MATERIAL SAFETY DATA SHEET

SECTION 1     CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
MATHESON TRI-GAS, INC. EMERGENCY CONTACT:
959 ROUTE 46 EAST CHEMTREC 1-800-424-9300
PARSIPPANY, NEW JERSEY USA 07054-0624 OR
530 WATSON STREET INFORMATION CONTACT:
WHITBY, ONTARIO, CANADA L1N 5R9 (USA) 973-257-1100
  (WHITBY) 905-668-3570
  (EDMONTON) 780-471-4036

SUBSTANCE: CHLORODIFLUOROMETHANE

TRADE NAMES/SYNONYMS:
MTG MSDS 41; MONOCHLORODIFLUOROMETHANE; DIFLUOROMONOCHLOROMETHANE; DIFLUOROCHLOROMETHANE; METHANE, CHLORODIFLUORO-; METHANE, MONOCHLORODIFLUORO-; METHANE, DIFLUOROMONOCHLORO-; METHANE, DIFLUOROCHLORO-; ALGEON 22; ALGOFRENE 22; ARCTON 4; ARCTON 22; ELECTRO-CF 22; FORANE 22; FREON 22; FRIGEN 22; REFRIGERANT 22; GENETRON 22; UN 1018; CHCLF2; MAT04760; RTECS PA6390000

CHEMICAL FAMILY: halogenated, aliphatic

CREATION DATE: Jan 24 1989
REVISION DATE: Mar 22 2001

SECTION 2     COMPOSITION, INFORMATION ON INGREDIENTS
COMPONENT: CHLORODIFLUOROMETHANE
CAS NUMBER: 75-45-6
EC NUMBER (EINECS): 200-871-9
PERCENTAGE: 100.0

SECTION 3     HAZARDS IDENTIFICATION
NFPA RATINGS (SCALE 0-4):  HEALTH=2  FIRE=0  REACTIVITY=1

EMERGENCY OVERVIEW:
COLOR: colorless
PHYSICAL FORM: liquefied gas
ODOR: sweet odor
MAJOR HEALTH HAZARDS: central nervous system depression, difficulty breathing
PHYSICAL HAZARDS: Containers may rupture or explode if exposed to heat. May decompose when heated. Releases toxic, corrosive, flammable or explosive gases.

POTENTIAL HEALTH EFFECTS:
INHALATION:
SHORT TERM EXPOSURE: irritation, nausea, vomiting, irregular heartbeat, headache, symptoms of drunkenness, disorientation, suffocation, convulsions, coma
LONG TERM EXPOSURE: same as effects reported in short term exposure
SKIN CONTACT:
SHORT TERM EXPOSURE: blisters, frostbite
LONG TERM EXPOSURE: no information is available
EYE CONTACT:
SHORT TERM EXPOSURE: frostbite, blurred vision
LONG TERM EXPOSURE: no information is available
INGESTION:
SHORT TERM EXPOSURE: ingestion of a gas is unlikely
LONG TERM EXPOSURE: no information is available

CARCINOGEN STATUS:
OSHA: No
NTP: No
IARC: No
SECTION 4     FIRST AID MEASURES
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: If frostbite or freezing occur, immediately flush with plenty of lukewarm water (105-115 F; 41-46 C). DO NOT USE HOT WATER. If warm water is not available, gently wrap affected parts in blankets. Get immediate medical attention.

EYE CONTACT: Contact with liquid: 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.

SECTION 5     FIRE FIGHTING MEASURES
FIRE AND EXPLOSION HAZARDS: Negligible fire hazard. Containers may rupture or explode if exposed to heat.

EXTINGUISHING MEDIA: carbon dioxide, regular dry chemical

Large fires: Use regular foam or flood with fine water spray.

FIRE FIGHTING: 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. Withdraw immediately in case of rising sound from venting safety device or any discoloration of tanks due to fire. For tank, rail car or tank truck, evacuation radius: 800 meters (1/2 mile).

