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  R32 MSDS
 
 
MATERIAL SAFETY DATA SHEET
R32
 
Company: BEST INC., LIMITED.
Add.: Rooms 1318-20, 13/F Hollywood Plaza, 610 Nathan Road, Mongkok, Kowloon, Hong Kong
Tel: +852-30774337       Fax:+852-30774338
 
 
COMPOSITION / INFORMATION ON INGREDIENTS
 
INGREDIENT NAME            CAS NUMBER         WEIGHT %
Difluoromethane                     75-10-5             100
 
Trace impurities and additional material names not listed above may also appear in Section 15 toward the end of the MSDS. These materials may be listed for local “Right-To-Know” compliance and for other reasons.
 
HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW: Colorless, volatile liquid with ethereal and faint sweetish odor. Non-flammable material. Overexposure may cause dizziness and loss of concentration. At higher levels, CNS depression and cardiac arrhythmia may result from exposure. Vapors displace air and can cause asphyxiation in confined spaces. At higher temperatures, (>250°C), decomposition products may include Hydrofluoric Acid (HF) and carbonyl halides.
 
POTENTIAL HEALTH HAZARDS
SKIN: Irritation would result from a defatting action on tissue. Liquid contact could cause frostbite.
 
EYES: Liquid contact can cause severe irritation and frostbite. Mist may irritate.
 
INHALATION: R-32 is low in acute toxicity in animals. When oxygen levels in air are reduced to 12-14% by displacement, symptoms of asphyxiation, loss of coordination, increased pulse rate and deeper respiration will occur. At high levels, cardiac arrhythmia may occur.
 
INGESTION: Ingestion is unlikely because of the low boiling point of the material. Should it occur, discomfort in the gastrointestinal tract from rapid evaporation of the material and consequent evolution of gas would result. Some effects of inhalation and skin exposure would be expected.
 
DELAYED EFFECTS: None Known
Ingredients found on one of the OSHA designated carcinogen lists are listed below.
 
INGREDIENT NAME             NTP STATUS      IARC STATUS      OSHA LIST
No ingredients listed in this section
 
FIRST AID MEASURES
SKIN: Promptly flush skin with water until all chemical is removed. If there is evidence of frostbite, bathe (do not rub) with lukewarm (not hot) water. If water is not available, cover with a clean, soft cloth or similar covering. Get medical attention if symptoms persist.
 
EYES: Immediately flush eyes with large amounts of water for at least 15 minutes (in case of frostbite, water should be lukewarm, not hot) lifting eyelids occasionally to facilitate irrigation. Get medical attention if symptoms persist.
 
INHALATION: Immediately remove to fresh air. If breathing has stopped, give artificial respiration. Use oxygen as required, provided a qualified operator is available. Get medical attention immediately. DO NOT give epinephrine (adrenaline).
 
INGESTION: Ingestion is unlikely because of the physical properties and is not expected to be hazardous. DO NOT induce vomiting unless instructed to do so by a physician.
 
ADVICE TO PHYSICIAN: Because of the possible disturbances of cardiac rhythm, catecholamine drugs, such as epinephrine, should be used with special caution and only in situations of emergency life support. Treatment of overexposure should be directed at the control of symptoms and the clinical conditions.
 
FIRE FIGHTING MEASURES
FLAMMABLE PROPERTIES
FLASH POINT: Gas, not applicable per DOT regulations
FLASH POINT METHOD: Not applicable
AUTOIGNITION TEMPERATURE: >750°C
UPPER FLAME LIMIT (volume % in air): 33.4%
LOWER FLAME LIMIT (volume % in air): 12.7%
FLAME PROPAGATION RATE (solids): Not applicable
OSHA FLAMMABILITY CLASS: Not applicable
 
EXTINGUISHING MEDIA:
Use any standard agent – choose the one most appropriate for type of surrounding fire.
 
UNUSUAL FIRE AND EXPLOSION HAZARDS:
Contact with certain reactive metals may result in formation of explosive or exothermic reactions under specific conditions (e.g. very high temperatures and/or appropriate pressures).
 
SPECIAL FIRE FIGHTING PRECAUTIONS/INSTRUCTIONS:
Firefighters should wear self-contained, NIOSH-approved breathing apparatus for protection against possible toxic decomposition products. Proper eye and skin protection should be provided. Use water spray to keep fire-exposed containers cool.
 
