INTOX Home Page
OLEUM ICSC: 1447
Date of Peer Review: October 2002

Sulfuric acid, fuming
Disulphuric acid
Dithionic acid
Pyrosulfuric acid
Mixture of sulfuric acid and sulfur trioxide
CAS # 8014-95-7 H2SO4.O3S
RTECS # WS5605000 Molecular mass: See Notes
UN # 1831
EC # 016-019-00-2
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible. Many reactions may cause fire or explosion. Gives off irritating or toxic fumes (or gases) in a fire.
NO contact with flammable substances. NO contact with base(s), combustibles, reducing agents or water.
NO hydrous agents. NO water. In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION Risk of fire and explosion on contact with base(s), combustible substances, reducing agents or water.

In case of fire: cool drums, etc., by spraying with water but avoid contact of the substance with water.
EXPOSURE
PREVENT GENERATION OF MISTS! AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Burning sensation. Cough. Laboured breathing. Shortness of breath. Sore throat. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. 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.
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 take to a doctor.
Ingestion Abdominal pain. Burning sensation. Nausea. Vomiting. Shock or collapse.
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid. Do NOT absorb in saw-dust or other combustible absorbents. Collect leaking liquid in covered plastic containers. Absorb remaining liquid in dry sand or inert absorbent and remove to safe place. Do NOT let this chemical enter the environment. Chemical protection suit including self-contained breathing apparatus.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Airtight. Do not transport with food and feedstuffs.
EU Classification
Symbol: C
R: 14-35-37
S: (1/2-)-26-30-45
Note: [B]
UN Classification
UN Hazard Class: 8
UN Subsidiary Risks: 6.1
UN Pack Group: I
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-80S1831
NFPA Code: H3; F0; R2; W
Separated from food and feedstuffs, incompatible materials. See Chemical Dangers. Dry. Cool. Ventilation along the floor.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

SEE IMPORTANT INFORMATION ON BACK


OLEUM ICSC: 1447
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO BROWN, FUMING, VISCOUS, OILY, HYGROSCOPIC LIQUID, WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The vapour is heavier than air.

CHEMICAL DANGERS:
The substance decomposes on heating producing toxic and corrosive fumes including sulfur oxides. The substance is a strong oxidant and reacts violently with combustible and reducing materials or organic compounds causing fire and explosion hazard. Reacts violently with water or moist air to produce sulfuric acid. The solution in water is a strong acid, it reacts violently with bases and is corrosive to metals, forming flammable/explosive gas (hydrogen - see ICSC0001).

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
A harmful contamination of the air will be reached quickly on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation of the substance may cause lung oedema (see Notes).

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Lungs may be affected by repeated or prolonged exposure to an aerosol of this substance. Risk of tooth erosion upon repeated or prolonged exposure to an aerosol of this substance. Strong inorganic acid mists containing this substance are carcinogenic to humans.
PHYSICAL PROPERTIES
Boiling point: see Notes
Melting point: see Notes
Relative density (water = 1): 1.9
Solubility in water: miscible, reaction
Vapour pressure, kPa at C: see Notes
Relative vapour density (air = 1): 3-3.3
Relative density of the vapour/air-mixture at 20C (air = 1): 1.01-1.3
ENVIRONMENTAL DATA
The substance is harmful to aquatic organisms.
NOTES
The amount of free sulfur trioxide may vary, which can change the physical properties, and therefore no figure for the molecular weight is given. Boiling points of solutions (% SO_3): 138C (20% ), 116C (30%), 60C (65%). Melting points (% SO_3): 2C (20%), 21C (30%), 5C (65%). The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation is therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water. See ICSC 0362 Sulfuric acid and ICSC 1202 Sulfur trioxide.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 1999
See Also:
        Sulfuric acid (CHEMINFO)
        Sulfuric, acid (ICSC)