5-Chloropyrazine-2-carbothioamide CAS 21279-69-6
| CAS No. | 21279-69-6 |
| Molecular Formula | C5H4ClN3S |
| Molecular Weight | 173.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
5-Chloropyrazine-2-carbothioamide (CAS 21279-69-6) is a high-purity analytical reference standard with the molecular formula C5H4ClN3S and a molecular weight of 173.62 g/mol.
Based on its molecular formula C5H4ClN3S, 5-Chloropyrazine-2-carbothioamide contains a nitrile group, sulfur-containing functionality, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 173.62 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C5H4ClN3S |
| Molecular Weight | 173.62 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) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Chloropyrazine Standards
- 6-Chloropyrazine-2-carbothioamide (CAS 61689-61-0)
- 5-Chloropyrazine-2-carboxylic acid hydrazide (CAS 848952-83-0)
- Methyl 3-Chloropyrazine-2-carboxylate (CAS 27825-21-4)
- 5-chloropyrazine-2,3-dicarbonitrile (CAS 72111-57-0)
- 3-Chloropyrazine-2-carbonyl chloride (CAS 90361-99-2)
- 3-Chloropyrazine-2,5-dicarbonitrile (CAS 918410-50-1)
- 6-chloropyrazine-2-carbonyl chloride (CAS 148673-71-6)
- 5-chloropyrazine-2-carbonyl chloride (CAS 88625-23-4)
Recommended Standards
- 4-Chloro-2-fluoro-N,N-dimethylaniline (CAS 914635-85-1)
- 3-Chloro-4-fluoro-N-methylbenzylamine (CAS 381236-43-7)
- N-(2-Chloro-6-fluorobenzyl)-N -methylamine (CAS 62924-64-5)
- 2-Mercaptonicotinoyl chloride (CAS 97936-36-2)
- 4-(3-Amino-4-bromo-1h-pyrazol-1-yl)-N-methylbutanamide (CAS 1339412-35-9)
- 2-(4-Hydroxyphenyl)-4-methylpentan-3-one (CAS 111873-62-2)
- Pyridine-3,4-dicarboxylic Anhydride (CAS 4664-08-8)
- Ethyl 3-fluoro-3'-hydroxy-4'-methyl-[1,1'-biphenyl]-4-carboxylate (CAS 1261934-99-9)
- 2-(3,5-Dimethylpyrazol-1-yl)-4,6-dimethylpyrimidine (CAS 4086-61-7)
- 7-bromo-1H-thieno[3,2-d]pyrimidine-2,4-dione (CAS 41102-02-7)
- N-(pyridin-4-ylmethyl)naphthalene-2-sulfonamide (CAS 324776-06-9)
- 4-(4-Chlorobenzyl)tetrahydro-2H-pyran-4-carboxylic acid (CAS 1405788-24-0)
- (4-Amino-5-bromopyridin-3-yl)methanol (CAS 1806995-45-8)
- Semaglutide Impurity 140 (CAS CATO-C4X-2226140)
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