Product ID:SULFUR DIOXIDE
MSDS Date:Jan 24 1989
MSDS Number: EEEOL
Kit Part:=== Responsible Party ===
Company Name:MATHESON TRI-GAS, INC.
Address:959 ROUTE 46 EAST
City:PARSIPPANY
State:NJ
ZIP:07054-0624
Country:US
Info Phone Num:(USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)
780-471-4036
Chemtrec Ind/Phone:18004249300

Telephone: (USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)

SULFUR DIOXIDE

CAS: 7446-09-5

Fraction By Weight: 100.0%

Reports of Carcinogenicity:NTP:No IARC:No OSHA:No
Health Hazards Acute and Chronic:INHALATION: SHORT TERM EXPOSURE:
allergic reactions, burns, nausea, vomiting, stomach pain, chest
pain, difficulty breathing, bluish skin color, lung damage,
convulsions LONG TERM EXPOSURE: wheezing, lung damage SKIN CONTACT:
SHORT TERM EXPOSURE: burns LONG TERM EXPOSURE: same as effects
reported in short term exposure EYE CONTACT: SHORT TERM EXPOSURE:
burns, tearing, blindness LONG TERM EXPOSURE: same as effects
reported in short term exposure INGESTION: SHORT TERM EXPOSURE: no
information on significant adverse effects LONG TERM EXPOSURE: no
information on significant adverse effects
Medical Cond Aggravated by Exposure:

First Aid: INHALATION: If adverse effects occur, remove to
uncontaminated area. Give artificial respiration if not breathing.
If breathing is difficult, oxygen should be administered by
qualified personnel. Get immediate medical attention. SKIN CONTACT:
Wash skin with soap and water for at least 15 minutes while
removing contaminated clothing and shoes. Get immediate medical
attention. Thoroughly clean and dry contaminated clothing and shoes
before reuse. Destroy contaminated shoes. EYE CONTACT: Immediately
flush eyes with plenty of water for at least 15 minutes. Then get
immediate medical attention. INGESTION: If a large amount is
swallowed, get medical attention. NOTE TO PHYSICIAN: For
inhalation, consider oxygen.

Extinguishing Media:carbon dioxide, regular dry chemical Large fires:
Use regular foam or flood with fine water spray.
Fire Fighting Procedures:Move container from fire area if it can be
done without risk. Cool containers with water spray until well
after the fire is out. Stay away from the ends of tanks. Keep
unnecessary people away, isolate hazard area and deny entry.
Unusual Fire/Explosion Hazard:Negligible fire hazard.

Spill Release Procedures:Stop leak if possible without personal risk.
Reduce vapors with water spray. Do not get water directly on
material. Keep unnecessary people away, isolate hazard area and
deny entry. Stay upwind and keep out of low areas. Ventilate closed
spaces before entering. Evacuation radius: 150 feet. Notify Local
Emergency Planning Committee and State Emergency Response
Commission for release greater than or equal to RQ (U.S. SARA
Section 304). If release occurs in the U.S. and is reportable under
CERCLA Section 103, notify the National Response Center at
(800)424-8802 (USA) or (202)426-2675 (USA).
Neutralizing Agent:

Handling and Storage Precautions:Store and handle in accordance with
all current regulations and standards. Protect from physical
damage. Store outside or in a detached building. Store in a
well-ventilated area. Keep separated from incompatible substances.
Notify State Emergency Response Commission for storage or use at
amounts greater than or equal to the TPQ (U.S. EPA SARA Section
302). SARA Section 303 requires facilities storing a material with
a TPQ to participate in local emergency response planning (U.S. EPA
40 CFR 355.30).
Other Precautions:

Respiratory Protection:The following respirators and maximum use
concentrations are drawn from NIOSH and/or OSHA. 20 ppm Any
chemical cartridge respirator with cartridge(s) providing
protection against this substance. Any supplied-air respirator. 50
ppm Any supplied-air respirator. Any powered, air-purifying
respirator with cartridge(s) providing protection against this
substance. 100 ppm Any chemical cartridge respirator with a full
facepiece and cartridge(s) providing protection against this
substance. Any air-purifying respirator with a full facepiece and a
canister providing protection against this substance. Any powered,
air-purifying respirator with a full facepiece and cartridge(s)
providing protection against this substance. Any supplied-air
respirator with a full facepiece. Any self-contained breathing
apparatus with a full facepiece. Any supplied-air respirator with a
full facepiece. Escape - Any air-purifying respirator with a full
facepiece and a canister providing protection against this
substance. Any appropriate escape-type, self-contained breathing
apparatus. For Unknown Concentrations or Immediately Dangerous to
Life or Health - Any supplied-air respirator with full facepiece
and operated in a pressure-demand or other positive-pressure mode
in combination with a separate escape supply. Any self-contained
breathing apparatus with a full facepiece.
Ventilation:Provide local exhaust or process enclosure ventilation
system. Ensure compliance with applicable exposure limits.
Protective Gloves:Wear insulated gloves.
Eye Protection:Wear splash resistant safety goggles with a faceshield.
Provide an emergency eye wash fountain and quick drench shower in
the immediate work area.
Other Protective Equipment:For the gas: Wear appropriate chemical
resistant clothing. For the liquid: Wear appropriate protective,
cold insulating clothing.
Supplemental Safety and Health
SULFUR DIOXIDE: 2 ppm (5 mg/m3) OSHA TWA (vacated by 58 FR 35338, June
30, 1993) 5 ppm (13 mg/m3) OSHA STEL (vacated by 58 FR 35338, June
30, 1993) 5 ppm (13 mg/m3) OSHA TWA 2 ppm ACGIH TWA 5 ppm ACGIH
STEL 2 ppm (5 mg/m3) NIOSH recommended TWA 10 hour(s) 5 ppm (13
mg/m3) NIOSH recommended STEL