ACCIDENTAL RELEASE MEASURES
IN CASE OF SPILL OR OTHER RELEASE: (Always wear recommended personal protective equipment.)
Evacuate unprotected personnel. Protected personnel should remove ignition sources and shut off leak, if without risk, and provide ventilation. Unprotected personnel should not return until air has been tested and determined safe, including lowlying areas.
 
Spills and releases may have to be reported to Federal and/or local authorities. See Section 15 regarding reporting requirements.
 
HANDLING AND STORAGE
NORMAL HANDLING: (Always wear recommended personal protective equipment.)
Avoid breathing vapors and liquid contact with eyes, skin or clothing. Do not puncture or drop cylinders, expose them to open flame or excessive heat. Use authorized cylinders only. Follow standard safety precautions for handling and use of compressed gas cylinders.
 
STORAGE RECOMMENDATIONS:
Store in a cool, well-ventilated area of low fire risk and out of direct sunlight. Protect cylinder and its fittings from physical damage. Storage in subsurface locations should be avoided. Close valve tightly after use and when empty.
 
EXPOSURE CONTROLS / PERSONAL PROTECTION
ENGINEERING CONTROLS:
Provide local ventilation at filling zones and areas where leakage is probable. Mechanical (general) ventilation may be adequate for other operating and storage areas.
 
PERSONAL PROTECTIVE EQUIPMENT
SKIN PROTECTION:
Skin contact with refrigerant may cause frostbite. General work clothing and gloves (leather) should provide adequate protection. If prolonged contact with liquid or gas is anticipated, insulated gloves constructed of PVA, neoprene or butyl rubber should be used. Any contaminated clothing should be promptly removed and washed before reuse.
 
EYE PROTECTION:
For normal conditions, wear safety glasses. Where there is reasonable probability of liquid contact, wear chemical safety goggles.
RESPIRATORY PROTECTION:
None generally required for adequately ventilated work situations. For accidental release or non-ventilated situations, or release into confined space, where the concentration may be above the PEL of 1,000 ppm, use a selfcontained, NIOSH approved breathing apparatus or supplied air respirator. For escape: use the former or a NIOSH approved gas mask with organic vapor canister.
 
ADDITIONAL RECOMMENDATIONS:
Where contact with liquid is likely, such as in a spill or leak, impervious boots and clothing should be worn. High dose-level warning signs are recommended for areas of principle exposure. Provide eyewash stations and quickdrench shower facilities at convenient locations. For tank cleaning operations, see OSHA regulations, 29 CFR 1910.132 and 29 CFR 1910.133.
 
EXPOSURE GUIDELINES
INGREDIENT NAME        ACGIH TLV      OSHA PEL       OTHER LIMIT
Difluoromethane               None              None        **1000 ppm TWA (8hr)
 
* = Limit established by National Refrigerants, Inc.
** = Workplace Environmental Exposure Level (AIHA)
*** = Biological Exposure Index (ACGIH)
 
OTHER EXPOSURE LIMITS FOR POTENTIAL DECOMPOSITION PRODUCTS:
Hydrogen Fluoride: ACGIH TLV = 3ppm ceiling
 
PHYSICAL AND CHEMICAL PROPERTIES
APPEARANCE: Clear, colorless liquid and vapor
PHYSICAL STATE: Gas at ambient temperatures
MOLECULAR WEIGHT: 52
CHEMICAL FORMULA: CH2F2
ODOR: Faint ethereal odor
SPECIFIC GRAVITY (water = 1.0): 1.002 @ 26.7°C (80°F)
SOLUBILITY IN WATER (weight %): Unknown
pH: Neutral
BOILING POINT: -51.7°C (-61°F)
FREEZING POINT: -136°C (-212°F)
VAPOR PRESSURE: 220.3 psia @ 70°F
504.8 psia @ 130°F
VAPOR DENSITY (air = 1.0): 1.8
EVAPORATION RATE: >1 COMPARED TO: CC14 = 1
% VOLATILES: 100
FLASH POINT: Not applicable
(Flash point method and additional flammability data are found in Section 5.)
 
STABILITY AND REACTIVITY
NORMALLY STABLE? (CONDITIONS TO AVOID):
The product is stable under normal conditions. Explosions may result if in the flammable range. Any source of high temperatures, such as lighted cigarettes, flames, hot spots or welding may yield toxic and/or corrosive decomposition products.
 
