|SULFUR TRIOXIDE||ICSC: 1202|
|Sulphuric (acid) anhydride|
|CAS #: 7446-11-9|
| UN #: 1829
|EC Number: 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!|
|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.
|All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.|
See Also: Toxicological Abbreviations