ICSC 1447 - OLEUM

[List of Chemicals] [Risk Notes] [Risk Phrases] [Safety Phrases] [Danger Symbols]

OLEUM

ICSC: 1447
_{October 2002}

Sulfuric acid, fuming
Disulphuric acid
Dithionic acid
Pyrosulfuric acid
Mixture of sulfuric acid and sulfur trioxide

CAS No: 8014-95-7
RTECS No: WS5605000
UN No: 1831
EC No: 016-019-00-2

H₂SO₄.O₃S
Molecular mass: See Notes

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	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.	C Symbol R: 14-35-37 S: (1/2-)26-30-45 Note: B UN Hazard Class: 8 UN Subsidiary Risks: 6.1 UN Pack Group: I	Unbreakable packaging; put breakable packaging into closed unbreakable container. Airtight. Do not transport with food and feedstuffs.

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.

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 20°C.

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	ENVIRONMENTAL DATA
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 20°C (air = 1): 1.01-1.3	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 (% SO₃): 138°C (20% ), 116°C (30%), 60°C (65%). Melting points (% SO₃): 2°C (20%), 21°C (30%), 5°C (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.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2002

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Updated by AS. Approved by EC. Last update: 21.03.2003