2-Amino-4-chloro-3-hydroxybenzoic acid CAS 23219-33-2
| CAS No. | 23219-33-2 |
| Molecular Formula | C7H6ClNO3 |
| Molecular Weight | 187.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C7H6ClNO3, 2-Amino-4-chloro-3-hydroxybenzoic acid contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 187.58 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
2-Amino-4-chloro-3-hydroxybenzoic acid (CAS 23219-33-2), molecular formula C7H6ClNO3 and molecular weight 187.58 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 2-Amino-4-chloro-3-hydroxybenzoic 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 | C7H6ClNO3 |
| Molecular Weight | 187.58 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 methanol, ethanol, DMSO, water |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Amino Standards
- 4-Amino-2-chloro-6-methyl-3-nitropyridine (CAS 1026907-18-5)
- 3-Amino-5-chloro-4-hydroxybenzoic acid (CAS 1042055-74-2)
- Methyl 2-amino-4-chloropyrimidine-5-carboxylate (CAS 1353503-49-7)
- Methyl 5-amino-6-chloropyrazine-2-carboxylate (CAS 1378678-66-0)
- Methyl 3-Amino-6-chloropyrazine-2-carboxylate (CAS 1458-03-3)
- 2-Amino-5-chloro-4-methyl-3-nitropyridine (CAS 148612-17-3)
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Recommended Standards
- 2-amino-3-chloro-4-hydroxybenzoic acid (CAS 2167666-47-7)
- 2-Amino-4-methoxypyrimidine-5-carbonyl chloride (CAS 773798-35-9)
- 2-Amino-2-(6-chloropyridazin-3-yl)acetic acid (CAS 2352102-27-1)
- 2-Amino-5-chloro-3-hydroxybenzoic acid (CAS 365462-86-8)
- (1-(1H-imidazol-5-yl)cyclopropyl)methanamine (CAS 1098973-07-9)
- cis-tert-Butyl (4-ethynylcyclohexyl)carbamate (CAS 2352933-18-5)
- [4-(3,5-dimethyl-1h-pyrazol-1-yl)-2-(trifluoromethyl)phenyl]methanamine (CAS 1152815-26-3)
- 3-Chloro-4-fluoro-7-nitro-1H-indazole (CAS 1000340-93-1)
- (R)-1-Amino-2,3-dihydro-1H-indene-4-carbonitrile hydrochloride (CAS 1306763-29-0)
- (2,5-Dimethoxy-1,3-phenylene)dimethanol (CAS 78840-04-7)
- 1-(2-Hydroxy-5-isopropylphenyl)-2-methylpropan-1-one (CAS 934524-36-4)
- 2-(2-Bromo-phenylamino)-thiazole-4-carboxylic acid (CAS 728918-56-7)
- 3-Methylguanine (CAS 2958-98-7)
- Des-Pro31-Tirzepatide (CAS CATO-CPTD788943)
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