Description Catalogue Number 105091 Synonyms Potassium persulfate Product Information CAS number 7727-21-1 EC index number 016-061-00-1 EC number 231-781-8 Hill Formula K₂O₈S₂ Molar Mass 270.32 g/mol HS Code 2833 40 00 Applications Application Potassium peroxodisulfate for analysis EMSURE®. CAS 7727-21-1, pH 3.2 (50 g/l, H₂O, 20 °C). Physicochemical Information Density 2.48 g/cm3 (20 °C) Melting Point 100 °C (decomposition) pH value 3.2 (50 g/l, H₂O, 20 °C) Bulk density 1150 kg/m3 Solubility 50 g/l Toxicological Information LD 50 oral LD50 Rat 802 mg/kg Safety Information according to GHS Hazard Pictogram(s) Hazard Statement(s) H272: May intensify fire; oxidizer. H302: Harmful if swallowed. H315: Causes skin irritation. H317: May cause an allergic skin reaction. H319: Causes serious eye irritation. H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled. H335: May cause respiratory irritation. Precautionary Statement(s) P280: Wear protective gloves. P302 + P352: IF ON SKIN: Wash with plenty of soap and water. P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P342 + P311: If experiencing respiratory symptoms: Call a POISON CENTER/doctor. Signal Word Danger RTECS SE0400000 Storage class 5.1B Oxidizing hazardous materials WGK WGK 1 slightly water endangering Disposal 22 Inorganic peroxides and oxidants as well as bromine and iodine should be rendered harmless by reduction with acidic sodium thiosulfate solution (Cat. No. 106513); container D or E. Slightly soluble oxidants should be collected separately in container E or I. Safety Information Hazard Symbols Harmful Oxidising Categories of danger oxidizing, harmful, irritant, sensitizing R Phrase R 8-22-36/37/38-42/43 Contact with combustible material may cause fire.Harmful if swallowed.Irritating to eyes, respiratory system and skin.May cause sensitisation by inhalation and skin contact. S Phrase S 22-24-26-37 Do not breathe dust.Avoid contact with skin.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable gloves. Storage and Shipping Information Storage Store at +5°C to +30°C. Transport Information Declaration (railroad and road) ADR, RID UN 1492 , 5.1, III Declaration (transport by air) IATA-DGR UN 1492 , 5.1, III Declaration (transport by sea) IMDG-Code UN 1492 , 5.1, III Specifications Assay (iodometric) ≥ 99.0 % Chloride (Cl) ≤ 0.001 % Heavy metals (as Pb) ≤ 0.003 % Fe (Iron) ≤ 0.001 % Mn (Manganese) ≤ 0.0001 %