3-Chloro-1H-pyrazolo[4,3-d]pyrimidin-5-amine CAS 1935950-46-1
| CAS No. | 1935950-46-1 |
| Molecular Formula | C5H4ClN5 |
| Molecular Weight | 169.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 3-Chloro-1H-pyrazolo[4,3-d]pyrimidin-5-amine (CAS 1935950-46-1), a certified reference material (molecular formula C5H4ClN5, MW 169.57 g/mol) for analytical method development and quality control.
Owing to a nitrile group, chlorine substitution, 3-Chloro-1H-pyrazolo[4,3-d]pyrimidin-5-amine is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 169.57 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 3-Chloro-1H-pyrazolo[4,3-d]pyrimidin-5-amine meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H4ClN5 |
| Molecular Weight | 169.57 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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 |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 5 |
Related Chloro Standards
- 7-chloro-1H-pyrazolo[4,3-d]pyrimidin-5-amine (CAS 1086398-36-8)
- 2-Chloro-4-methoxypyrimidine-5-carbonitrile (CAS 1106295-93-5)
- 3-Chloro-[1,2,4]triazolo[4,3-b]pyridazin-6-amine (CAS 1150888-24-6)
- 7-Chloro-3H-imidazo[4,5-b]pyridine 4-oxide (CAS 115953-98-5)
- 7-Chloro-2-methyloxazolo[5,4-d]pyrimidine (CAS 118767-93-4)
- 3-Chloro-6-(hydroxymethyl)pyrazine-2-carbonitrile (CAS 1257072-48-2)
- 7-Chloro[1,2,4]triazolo[4,3-c]pyrimidin-5-amine (CAS 1306739-68-3)
- 5-Chloro-3-(furan-2-yl)-1H-1,2,4-triazole (CAS 1315346-11-2)
Recommended Standards
- 3-Chloro-1H-pyrazolo[4,3-d]pyrimidin-7-amine (CAS 1935382-01-6)
- 2-Chloro-6-methoxypyrimidine-4-carbonitrile (CAS 1936326-00-9)
- 3-Chloro-1H-pyrazolo[3,4-d]pyrimidin-6-amine (CAS 1934811-21-8)
- 1-Chloropyrrolo[1,2-d][1,2,4]triazin-4(3H)-one (CAS 2171392-87-1)
- 2-Bromo-6-ethylpyrazine (CAS 1086382-92-4)
- 4-(2,4-Difluorophenyl)-3h,4h,5h,6h,7h-imidazo[4,5-c]pyridine-6-carboxylic acid (CAS 1214186-86-3)
- 5-(4-Methoxy-2-methylphenyl)pyridine-3-carboxylic acid (CAS 1261932-60-8)
- 3-((5-Methyl-5H-pyrrolo[3,2-d]pyrimidin-4-yl)oxy)benzoic acid (CAS 919278-71-0)
- 1-(tert-Butyl)-5-(trifluoromethyl)-1H-pyrazole (CAS 1269292-12-7)
- 4-Methyl-1-(3-(methylsulfonyl)propyl)-1h-pyrazol-3-amine (CAS 1342028-94-7)
- (Butan-2-yl)[(4-tert-Butylphenyl)methyl]amine hydrochloride (CAS 1240567-09-2)
- 2,4-Diphenyloxazole-5-carbaldehyde (CAS 917989-01-6)
- ((tert-Butyl)amino)(4-(2-fluorophenyl)piperazinyl)methane-1-thione (CAS 1024126-83-7)
- Peptide Impurity 82 (CAS 10491-78-8)
Why CATO?
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