3-Mercapto-4-methylbenzoic acid CAS 200720-35-0
| CAS No. | 200720-35-0 |
| Molecular Formula | C8H8O2S |
| Molecular Weight | 168.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-Mercapto-4-methylbenzoic acid 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.
3-Mercapto-4-methylbenzoic acid (CAS 200720-35-0), molecular formula C8H8O2S and molecular weight 168.21 g/mol, is a CATO reference standard with documented purity and traceability.
3-Mercapto-4-methylbenzoic acid (C8H8O2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. 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.
Physical & Chemical Properties
| Molecular Formula | C8H8O2S |
| Molecular Weight | 168.21 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.) | 2014 |
| Sulfur Atoms | 1 |
Related Mercapto Standards
- 3-Mercapto-2,3-dihydrobenzofuran-6-ol (CAS 1039963-37-5)
- 2-Mercapto-4-methylbenzoic acid (CAS 17839-52-0)
- 2-Mercapto-6-methylbenzoic acid (CAS 17839-53-1)
- 3-Mercapto-2-methylbenzoic acid (CAS 188700-62-1)
- 2-Mercapto-4-methoxybenzaldehyde (CAS 294674-98-9)
- 2-Mercapto-5-methylbenzoic acid (CAS 24155-85-9)
- 4-Mercapto-3-methoxybenzaldehyde (CAS 96495-18-0)
- 4-Mercapto-3-methylbenzoic acid (CAS 948833-50-9)
Recommended Standards
- 3-Cyclopropylthiophene-2-carboxylic acid (CAS 29488-33-3)
- 3-Methoxy-2-sulfanylbenzaldehyde (CAS 88791-05-3)
- 3-Cyclopropoxythiophene-2-carbaldehyde (CAS 2314460-52-9)
- 3-methyl-2-sulfanylbenzoic acid (CAS 77149-11-2)
- 1-Bromo-2,4-dimethoxy-5-nitrobenzene (CAS 778599-56-7)
- n-((3-Methylisoxazol-5-yl)methyl)quinoxalin-2-amine (CAS 1281146-80-2)
- 2-(tert-Butyl)-6-(trifluoromethyl)benzo[d]oxazole-7-sulfonyl chloride (CAS 914638-38-3)
- 2-(2-(3,4,5-Trimethoxybenzoyl)hydrazine-1-carbonyl)benzoic acid (CAS 356526-74-4)
- (S)-2-(2-(Hydroxymethyl)pyrrolidin-1-yl)ethanol (CAS 480453-62-1)
- Fasudil Impurity 14 (CAS CATO-C4X-136514)
- 3-(3-Methylphenyl)-N-(4-methylphenyl)-2-(2H-1,2,3,4-tetrazol-5-yl)propanamide (CAS 483993-83-5)
- 1-(2-(4-Chlorophenyl)thiazol-5-yl)-3-(dimethylamino)prop-2-en-1-one (CAS 338414-64-5)
- 2-Chloro-2,4-dimethylpentane (CAS 35951-33-8)
- [D-His]-Semaglutide B (x TFA Salt) (CAS CATO-C4X-2226117)
Why CATO?
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