4-Hydroxy-3-methylbenzenesulfonic Acid CAS 7134-04-5
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 7134-04-5 |
| Molecular Formula | C7H8O4S |
| Molecular Weight | 188.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Hydroxy-3-methylbenzenesulfonic Acid (CAS 7134-04-5) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C7H8O4S. Molecular weight: 188.20 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C7H8O4S |
| Molecular Weight | 188.20 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
| Sulfur Atoms | 1 |
Related Hydroxy Standards
- 2-Hydroxy-5-methylbenzenesulfonic Acid (CAS 7134-06-7)
- 19813-55-9 Methyl 3-hydroxy-5-methoxy-2-thiophenecarboxylate methyl 3-hydroxy-5-methoxythiophene-2-carboxylate (CAS 19813-55-9)
- 2-Hydroxy-4-methylbenzenesulfonic acid (CAS 22356-80-5)
- 4-hydroxy-2-methylbenzenesulfonic acid (CAS 7134-05-6)
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Recommended Standards
- 4-Fluoro-2-(pyridin-3-yl)benzenamine (CAS 923293-16-7)
- 4-Hydroxybenzenesulfonohydrazide (CAS 5907-00-6)
- 4-fluoro-1H-indazole-3-carboxylic acid (CAS 885521-64-2)
- 4-Hydroxy-1-[2-(trifluoromethyl)phenyl]-1h-pyrazole-3-carbohydrazide (CAS 957014-21-0)
- 5-{[(4-methoxyphenyl)methyl]amino}-2,3-dihydro-1H-1,3-benzodiazol-2-one (CAS 884993-54-8)
- 1-(5-Methyl-1H-pyrazol-1-yl)ethan-1-one (CAS 114906-08-0)
- Methyl 5-bromo-4-cyano-2-hydroxybenzoate (CAS 1804381-61-0)
- 4-Bromo-1-(difluoromethyl)-1H-pyrazol-3-amine (CAS 1342073-67-9)
- 4,6-Dimethyl-3-(phenylsulfonyl)pyridin-2-yl 2,3,6-trifluorobenzoate (CAS 338953-81-4)
- Pancreatic Polypeptide (rat) (CAS 90419-12-8)
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