2-Chloro-5-methylthieno[2,3-d]pyrimidine CAS 83259-31-8
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 83259-31-8 |
| Molecular Formula | C7H5ClN2S |
| Molecular Weight | 184.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Chloro-5-methylthieno[2,3-d]pyrimidine (CAS 83259-31-8) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C7H5ClN2S. Molecular weight: 184.65 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C7H5ClN2S |
| Molecular Weight | 184.65 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 4-Chloro-6-methylthieno[2,3-d]pyrimidine (CAS 106691-21-8)
- 5-chloro-1,3-benzothiazol-4-amine (CAS 1087784-64-2)
- 5-chloro-2-methyl-thiazolo[5,4-b]pyridine (CAS 109202-21-3)
- 4-Chloro-6-methylthiazolo[4,5-c]pyridine (CAS 1159829-49-8)
- 5-Chloro-2-methylthiazolo[4,5-b]pyridine (CAS 118872-73-4)
- 2-Chloro-5-methylthiazolo[5,4-b]pyridine (CAS 1190927-27-5)
- 6-Chloro-3-methylisothiazolo[5,4-b]pyridine (CAS 129211-90-1)
- 2-Chloro-7-methylthieno[3,2-d]pyrimidine (CAS 1355963-58-4)
Recommended Standards
- 2-Chloro-4-thiocyanatoaniline (CAS 3226-47-9)
- 2-Chloro-6-methylthiazolo[4,5-b]pyridine (CAS 960535-45-9)
- 2-Chloro-4-methylthieno[3,2-d]pyrimidine (CAS 952435-11-9)
- n-[2-(cyclohex-1-en-1-yl)ethyl]-3,5-dimethyl-1,2-oxazole-4-carboxamide (CAS 717857-92-6)
- Sibutramine Hydrochloride (CAS 84485-00-7)
- 3-cyclopropyl-4-(difluoromethyl)-7-methylisoxazolo[5,4-b]pyridin-6(7H)-one (CAS 1160246-39-8)
- 6-Amino-8-trifluoromethylphenanthridine (CAS 651055-83-3)
- tert-butyl N-[1-(2-oxoethyl)cyclohexyl]carbamate (CAS 1335042-28-8)
- 5-Bromo-1-naphthonitrile (CAS 129278-20-2)
- Semaglutide Impurity 150 xTFA (CAS CATO-C4X-2226150)
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