4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrazine-2-carboxylic acid hydrochloride CAS 2009013-81-2
| CAS No. | 2009013-81-2 |
| Molecular Formula | C7H9N3O2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrazine-2-carboxylic acid hydrochloride.
4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrazine-2-carboxylic acid hydrochloride (CAS 2009013-81-2), molecular formula C7H9N3O2HCl and molecular weight 203.63 g/mol, is a CATO reference standard with documented purity and traceability.
4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrazine-2-carboxylic acid hydrochloride (C7H9N3O2HCl) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H9N3O2 HCl |
| Molecular Weight | 203.63 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 sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Tetrahydropyrazolo Standards
- Ethyl 4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine-2-carboxylate (CAS 1029720-98-6)
- 4-Oxo-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine-2-carboxylic acid (CAS 1029721-02-5)
- Ethyl 4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine-3-carboxylate (CAS 1060814-45-0)
- 1,2,3,9-Tetrahydropyrazolo[1,2-a]indazole (CAS 106662-04-8)
- Ethyl 4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 115931-38-9)
- 4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrimidine-3-carbonitrile (CAS 115931-97-0)
- 4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrimidine hydrochloride (CAS 1159599-92-4)
- Ethyl 4,5,6,7-tetrahydropyrazolo[1,5-a]pyridine-3-carboxylate (CAS 118055-06-4)
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- 4-Bromo-5-fluoro-7-methyl-1H-indole (CAS 1260895-84-8)
- 2-{[3-(1,1,2,2-Tetrafluoroethoxy)anilino]methylene}malononitrile (CAS 1020252-59-8)
- 5α-Pregnan-3α-ol-20-one-17α,21,21,21-d4 (CAS 203805-85-0)
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- 5-((4-Methylpiperazin-1-yl)methyl)thiophene-2-carboxylic acid (CAS 1245806-60-3)
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