|SULFUR TRIOXIDE||ICSC: 1202|
|CAS #: 7446-11-9||Sulphuric (acid) anhydride
| UN #: 1829
| EINECS #: 231-197-3
|ACUTE HAZARDS||PREVENTION||FIRE FIGHTING|
|FIRE & EXPLOSION||Not combustible. Heating will cause rise in pressure with risk of bursting. Gives off irritating or toxic fumes (or gases) in a fire. Risk of fire and explosion on contact with bases, combustible substances, reducing agents or water.||NO contact with bases, combustible substances, reducing agents or water.||NO hydrous agents. NO water. In case of fire in the surroundings, use appropriate extinguishing media. In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water.|
|PREVENT GENERATION OF MISTS! AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!|
|SYMPTOMS||ACUTE HAZARDS||FIRST AID|
|Inhalation||Burning sensation. Cough. Laboured breathing. Sore throat. Wheezing. Shortness of breath.||Use ventilation, local exhaust or breathing protection.||Fresh air, rest. Half-upright position. Refer for medical attention.|
|Skin||Redness. Serious skin burns. Pain. Blisters.||Protective gloves. Protective clothing.||Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention .|
|Eyes||Redness. Pain. Blurred vision. Severe deep burns.||Wear face shield or eye protection in combination with breathing protection.||First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.|
|Ingestion||Abdominal pain. Burning sensation. Nausea. Shock or collapse.||Do not eat, drink, or smoke during work.||Refer for medical attention . Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink.|
|SPILLAGE DISPOSAL||CLASSIFICATION & LABELLING|
|Evacuate danger area! Consult an expert! Personal protection: chemical protection suit including self-contained breathing apparatus. Ventilation. NEVER direct water jet on liquid. Do NOT let this chemical enter the environment. Do NOT absorb in saw-dust or other combustible absorbents. Absorb remaining liquid in dry sand or inert absorbent. Then store and dispose of according to local regulations.||
According to UN GHS Criteria
|Store only if stabilized. Separated from food and feedstuffs and incompatible materials. See Chemical Dangers. Dry. Store between 17°C and 25°C.|
|Do not transport with food and feedstuffs.
|SULFUR TRIOXIDE||ICSC: 1202|
|PHYSICAL & CHEMICAL INFORMATION|
Physical State; Appearance
|EXPOSURE & HEALTH EFFECTS|
Routes of exposure
Effects of short-term exposure
Effects of long-term or repeated exposure
|Occupational exposure limits|
|The substance is harmful to aquatic organisms.|
|NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water.
When the alpha form melts it takes the gamma form, and vapor pressure rises dramatically with a hazard of explosion.
Melting point is 62, 33 and 17°C for alpha, beta and gamma forms.
Vapour pressure is 9.7, 45.9 and 57.7 kPa at 25°C for alpha, beta and gamma forms.
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See Also: Toxicological Abbreviations