INCOMPATIBILITIES:
(Under specific conditions: e.g. very high temperatures and/or appropriate pressures) – Freshly abraded aluminum surfaces (may cause strong exothermic reaction). Chemically reactive metals: potassium, calcium, powdered aluminum, magnesium, and zinc.
 
HAZARDOUS DECOMPOSITION PRODUCTS:
Halogens, halogen acids and possibly carbonyl halides.
 
HAZARDOUS POLYMERIZATION:
Will not occur.
 
TOXICOLOGICAL INFORMATION
IMMEDIATE (ACUTE) EFFECTS:
LC50 : 4 hr. (rat) - > 520,000 ppm / Cardiac Sensitization NOEL - 350,000 ppm
 
DELAYED (SUBCHRONIC AND CHRONIC) EFFECTS:
Teratogenic NOEL (rat and rabbit) – 50,000 ppm
Subchronic inhalation (rat) NOEL – 50,000 ppm
 
OTHER DATA:
Not active in four genetic tests.
 
ECOLOGICAL INFORMATION
Degradability (BOD): R-32 is a gas at room temperature; therefore, it is unlikely to remain in water.
Octanol Water Partition Coefficient: Not applicable
 
DISPOSAL CONSIDERATIONS
RCRA
Is the unused product a RCRA hazardous waste if discarded? Not a hazardous waste
If yes, the RCRA ID number is: Not applicable
 
OTHER DISPOSAL CONSIDERATIONS:
Disposal must comply with federal, state, and local disposal or discharge laws. R-32 is subject to U.S. Environmental Protection Agency Clean Air Act Regulations Section 608 in 40 CFR Part 82 regarding refrigerant recycling.
 
The information offered here is for the product as shipped. Use and/or alterations to the product such as mixing with other materials may significantly change the characteristics of the material and alter the RCRA classification and the proper disposal method.
TRANSPORT INFORMATION
US DOT HAZARD CLASS: US DOT PROPER SHIPPING NAME: Difluoromethane
US DOT HAZARD CLASS: 2.1
US DOT PACKING GROUP: Not applicable
US DOT ID NUMBER: UN3252
 
For additional information on shipping regulations affecting this material, contact the information number found in Section 1.
 
REGULATORY INFORMATION
TOXIC SUBSTANCES CONTROL ACT (TSCA)
TSCA INVENTORY STATUS: Listed on the TSCA inventory
OTHER TSCA ISSUES: None
 
SARA TITLE III / CERLA
“Reportable Quantities” (RQs) and/or “Threshold Planning Quantities” (TPQs) exist for the following ingredients.
 
INGREDIENT NAME              SARA / CERCLA RQ (lb.)      SARA EHS TPQ (lb.)
No ingredients listed in this section
 
Spills or releases resulting in the loss of any ingredient at or above its RQ requires immediate notification to the National Response Center [(800) 424-8802] and to your Local Emergency Planning Committee.
 
SECTION 311 HAZARD CLASS: FIRE
IMMEDIATE
PRESSURE
 
SARA 313 TOXIC CHEMICALS:
The following ingredients are SARA 313 “Toxic Chemicals”. CAS numbers and weight percents are found in Section 2.
 
INGREDIENT NAME                         COMMENT
No ingredients listed in this section
 
STATE RIGHT-TO-KNOW
In addition to the ingredients found in Section 2, the following are listed for state right-to-know purposes.
 
INGREDIENT NAME                    WEIGHT %             COMMENT
No ingredients listed in this section
 

ADDITIONAL REGULATORY INFORMATION:
R-32 is subject to U.S. Environmental Protection Agency Clean Air Act Regulations at 40 CFR Part 82. WARNING: DO NOT vent to the atmosphere. To comply with provisions of the U.S. Clean Air Act, any residual must be recovered. Contains Difluoromethane (HFC-32), a greenhouse gas which may contribute to global warming.
 
WHMIS CLASSIFICATION (CANADA):
This product has been evaluated in accordance with the hazard criteria of the CPR and the MSDS contains all the information required by the CPR.
 
FOREIGN INVENTORY STATUS:
EU - EINECS # 2008394
 
 
 
 
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