Description Catalogue Number 100565 Synonyms Orthophosphoric acid, o-Phosphoric acid Description ortho-Phosphoric acid 99% Product Information CAS number 7664-38-2 EC index number 015-011-00-6 EC number 231-633-2 Hill Formula H₃O₄P Chemical formula H₃PO₄ Molar Mass 97.99 g/mol HS Code 2809 20 00 Physicochemical Information Density 1.84 g/cm3 (38 °C) Melting Point 41.1 °C pH value <0.5 (100 g/l, H₂O, 20 °C) Vapor pressure 0.04 hPa (20 °C) Solubility 750 - 850 g/l Toxicological Information LD 50 dermal LD50 Rabbit 2740 mg/kg Safety Information according to GHS Hazard Pictogram(s) Hazard Statement(s) H290: May be corrosive to metals. H314: Causes severe skin burns and eye damage. Precautionary Statement(s) P280: Wear protective gloves/ protective clothing/ eye protection/ face protection. P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician. Signal Word Danger Storage class 8B Non-combustible, corrosive hazardous materials WGK WGK 1 slightly water endangering Disposal 12 Inorganic acids and anhydrides thereof should first be diluted or hydrolyzed by stirring carefully into ice water and then neutralized (protective gloves, fume cupboard!) with sodium hydroxide solution (Cat. No. 105587). Before filling into container D, check the pH with pH universal indicator strips (Cat. No. 109535). Fuming sulfuric acid should be carefully stirred dropwise into 40 % sulfuric acid (Cat. No. 109286). Ensure that plenty of ice is available for cooling! When sufficiently cool, treat the highly concentrated sulfuric acid as described above. Analogous to this procedure, other anhydrides can be converted into their corresponding acids. Acid gases (e.g. hydrogen halide, chlorine, phosgene, sulfur dioxide) can be introduced into dilute sodium hydroxide solution and after neutralization disposed of in container D. Safety Information Hazard Symbols Corrosive Categories of danger corrosive R Phrase R 34 Causes burns. S Phrase S 26-45 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible). Storage and Shipping Information Storage Store below +30°C. Transport Information Declaration (railroad and road) ADR, RID UN 3453 , 8, III Declaration (transport by air) IATA-DGR UN 3453 , 8, III Declaration (transport by sea) IMDG-Code UN 3453 , 8, III, Segregation Group: 1 (Acids) Specifications Assay (acidimetric) ≥ 99 % Identity passes test Chloride (Cl) ≤ 2 ppm Nitrate (NO₃) ≤ 2 ppm Phosphite and Hypophosphite (as H₃PO₃) ≤ 500 ppm Fluoride (F) ≤ 0.5 ppm As (Arsenic) ≤ 1 ppm Ca (Calcium) ≤ 20 ppm Cd (Cadmium) ≤ 1 ppm Co (Cobalt) ≤ 1 ppm Cu (Copper) ≤ 1 ppm Fe (Iron) ≤ 10 ppm K (Potassium) ≤ 5 ppm Mg (Magnesium) ≤ 1 ppm Mn (Manganese) ≤ 1 ppm Na (Sodium) ≤ 50 ppm Ni (Nickel) ≤ 1 ppm Pb (Lead) ≤ 1 ppm Sb (Antimony) ≤ 1 ppm Zn (Zinc) ≤ 1 ppm Volatile acids (as CH₃COOH) ≤ 20 ppm Substances reducing potassium permanganate (as O) ≤ 20 ppm