FLASH POINT: none, TOC
AUTOIGNITION: 1170 F (632 C)

SECTION 6     ACCIDENTAL RELEASE MEASURES
OCCUPATIONAL RELEASE:
Stop leak if possible without personal risk. Keep unnecessary people away, isolate hazard area and deny entry. Stay upwind and keep out of low areas.

SECTION 7     HANDLING AND STORAGE
STORAGE: Store and handle in accordance with all current regulations and standards. Subject to storage regulations: U.S. OSHA 29 CFR 1910.101. Store in a tightly closed container. Store in a cool, dry place. Store in a well-ventilated area. Keep separated from incompatible substances. Store below 52 C.

SECTION 8     EXPOSURE CONTROLS, PERSONAL PROTECTION
EXPOSURE LIMITS:
CHLORODIFLUOROMETHANE:
1000 ppm (3540 mg/m3) OSHA TWA (vacated by 58 FR 35338, June 30, 1993)
1000 ppm ACGIH TWA
1000 ppm (3500 mg/m3) NIOSH recommended TWA 10 hour(s)
1250 ppm (4375 mg/m3) NIOSH recommended STEL

VENTILATION: Provide local exhaust ventilation system. Ensure compliance with applicable exposure limits.

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.

CLOTHING: For the gas: Protective clothing is not required. For the liquid: Wear appropriate protective, cold insulating clothing.

GLOVES: Wear insulated gloves.

PROTECTIVE MATERIAL TYPES: neoprene, polyvinyl alcohol (PVA), Viton(R)

RESPIRATOR: Under conditions of frequent use or heavy exposure, respiratory protection may be needed. Respiratory protection is ranked in order from minimum to maximum. Consider warning properties before use.
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.

SECTION 9     PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE: gas
APPEARANCE: clear
COLOR: colorless
PHYSICAL FORM: liquefied gas
ODOR: sweet odor
MOLECULAR WEIGHT: 86.47
MOLECULAR FORMULA: C-H-CL-F2
BOILING POINT: -42 F (-41 C)
FREEZING POINT: -256 to -231 F (-160 to -146 C)
DECOMPOSITION POINT: >500 F (>260 C)
VAPOR PRESSURE: 7120 mmHg @ 21 C
VAPOR DENSITY (air=1): 3.11
SPECIFIC GRAVITY (water=1): 3.87 @ 0 C
WATER SOLUBILITY: 0.3% @ 25 C
PH: neutral
VOLATILITY: 100 % by weight
ODOR THRESHOLD: Not available
EVAPORATION RATE: Not applicable
VISCOSITY: 0.0122 cP @ 0 C
COEFFICIENT OF WATER/OIL DISTRIBUTION: Not applicable
SOLVENT SOLUBILITY:
Soluble: ether, acetone, chloroform, hydrocarbons, ketones, esters, organic acids
Insoluble: glycols, glycerol, phenols, castor oils

SECTION 10    STABILITY AND REACTIVITY
REACTIVITY: May decompose on contact with heat and/or storage and use above room temperature. Releases toxic, corrosive, flammable or explosive gases.

CONDITIONS TO AVOID: Protect from physical damage and heat. Containers may rupture or explode if exposed to heat.

INCOMPATIBILITIES: bases, metals, oxidizing materials

HAZARDOUS DECOMPOSITION:
Thermal decomposition products: halogenated compounds, oxides of carbon, hydrochloric acid, chlorine, phosgene

POLYMERIZATION: Will not polymerize.

SECTION 11    TOXICOLOGICAL INFORMATION
CHLORODIFLUOROMETHANE:
TOXICITY DATA:
35 pph/15 minute(s) inhalation-rat LC50
CARCINOGEN STATUS: IARC: Human Inadequate Evidence, Animal Limited Evidence, Group 3; ACGIH: A4 -Not Classifiable as a Human Carcinogen
ACUTE TOXICITY LEVEL:
Relatively Non-toxic: inhalation
TARGET ORGANS: central nervous system
MUTAGENIC DATA: Available.
REPRODUCTIVE EFFECTS DATA: Available.
ADDITIONAL DATA: Stimulants such as epinephrine may induce ventricular fibrillation.

