1.04864.1000 POTASSIUM DICHROMATE MERCK

Description Catalogue Number 104864 Replaces PX1445-2; PX1445 Synonyms Potassium bichromate, Potassium pyrochromate Product Information CAS number 7778-50-9 EC index number 024-002-00-6 EC number 231-906-6 Grade ACS,ISO,Reag. Ph Eur Hill Formula Cr₂K₂O₇ Chemical formula K₂Cr₂O₇ Molar Mass 294.19 g/mol HS Code 2841 50 00 Quality Level MQ300 Physicochemical Information Boiling point >500 °C (1013 hPa) Density 2.680 g/cm3 (20 °C) Melting Point 390 °C pH value 3.5 - 5.0 (29.4 g/l, H₂O, 25 °C) Bulk density 1250 kg/m3 Solubility 115 g/l Toxicological Information LD 50 oral LD50 Rat 90.5 mg/kg LD 50 dermal LD50 Rat 1170 mg/kg Safety Information according to GHS Hazard Pictogram(s) Hazard Pictogram(s) Hazard Pictogram(s) Hazard Pictogram(s) Hazard Pictogram(s) Hazard Pictogram(s) Hazard Statement(s) H272: May intensify fire; oxidizer. H301: Toxic if swallowed. H312: Harmful in contact with skin. H314: Causes severe skin burns and eye damage. H317: May cause an allergic skin reaction. H330: Fatal if inhaled. H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled. H335: May cause respiratory irritation. H340: May cause genetic defects. H350: May cause cancer. H360FD: May damage fertility. May damage the unborn child. H372: Causes damage to organs through prolonged or repeated exposure if inhaled. H410: Very toxic to aquatic life with long lasting effects. Precautionary Statement(s) P210: Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P260: Do not breathe dust/ fume/ gas/ mist/ vapours/ spray. P280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection. P303 + P361 + P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water. P304 + P340 + P310: IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Signal Word Danger RTECS HX7680000 Storage class 5.1B Oxidizing hazardous materials WGK WGK 3 highly hazardous to water 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 Categories of danger carcinogenic, mutagenic, toxic for reproduction, oxidizing, very toxic, corrosive, sensitizing, dangerous for the environment Storage and Shipping Information Storage Store at +2°C to +30°C. Transport Information Declaration (railroad and road) ADR, RID UN 3086 , 6.1 (5.1), II Declaration (transport by air) IATA-DGR UN 3086 , 6.1 (5.1), II Declaration (transport by sea) IMDG-Code UN 3086 , 6.1 (5.1), II Specifications Assay (iodometric, calc. on dried substance) ≥ 99.9 % Insoluble matter ≤ 0.005 % Chloride (Cl) ≤ 0.001 % Sulfate (SO₄) ≤ 0.005 % Ca (Calcium) ≤ 0.002 % Cu (Copper) ≤ 0.001 % Fe (Iron) ≤ 0.001 % Na (Sodium) ≤ 0.02 % Pb (Lead) ≤ 0.005 % Loss on drying (130 °C) ≤ 0.05 %

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