4-Hydroxy-3-mercaptobenzaldehyde CAS 166590-53-0
| CAS No. | 166590-53-0 |
| Molecular Formula | C7H6O2S |
| Molecular Weight | 154.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 154.19 g/mol gives 4-Hydroxy-3-mercaptobenzaldehyde distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 4-Hydroxy-3-mercaptobenzaldehyde (CAS 166590-53-0), a certified reference material (molecular formula C7H6O2S, MW 154.19 g/mol) for analytical method development and quality control.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 4-Hydroxy-3-mercaptobenzaldehyde is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 154.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), 4-Hydroxy-3-mercaptobenzaldehyde 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 | C7H6O2S |
| Molecular Weight | 154.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2004 |
| Sulfur Atoms | 1 |
Related Hydroxy Standards
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Recommended Standards
- Triallylphosphine (CAS 16523-89-0)
- 5-cyclopropyl-1,3,4-thiadiazole-2-carbaldehyde (CAS 1889645-23-1)
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- (1H-Pyrazolo[4,3-d]thiazol-5-yl)methanamine (CAS 933690-37-0)
- 3-Methyl-4-nitro-1-(2,2,2-trifluoroethyl)-1h-pyrazole (CAS 1245772-08-0)
- (4-Ethyl-5-formyl-1H-pyrrol-2-yl)boronic acid (CAS 1450981-95-9)
- 1-(2-Methylpropyl)-2-nitrobenzene (CAS 19370-33-3)
- H-Leu-Gly-Oet (CAS 53375-57-8)
- (R)-Methyl 3-cyclopentyl-2-(((trifluoromethyl)sulfonyl)oxy)propanoate (CAS 1174013-25-2)
- 2-Chloro-n-{[(2-chlorophenyl)carbamoyl]methyl}-n-methylacetamide (CAS 733031-13-5)
- (S)-1-(5-Bromo-4-methylpyridin-2-yl)ethanamine hydrochloride (CAS 1628810-35-4)
- 3-(4-methoxyphenyl)isonicotinic acid (CAS 1258618-34-6)
- 5,7-Dichloro-N-(3-chlorophenyl)thiazolo[4,5-d]pyrimidine-2-sulfonamide (CAS 1000576-36-2)
- Semaglutide Impurity 13 (CAS CATO-C4X-222613)
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