SECTION 12    ECOLOGICAL INFORMATION
FATE AND TRANSPORT:
KOW: 15135.61 (log = 4.18) (estimated from water solubility)
KOC: 8472.27 (log = 3.93) (estimated from water solubility)
HENRY'S LAW CONSTANT: 2.7 E -1 atm-m3/mol
BIOCONCENTRATION: 6.78 (estimated from water solubility)
AQUATIC PROCESSES: 2.4125735 hours (River Model: 1 m deep, 1 m/s flow, 3 m/s wind)

ENVIRONMENTAL SUMMARY:
Relatively non-persistent in the environment. Not expected to leach through the soil or the sediment. Accumulates very little in the bodies of living organisms. Highly volatile from water.

SECTION 13    DISPOSAL CONSIDERATIONS
Dispose in accordance with all applicable regulations.

SECTION 14    TRANSPORT INFORMATION
U.S. DOT 49 CFR 172.101:
PROPER SHIPPING NAME: Chlorodifluoromethane or Refrigerant gas R 22
ID NUMBER: UN1018
HAZARD CLASS OR DIVISION: 2.2
LABELING REQUIREMENTS: Nonflammable gas

SECTION 15    REGULATORY INFORMATION
U.S. REGULATIONS:
CERCLA SECTIONS 102a/103 HAZARDOUS SUBSTANCES (40 CFR 302.4): Not regulated.

SARA TITLE III SECTION 302 EXTREMELY HAZARDOUS SUBSTANCES (40 CFR 355.30): Not regulated.

SARA TITLE III SECTION 304 EXTREMELY HAZARDOUS SUBSTANCES (40 CFR 355.40): Not regulated.

SARA TITLE III SARA SECTIONS 311/312 HAZARDOUS CATEGORIES (40 CFR 370.21):
ACUTE: Yes
CHRONIC: No
FIRE: No
REACTIVE: No
SUDDEN RELEASE: Yes

SARA TITLE III SECTION 313 (40 CFR 372.65):
CHLORODIFLUOROMETHANE

OSHA PROCESS SAFETY (29CFR1910.119): Not regulated.

STATE REGULATIONS:
California Proposition 65: Not regulated.

CANADIAN REGULATIONS:
WHMIS CLASSIFICATION: A.

EUROPEAN REGULATIONS:
EC CLASSIFICATION (CALCULATED): Not determined.

NATIONAL INVENTORY STATUS:
U.S. INVENTORY (TSCA): Listed on inventory.

TSCA 12(b) EXPORT NOTIFICATION: Not listed.

CANADA INVENTORY (DSL): Not determined.

CANADA INVENTORY (NDSL): Not determined.

SECTION 16    OTHER INFORMATION
MSDS SUMMARY OF CHANGES
SECTION 1 CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
SECTION 3 HAZARDS IDENTIFICATION
SECTION 7 HANDLING AND STORAGE
SECTION 14 TRANSPORT INFORMATION
SECTION 15 REGULATORY INFORMATION

©Copyright 1984-2001 MDL Information Systems, Inc. All rights reserved.

MATHESON TRI-GAS, INC. MAKES NO EXPRESS OR IMPLIED WARRANTIES, GUARANTEES OR REPRESENTATIONS REGARDING THE PRODUCT OR THE INFORMATION HEREIN, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR USE. MATHESON TRI-GAS, INC. SHALL NOT BE LIABLE FOR ANY PERSONAL INJURY, PROPERTY OR OTHER DAMAGES OF ANY NATURE, WHETHER COMPENSATORY, CONSEQUENTIAL, EXEMPLARY, OR OTHERWISE, RESULTING FROM ANY PUBLICATION, USE OR RELIANCE UPON THE INFORMATION HEREIN.