Name:
Sulfur trioxide stabilized 99%
Synonym:
Sulfan(R); Sulfuric anhydride. Stabilizer is <0.3% dimethyl sulfate. Powerful sulfonating agent. May contain low-melting solid polymer, the formation of which is unavoidable
CAS:
7446-11-9
Section 1 - Chemical Product
MSDS Name:Sulfur trioxide stabilized 99%
Synonym:Sulfan(R); Sulfuric anhydride. Stabilizer is <0.3% dimethyl sulfate. Powerful sulfonating agent. May contain low-melting solid polymer, the formation of which is unavoidable
Synonym:Sulfan(R); Sulfuric anhydride. Stabilizer is <0.3% dimethyl sulfate. Powerful sulfonating agent. May contain low-melting solid polymer, the formation of which is unavoidable
Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
| CAS# | Chemical Name | emsds | EINECS# |
| 7446-11-9 | Sulfur trioxide | 99 | 231-197-3 |
| Hazard Symbols: C Risk Phrases: 14 26 34 |
Section 3 - HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
Reacts violently with water. Very toxic by inhalation. Causes burns.Hygroscopic (absorbs moisture from the air).
Potential Health Effects
Eye:
Causes eye burns.
Skin:
Causes skin burns.
Ingestion:
Causes gastrointestinal tract burns.
Inhalation:
May be fatal if inhaled. Causes chemical burns to the respiratory tract.
Chronic:
Workers chronically exposed to sulfuric acid mists may show various lesions of the skin, tracheobronchitis, stomatitis, conjunctivitis, or gastritis. Occupational exposure to strong inorganic acid mists containing sulfuric acid is carcinogenic to humans.
Reacts violently with water. Very toxic by inhalation. Causes burns.Hygroscopic (absorbs moisture from the air).
Potential Health Effects
Eye:
Causes eye burns.
Skin:
Causes skin burns.
Ingestion:
Causes gastrointestinal tract burns.
Inhalation:
May be fatal if inhaled. Causes chemical burns to the respiratory tract.
Chronic:
Workers chronically exposed to sulfuric acid mists may show various lesions of the skin, tracheobronchitis, stomatitis, conjunctivitis, or gastritis. Occupational exposure to strong inorganic acid mists containing sulfuric acid is carcinogenic to humans.
Section 4 - FIRST AID MEASURES
Eyes: In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Get medical aid immediately.
Skin:
In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Get medical aid immediately. Wash clothing before reuse.
Ingestion:
If swallowed, do NOT induce vomiting. Get medical aid immediately.
If victim is fully conscious, give a cupful of water. Never give anything by mouth to an unconscious person.
Inhalation:
POISON material. If inhaled, get medical aid immediately. Remove victim to fresh air. If not breathing, give artificial respiration.
If breathing is difficult, give oxygen.
Notes to Physician:
Treat symptomatically and supportively.
Skin:
In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Get medical aid immediately. Wash clothing before reuse.
Ingestion:
If swallowed, do NOT induce vomiting. Get medical aid immediately.
If victim is fully conscious, give a cupful of water. Never give anything by mouth to an unconscious person.
Inhalation:
POISON material. If inhaled, get medical aid immediately. Remove victim to fresh air. If not breathing, give artificial respiration.
If breathing is difficult, give oxygen.
Notes to Physician:
Treat symptomatically and supportively.
Section 5 - FIRE FIGHTING MEASURES
General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Reacts with most metals in the presence of moisture, liberating extremely flammable hydrogen gas. Reacts with steam to form corrosive, toxic fumes of sulfuric acid. Approach fire from upwind to avoid hazardous vapors and toxic decomposition products. Strong dehydrating agent, which may cause ignition of finely divided materials on contact. Oxides of sulfur may be produced in fire. SO3 chars many organic substances due to its avidity for water. On contact with wood shavings, the heat produced by dehydration is sufficient to cause fire.
Extinguishing Media:
Do NOT use water directly on fire. Use carbon dioxide or dry chemical. Do NOT get water inside containers.
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Reacts with most metals in the presence of moisture, liberating extremely flammable hydrogen gas. Reacts with steam to form corrosive, toxic fumes of sulfuric acid. Approach fire from upwind to avoid hazardous vapors and toxic decomposition products. Strong dehydrating agent, which may cause ignition of finely divided materials on contact. Oxides of sulfur may be produced in fire. SO3 chars many organic substances due to its avidity for water. On contact with wood shavings, the heat produced by dehydration is sufficient to cause fire.
