Tetrahydro-2H-pyran-4-yl)amino)piperidin-1-yl)-[1,2,4]triazolo[4,3-a]pyrazin-3-ol (CAS 1326872-84-7)
- 6,7-Dihydro-5H-pyrrolo[1,2-a]imidazole-3-carbonyl chloride (CAS 914637-87-9)
- 1-(Fluoromethyl)-4-nitro-1H-pyrazole (CAS 1224194-62-0)
- N'-Phenylimidazo[1,2-a]pyridine-6-carbohydrazide (CAS 92150-06-6)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com