دی اکسید سلنیوم کد 800653 مرک

دی اکسید سلنیوم کد 800653 مرک Selenium dioxide 800653 Merck CAS # EC Number Hill Formula Chemical Formula Molar Mass 7446-08-4 231-194-7 O₂Se SeO₂ 110.96g/mol Pricing Availability Catalogue Number Availability Packaging Qty/Pack Price Quantity 8006530005 In Stock Glass bottle 5 g EUR 21.60 Login to See Your Pricing Check Availability Add To Favorites 8006530050 In Stock Glass bottle 50 g EUR 33.70 Login to See Your Pricing Check Availability Add To Favorites 8006530250 In Stock Glass bottle 250 g EUR 116.00 Login to See Your Pricing Check Availability Add To Favorites 8006531000 In Stock Glass bottle 1 kg EUR 404.00 Login to See Your Pricing Check Availability Add To Favorites Add To Cart Description Catalogue Number 800653 Synonyms Selenious anhydride, Selenium(IV) oxide Product Information CAS number 7446-08-4 EC index number 034-002-00-8 EC number 231-194-7 Hill Formula O₂Se Chemical formula SeO₂ Molar Mass 110.96g/mol HS Code 2811 29 90 Quality Level MQ200 Physicochemical Information Density 3.95g/cm3 (20C) Melting Point 340C pH value 2 (10g/l, H₂O, 20C) Vapor pressure <1Pa (20C) Solubility 1353g/l Toxicological Information LD 50 oral LD50 Rat 68.1 mg/kg Safety Information according to GHS Hazard Pictogram(s) Hazard Statement(s) H301 + H331: Toxic if swallowed or if inhaled. H373: May cause damage to organs through prolonged or repeated exposure. H410: Very toxic to aquatic life with long lasting effects. Precautionary Statement(s) P273: Avoid release to the environment. P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. P314: Get medical advice/ attention if you feel unwell. P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician. Signal Word Danger RTECS VS8575000 Storage class 6.1 D Non combustible, acute toxicity cat. 3 / toxic or substances with chronic effects WGK WGK 2 obviously hazardous to water Disposal 17 Inorganic selenium compounds are toxic and must be handled with caution. Container E. Elemental selenium can be recovered by first oxidizing the salts in aqueous solution with concentrated Nitric acid (Cat.No. 100443). The addition of Sodium hydrogen sulfite solution (Item No. 806356) then causes elemental selenium to precipitate out. Aqueous phase: Container D. Safety Information Hazard Symbols Dangerous for the environment Toxic Categories of danger toxic, dangerous for the environment R Phrase R 23/25-33-50/53 Toxic by inhalation and if swallowed.Danger of cumulative effects.Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. S Phrase S 20/21-28-45-60-61 When using do not eat, drink or smoke.After contact with skin, wash immediately with plenty of soap and water.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).This material and its container must be disposed of as hazardous waste.Avoid release to the environment. Refer to special instructions/ Safety data sheets. Storage and Shipping Information Storage Store below +30C. Transport Information Declaration (railroad and road) ADR, RID UN 3283 , 6.1, III Declaration (transport by air) IATA-DGR UN 3283 , 6.1, III Declaration (transport by sea) IMDG-Code UN 3283 , 6.1, III Specifications Assay (gravimetrically) 98.0%