- Synonyms: 2-Hydroxybenzoic acid - C7H6O3 - M = 138,12 g/mol - CAS [69-72-7] - EINECS-No.: 200-712-3 - Solub. in water: (20 ºC): 2 g/l - Melting point: 158-161 ºC - Boiling point: 211 ºC - Flash pt. 157 ºC - Ignition temp.: 500 ºC - Vapour pressure: (100 ºC) < 1hPa - LD 50 (oral, rat): 891 mg/kg - GHS-signal word: Danger - GHS-H sentences: H302 - H318 - H361d - - GHS-P sentences: P280 - P305+P351+P338 - P310 - P301+P312 - P405 - P501a - Tariff number: 2918 21 00 00 - Applications: synthesis of organic products, manufacture of dyes, analytical chemistry, in pharma industry. SPECIFICATIONS assay (acidimetric, referred to dried sample): 99,0 - 100,5 % assay (HPLC, referred to dried sample): 98,0 - 102,0 % Identification IR: passes test Identification C (EP): passes test Identification B (USP): passes test melting point: 158 - 161 ºC appearance of solution : clear and colourless chlorides (Cl): max. 100 ppm: sulfates (SO4): max. 200 ppm 4-Hydroxybenzoic acid: max. 0,1 % 4-Hydroxyisophtalic: max. 0,05 % phenol: max. 0,02 %: unspecified impurities: max. 0,05 % total impurities: max. 0,2 % residue on ignition: max. 0,05 % loss on drying (over silica gel, 3h): max. 0,5 %