Extinguishing Media:
Do NOT use water directly on fire. Use carbon dioxide or dry chemical. Do NOT get water inside containers.
Section 6 - ACCIDENTAL RELEASE MEASURES
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Avoid runoff into storm sewers and ditches which lead to waterways.
Clean up spills immediately, observing precautions in the Protective Equipment section. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Do not use combustible materials such as sawdust. Provide ventilation. Do not get water inside containers. Evacuate unnecessary personnel. Approach spill from upwind.
Spills/Leaks:
Avoid runoff into storm sewers and ditches which lead to waterways.
Clean up spills immediately, observing precautions in the Protective Equipment section. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Do not use combustible materials such as sawdust. Provide ventilation. Do not get water inside containers. Evacuate unnecessary personnel. Approach spill from upwind.
Section 7 - HANDLING and STORAGE
Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not allow contact with water. Discard contaminated shoes. Do not breathe vapor. Store absolutely dry. Do not use with metal spatula or other metal items. Use only with adequate ventilation or respiratory protection.
Storage:
Keep from freezing. Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.
Store at around 20C. Store in a suitable container in a dry area above the substances freezing point. Do NOT freeze.
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not allow contact with water. Discard contaminated shoes. Do not breathe vapor. Store absolutely dry. Do not use with metal spatula or other metal items. Use only with adequate ventilation or respiratory protection.
Storage:
Keep from freezing. Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.
Store at around 20C. Store in a suitable container in a dry area above the substances freezing point. Do NOT freeze.
Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
Engineering Controls:
Use explosion-proof ventilation equipment. Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low. Use a corrosion-resistant ventilation system.
Exposure Limits CAS# 7446-11-9: Germany: 0.5 mg/m3 TWA (inhalable fraction, battery manufacture, metal working in a close Russia: 1 mg/m3 TWA CAS# 7664-93-9: United States OSHA: 1 mg/m3 TWA Belgium - TWA: 1 mg/m3 VLE Belgium - STEL: 3 mg/m3 VLE France - VME: 1 mg/m3 VME France - VLE: 3 mg/m3 VLE Germany: 0.5 mg/m3 TWA (inhalable fraction, battery manufacture, metal working in a close Japan: 1 mg/m3 Ceiling Malaysia: 1 mg/m3 TWA Netherlands: 1 mg/m3 MAC Russia: 1 mg/m3 TWA Spain: 1 mg/m3 VLA-ED Spain: 3 mg/m3 VLA-EC Personal Protective Equipment Eyes: Wear chemical splash goggles and face shield.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
A respiratory protection program that meets OSHAs 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant respirator use.
Use explosion-proof ventilation equipment. Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low. Use a corrosion-resistant ventilation system.
Exposure Limits CAS# 7446-11-9: Germany: 0.5 mg/m3 TWA (inhalable fraction, battery manufacture, metal working in a close Russia: 1 mg/m3 TWA CAS# 7664-93-9: United States OSHA: 1 mg/m3 TWA Belgium - TWA: 1 mg/m3 VLE Belgium - STEL: 3 mg/m3 VLE France - VME: 1 mg/m3 VME France - VLE: 3 mg/m3 VLE Germany: 0.5 mg/m3 TWA (inhalable fraction, battery manufacture, metal working in a close Japan: 1 mg/m3 Ceiling Malaysia: 1 mg/m3 TWA Netherlands: 1 mg/m3 MAC Russia: 1 mg/m3 TWA Spain: 1 mg/m3 VLA-ED Spain: 3 mg/m3 VLA-EC Personal Protective Equipment Eyes: Wear chemical splash goggles and face shield.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
A respiratory protection program that meets OSHAs 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant respirator use.
Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
Physical State: Liquid
Color: clear, colorless to pale yellow
Odor: None reported.
pH: Not available.
Vapor Pressure: 433 mm Hg @ 25 deg C
Viscosity: 1.59 cP 30 deg C
Boiling Point: 44.8 deg C @ 760 mm Hg
Freezing/Melting Point: 16.8 deg C
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water: reacts violently with water
Specific Gravity/Density: 1.9224 g/cm3
Molecular Formula: O3S
Molecular Weight: 80.06
Section 10 - STABILITY AND REACTIVITY
Chemical Stability:
Sulfuric acid reacts vigorously, violently or explosively with many organic and inorganic chemicals and with water. Moisture sensitive.
