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Sulfuric anhydride(7446-11-9)

Sulfuric anhydride(7446-11-9)
Product IdentificationBack to Contents
【Product Name】

Sulfuric anhydride
【Synonyms】

Oxosulfane dioxide
Sulfuric anhydride
【CAS】

7446-11-9
【Formula】

O3S
【Molecular Weight】

80.05
【EINECS】

231-197-3
【RTECS】

WT4830000
【RTECS Class】

Tumorigen; Human Data
【Merck】

12,9152
【Beilstein/Gmelin】

1448 (G)
Physical and Chemical PropertiesBack to Contents
【Appearance】

A colorless to white crystalline solid.
【Solubility in water】

Reacts
【Melting Point】

17.7
【Boiling Point】

44.8
【Vapor Pressure】

643.7 (41.4 C)
【Density】

1.97 g/cm3 (20 C)
【Usage】

Intermediate in sulfuric acid manufacture, in sulfonations for formation of addition compound with amines, in the manufacture of explosives.
【Vapor Density】

2.76
First Aid MeasuresBack to Contents
【Ingestion】

Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
【Inhalation】

Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
【Skin】

Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Discard contaminated clothing in a manner which limits further exposure. Destroy contaminated shoes.
【Eyes】

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).
Handling and StorageBack to Contents
【Storage】

Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Store at around 20 C.
【Handling】

Wash thoroughly after handling. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Use with adequate ventilation. Wash clothing before reuse. Discard contaminated shoes.
Hazards IdentificationBack to Contents
【Ingestion】

May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
【Inhalation】

May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. Causes chemical burns to the respiratory tract.
【Skin】

Causes skin burns.
【Eyes】

Causes eye burns.
【Hazards】

May ignite combustibles (wood, paper, oil, clothing, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases. Flammable/toxic gases may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.)Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. Substance may be transported in a molten form.
【UN (DOT)】

1829
Exposure Controls/Personal ProtectionBack to Contents
【Personal Protection】

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
【Respirators】

A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
【Poison Class】

2
Fire Fighting MeasuresBack to Contents
【Fire Fighting】

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Material will not burn. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Reacts with steam to form corrosive, toxic fumes of sulfuric acid. Extinguishing media: Do NOT use water directly on fire. Do NOT get water inside containers. Cool containers with flooding quantities of water until well after fire is out. In case of fire, use carbon dioxide, dry chemical, or water fog.
【Fire Potential】

May burn but does not ignite readily.
Accidental Release MeasuresBack to Contents
【Small spills/leaks】

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation. Use water spray to reduce vapors, do not put water directly on leak, spill area or inside container.
Stability and ReactivityBack to Contents
【Incompatibilities】

Chlorates, lead oxide, nitrates, cyanides (e.g. potassium cyanide, sodium cyanide), sulfides (inorganic, e.g. ferric sulfide, lead sulfide, sodium sulfide), carbides, diphenylmercury, fulminates, picrates, dioxygen difluoride, white phosphorus, nitryl chloride, barium oxide.
【Stability】

Stable under normal temperatures and pressures.
【Decomposition】

Oxides of sulfur.
【Combustion Products】

Fire will produce irritating, corrosive and/or toxic gases. Reaction with water may generate much heat which will increase the concentration of fumes in the air.
Transport InformationBack to Contents
【UN Number】

1829
【Hazard Class】

8
【Packing Group】

I
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