4-Chlorophthalazine-6-carboxylic acid CAS 2168331-87-9
| CAS No. | 2168331-87-9 |
| Molecular Formula | C9H5ClN2O2 |
| Molecular Weight | 208.60 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.
4-Chlorophthalazine-6-carboxylic acid (CAS 2168331-87-9) is a high-purity analytical reference standard with the molecular formula C9H5ClN2O2 and a molecular weight of 208.60 g/mol.
4-Chlorophthalazine-6-carboxylic acid (C9H5ClN2O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures 4-Chlorophthalazine-6-carboxylic acid 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 | C9H5ClN2O2 |
| Molecular Weight | 208.60 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chlorophthalazine Standards
- 1-Chlorophthalazine-6-carboxylic acid (CAS 1416713-30-8)
- Methyl 1-chlorophthalazine-6-carboxylate (CAS 1416713-78-4)
- Methyl 4-chlorophthalazine-6-carboxylate (CAS 1446407-53-9)
- Methyl 4-chlorophthalazine-1-carboxylate (CAS 2092174-96-2)
- 1-Chlorophthalazine-6-carbaldehyde (CAS 1187244-53-6)
- 4-Chlorophthalazine-1-carbonitrile (CAS 124433-95-0)
- 5-Chlorophthalazine (CAS 78032-08-3)
- 6-Chlorophthalazine (CAS 78032-07-2)
Recommended Standards
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- 4-Oxo-4h-chromene-2-carbonyl chloride (CAS 5112-47-0)
- 104488-94-0 N,N-Dimethyl-2-[(E)-1-phenylethylideneamino]ethylamine MFCD00297215 (CAS 104488-94-0)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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