CAS Registry Number

CAS 7134-05-6 — 4-Hydroxy-2-methylbenzenesulfonic acid hydrate

4-Hydroxy-2-methylbenzenesulfonic acid hydrate is an organic sulfonic acid derivative used primarily as a precursor in pharmaceutical synthesis, dye manufacturing, and as a reagent in chemical research. It appears as a white to off-white crystalline solid, soluble in water and polar organic solvents. This chemical has a CAS number of 7134-05-6, with the molecular formula CH3C6H3(OH)SO3H · H2O and a molecular weight of 188.20. It is stored at ambient conditions and carries a **Danger** signal word due to its hazardous properties. Molekula supplies 4-Hydroxy-2-methylbenzenesulfonic acid hydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.