4-Cyano-3-hydroxybenzoic acid CAS 220542-03-0
| CAS No. | 220542-03-0 |
| Molecular Formula | C8H5NO3 |
| Molecular Weight | 163.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 4-Cyano-3-hydroxybenzoic acid (CAS 220542-03-0), a certified reference material (molecular formula C8H5NO3, MW 163.13 g/mol) for analytical method development and quality control.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 4-Cyano-3-hydroxybenzoic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 163.13 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.
Physical & Chemical Properties
| Molecular Formula | C8H5NO3 |
| Molecular Weight | 163.13 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2020 |
| Nitrogen Atoms | 1 |
Related Cyano Standards
- 5-Cyano-2-hydroxybenzoic acid (CAS 10435-57-1)
- 3-Cyano-5-hydroxybenzoic acid (CAS 1163141-57-8)
- 2-Cyano-3-hydroxybenzoic acid (CAS 1243282-67-8)
- 2-Cyano-4-hydroxybenzoic acid (CAS 1243363-28-1)
- 2-Cyano-5-hydroxybenzoic acid (CAS 1243372-21-5)
- (2E)-2-Cyano-3-(furan-3-yl)prop-2-enoic acid, E (CAS 1446140-97-1)
- (E)-2-Cyano-3-(furan-2-yl)acrylic acid (CAS 73403-29-9)
- 2-Cyano-3-(furan-2-yl)prop-2-enoic acid (CAS 6332-92-9)
Recommended Standards
- 4-Cyano-2-hydroxybenzoic Acid (CAS 4691-71-8)
- 4-Ethynyl-2-nitrophenol (CAS 70239-81-5)
- 4-Amino-3-nitrobenzonitrile (CAS 6393-40-4)
- 4-hydroxy-2,3-dihydro-1H-isoindole-1,3-dione (CAS 41709-87-9)
- (S)-N-Methyl-N-(pyrrolidin-2-ylmethyl)acetamide (CAS 1354001-97-0)
- 898788-75-5 1-(2,3-Dichlorophenyl)-3-phenylpropan-1-one DTXSID60643992 (CAS 898788-75-5)
- 2-Amino-N-(3-hydroxybutyl)acetamide hydrochloride (CAS 1220037-43-3)
- 2-(Thiophen-2-yl)cyclopropane-1-carboxylic acid (CAS 90111-23-2)
- Methyl 2-chloro-6-fluoro-3-methoxybenzoate (CAS 1379356-16-7)
- 5-(Cyclohexyloxy)-2-(methylamino)phenol (CAS 1243457-94-4)
- Pazopanib Impurity 56 (CAS CATO-C4X-172556)
- Quinolin-4-ylmethanol hydrobromide (CAS 142910-39-2)
- tert-Butyl 2-(hydroxymethyl)-4H,5H,6H,7H-thieno[3,2-c]pyridine-5-carboxylate (CAS 165947-56-8)
- D-Phe6-Tirzepatide (CAS CATO-CPTD788925)
Why CATO?
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