Product Information CAS number 99-96-7 EC number 202-804-9 Hill Formula C₇H₆O₃ Chemical formula 4-(OH)C₆H₄COOH Molar Mass 138.12 g/mol HS Code 2918 29 00 Structure formula Image Applications Application 4-Hydroxybenzoic acid for synthesis. CAS 99-96-7, chemical formula 4-(OH)C₆H₄COOH. Physicochemical Information Ignition temperature >250 °C Melting Point 213 - 216 °C pH value 3.3 (1 g/l, H₂O, 20 °C) Bulk density 600 kg/m3 Solubility 5 g/l Toxicological Information LD 50 oral LD50 Rat > 5000 mg/kg Safety Information according to GHS Hazard Pictogram(s) Hazard Statement(s) H319: Causes serious eye irritation. Precautionary Statement(s) P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Storage class 10 - 13 Other liquids and solids WGK WGK 1 slightly water endangering Disposal 4 Liquid organic acids or solutions should be diluted, if necessary, and carefully neutralized with sodium hydrogen carbonate (Cat. No. 106323) or with sodium hydroxide (Cat. No 106462). Before filling into container D, check the pH with pH universal indicator strips (Cat. No. 109535). Safety Information Hazard Symbols Irritant Categories of danger irritant R Phrase R 36 Irritating to eyes. Storage and Shipping Information Storage Store below +30°C. Specifications Assay (HPLC, area%) ≥ 98.0 % (a/a) Melting range (lower value) ≥ 214 °C Melting range (upper value) ≤ 217 °C Identity (IR) passes test
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