Boiling Pt:14 F (-10 C)
Melt/Freeze Pt:-99 F (-73 C)
Vapor Pres:2432 mmHg @ 20 C
Vapor Density:2.26
Spec Gravity:1.462 @ -10 C
pH:acidic in solution
Evaporation Rate & Reference:>1 (butyl acetate=1)
Solubility in Water:22.8% @ 0 C
Appearance and Odor:PHYSICAL STATE:gas COLOR:colorless ODOR:irritating
odor
Corrosion Rate:

Stability Indicator/Materials to Avoid:Stable at normal temperatures
and pressure.
Stability Condition to Avoid:Minimize contact with material. Containers
may rupture or explode if exposed to heat.
Hazardous Decomposition Products:Thermal decomposition products: oxides
of sulfur Thermal decomposition products: oxides of sulfur
Conditions to Avoid Polymerization:Will not polymerize.

Waste Disposal Methods:Dispose in accordance with all applicable
regulations.

Toxicological Information:SULFUR DIOXIDE: IRRITATION DATA: 6 ppm/4
hour(s) eyes-rabbit mild TOXICITY DATA: 2520 ppm/1 hour(s)
inhalation-rat LC50 CARCINOGEN STATUS: IARC: Human Inadequate
Evidence, Animal Limited Evidence, Group 3; ACGIH: A4 -Not
Classifiable as a Human Carcinogen LOCAL EFFECTS: Corrosive:
inhalation, skin, eye ACUTE TOXICITY LEVEL: Moderately Toxic:
inhalation TARGET ORGANS: immune system (sensitizer) MEDICAL
CONDITIONS AGGRAVATED BY EXPOSURE: respiratory disorders
TUMORIGENIC DATA: Available. MUTAGENIC DATA: Available.
REPRODUCTIVE EFFECTS DATA: Available.

Disclaimer (provided with this information by the compiling agencies):
This information is formulated for use by elements of the Department
of Defense. The United States of America in no manner whatsoever,
expressly or implied, warrants this information to be accurate and
disclaims all liability for its use. Any person utilizing this
document should seek competent professional advice to verify and
assume responsibility for the suitability of this information to their
particular situation.

Ecological:ECOTOXICITY DATA: FISH TOXICITY: 3000 ug/L 0.667-0.833
hour(s) (Avoidance) Atlantic menhaden (Brevoortia tyrannus) ALGAL
TOXICITY: 500 ug/L 6 day(s) (Cellular) Green algae (Rhizoclonium
hieroglyphicum) PHYTOTOXICITY: >=150 ug/L NR hour(s) (Biochemical)
Duckweed (Lemna minor)

Transport Information:U.S. DOT 49 CFR 172.101: PROPER SHIPPING NAME:
Sulfur dioxide ID NUMBER: UN1079 HAZARD CLASS OR DIVISION: 2.3
LABELING REQUIREMENTS: Poison gas; Corrosive QUANTITY LIMITATIONS:
PASSENGER AIRCRAFT OR RAILCAR: Forbidden CARGO AIRCRAFT ONLY: 25 kg

SARA Title III Information: SARA TITLE III SECTION 302 EXTREMELY
HAZARDOUS SUBSTANCES (40 CFR 355.30): SULFUR DIOXIDE: 500LBSTPQ
SARA TITLE III SECTION 304 EXTREMELY HAZARDOUS SUBSTANCES (40 CFR
355.40): SULFUR DIOXIDE: 500LBSRQ SARA TITLE III SARA SECTIONS
311/312 HAZARDOUS CATEGORIES (40 CFR 370.21): ACUTE: Yes
CHRONIC: Yes FIRE: No REACTIVE: No SUDDEN RELEASE: Yes SARA
TITLE III SECTION 313 (40 CFR 372.65): Not regulated.
Federal Regulatory Information:CERCLA SECTIONS 102a/103 HAZARDOUS
SUBSTANCES (40 CFR 302.4): Not regulated. OSHA PROCESS SAFETY
(29CFR1910.119): SULFUR DIOXIDE: 1000LBSTQ
State Regulatory Information: California Proposition 65: Not regulated.