Readily hydrolyzed by moisture. Decomposes in the presence of water or acids to form sulfuric acid.
Conditions to Avoid:
Excess heat, exposure to moist air or water, freezing temperatures, confined spaces.
Incompatibilities with Other Materials:
Water, metals, bases, organic materials.
Hazardous Decomposition Products:
Oxides of sulfur.
Hazardous Polymerization: May occur.
Sulfuric acid reacts vigorously, violently or explosively with many organic and inorganic chemicals and with water. Moisture sensitive.
Readily hydrolyzed by moisture. Decomposes in the presence of water or acids to form sulfuric acid.
Conditions to Avoid:
Excess heat, exposure to moist air or water, freezing temperatures, confined spaces.
Incompatibilities with Other Materials:
Water, metals, bases, organic materials.
Hazardous Decomposition Products:
Oxides of sulfur.
Hazardous Polymerization: May occur.
Section 11 - TOXICOLOGICAL INFORMATION
RTECS#:
CAS# 7446-11-9: WT4830000 CAS# 7664-93-9: WS5600000 LD50/LC50:
Not available.
CAS# 7664-93-9: Draize test, rabbit, eye: 250 ug Severe; Inhalation, mouse: LC50 = 320 mg/m3/2H; Inhalation, mouse: LC50 = 320 mg/m3; Inhalation, rat: LC50 = 510 mg/m3/2H; Inhalation, rat: LC50 = 510 mg/m3; Oral, rat: LD50 = 2140 mg/kg.
Carcinogenicity:
Sulfur trioxide - Not listed by ACGIH, IARC, or NTP.
Sulfuric acid - ACGIH: A2 - Suspected Human Carcinogen (contained in strong inorg California: carcinogen, initial date 3/14/03 (listed as Strong inorgan NTP: Known carcinogen (listed as Strong inorganic acid mists co IARC: Group 1 carcinogen Other:
See actual entry in RTECS for complete information.
CAS# 7446-11-9: WT4830000 CAS# 7664-93-9: WS5600000 LD50/LC50:
Not available.
CAS# 7664-93-9: Draize test, rabbit, eye: 250 ug Severe; Inhalation, mouse: LC50 = 320 mg/m3/2H; Inhalation, mouse: LC50 = 320 mg/m3; Inhalation, rat: LC50 = 510 mg/m3/2H; Inhalation, rat: LC50 = 510 mg/m3; Oral, rat: LD50 = 2140 mg/kg.
Carcinogenicity:
Sulfur trioxide - Not listed by ACGIH, IARC, or NTP.
Sulfuric acid - ACGIH: A2 - Suspected Human Carcinogen (contained in strong inorg California: carcinogen, initial date 3/14/03 (listed as Strong inorgan NTP: Known carcinogen (listed as Strong inorganic acid mists co IARC: Group 1 carcinogen Other:
See actual entry in RTECS for complete information.
Section 12 - ECOLOGICAL INFORMATION
Section 13 - DISPOSAL CONSIDERATIONS
Dispose of in a manner consistent with federal, state, and local regulations.
Section 14 - TRANSPORT INFORMATION
IATA
Shipping Name: SULPHUR TRIOXIDE, INHIBITED
Hazard Class: 8, 6.1
UN Number: 1829
Packing Group: I
IMO
Shipping Name: SULPHUR TRIOXIDE, INHIBITED
Hazard Class: 8
UN Number: 1829
Packing Group: I
RID/ADR
Shipping Name: SULPHUR TRIOXIDE, INHIBITED
Hazard Class: 8
UN Number: 1829
Packing group: I
USA RQ: CAS# 7664-93-9: 1000 lb final RQ; 454 kg final RQ
Section 15 - REGULATORY INFORMATION
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: C
Risk Phrases:
R 14 Reacts violently with water.
R 26 Very toxic by inhalation.
R 34 Causes burns.
Safety Phrases:
S 8 Keep container dry.
S 25 Avoid contact with eyes.
S 36/37/39 Wear suitable protective clothing, gloves
and eye/face protection.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 7446-11-9: 2
CAS# 7664-93-9: 2
Canada
CAS# 7446-11-9 is listed on Canadas DSL List.
CAS# 7664-93-9 is listed on Canadas DSL List.
CAS# 7446-11-9 is listed on Canadas Ingredient Disclosure List.
CAS# 7664-93-9 is listed on Canadas Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 7446-11-9 is listed on the TSCA inventory.
CAS# 7664-93-9 is listed on the TSCA inventory.
