7-Chloro-5-(methylthio)-1H-pyrazolo[4,3-d]pyrimidine CAS 1435806-45-3
| CAS No. | 1435806-45-3 |
| Molecular Formula | C6H5ClN4S |
| Molecular Weight | 200.65 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.
7-Chloro-5-(methylthio)-1H-pyrazolo[4,3-d]pyrimidine (CAS 1435806-45-3), molecular formula C6H5ClN4S and molecular weight 200.65 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C6H5ClN4S, 7-Chloro-5-(methylthio)-1H-pyrazolo[4,3-d]pyrimidine contains a nitrile group, sulfur-containing functionality, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 200.65 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO manufactures 7-Chloro-5-(methylthio)-1H-pyrazolo[4,3-d]pyrimidine 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 | C6H5ClN4S |
| Molecular Weight | 200.65 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.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 3-Chloro-6-(methylthio)-1H-pyrazolo[3,4-d]pyrimidine (CAS 100859-88-9)
- 2-Chloro-5-methoxy-[1,3]thiazolo[5,4-b]pyridine (CAS 1196154-04-7)
- 6-Chloro-2-(methylthio)oxazolo[5,4-b]pyridine (CAS 1206716-60-0)
- 7-Chloro-2-methylthiazolo[5,4-d]pyrimidin-5-amine (CAS 1211584-94-9)
- 2-Chloro-7-methylthieno[3,2-d]pyrimidin-4(1H)-one (CAS 1265593-71-2)
- 4-Chloro-3-(methylthio)-1H-pyrazolo[3,4-d]pyrimidine (CAS 130224-66-7)
- 2-Chloro-6-methylthieno[3,2-d]pyrimidin-4(3H)-one (CAS 1429629-67-3)
- 5-Chloro-2-(methylthio)oxazolo[4,5-b]pyridine (CAS 1783370-92-2)
Recommended Standards
- 2-(Chloromethyl)thieno[3,2-d]pyrimidin-4(3H)-one (CAS 147005-91-2)
- (4-Chlorothieno[3,2-d]pyrimidin-7-yl)methanol (CAS 1318133-02-6)
- 6-Chloro-3-methylimidazo[2,1-b]thiazole-5-carbaldehyde (CAS 178449-63-3)
- 5-(5-chlorothiophen-2-yl)isoxazol-3-amine (CAS 1267318-33-1)
- Methyl 6-fluoro-3-oxo-3,3a-dihydro-2H-indazole-4-carboxylate (CAS 885522-84-9)
- 5-Methoxyisoquinolin-1(2H)-one (CAS 118313-35-2)
- 1-(3-Methoxyphenyl)-2-(4-nitrophenyl)ethan-1-one (CAS 1183106-20-8)
- Ethyl 2-(1-benzyl-1H-imidazol-2-yl)-2-oxoacetate (CAS 1197631-86-9)
- tert-Butyl (1-hydroxy-3-(tetrahydro-2H-pyran-3-yl)propan-2-yl)carbamate (CAS 942144-42-5)
- Methyl 4-oxo-4,9-dihydro-3H-pyrimido[4,5-b]indole-7-carboxylate (CAS 1096471-96-3)
- 1H-Pyrrolo[2,3-b]pyridin-6-ylmethanamine hydrochloride (CAS 1955494-06-0)
- 8-Bromo-2,4-dichloroquinoline (CAS 406204-86-2)
- 2-Bromo-N-(thiazol-2-yl)butanamide (CAS 116200-99-8)
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