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NIOSH

OLEUM

ICSC: 1447

Sulfuric acid, fuming
Disulphuric acid
Dithionic acid
Pyrosulfuric acid
Mixture of sulfuric acid and sulfur trioxide
H2SO4•O3S
Molecular mass: See Notes
ICSC # 1447 		CAS # 8014-95-7
RTECS # WS5605000
UN # 1831
EC # 016-019-00-2
October 10, 2002 Validated

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 orwater.
NO hydrous agents. NO water. In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION Risk of fire and explosion on contact withbase(s),combustible substances,reducing agents orwater.

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

STORAGE

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.
Separated from food and feedstuffs , incompatible materials . See Chemical Dangers. Dry. Cool. Ventilation along the floor.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Airtight. Do not transport with food and feedstuffs.
Note: B
C symbol
R: 14-35-37
S: 1/2-26-30-45
UN Hazard Class: 8
UN Subsidiary Risks: 6.1
UN Packing Group: I
ICSC: 1447 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

OLEUM

ICSC: 1447

I

M

P

O

R

T

A

N

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D

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A

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

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

ENVIRONMENTAL
DATA

The substance is harmful to aquatic organisms.

N O T E S

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.
Transport Emergency Card: TEC (R)-80S1831

NFPA Code: H3; F0; R2; W

ADDITIONAL INFORMATION



ICSC: 1447 OLEUM
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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