Flammable Refrigerants

The concentration of flammable gases, vapours, mists, fumes and dusts is at or above 5 per cent of the lower explosion limit. 17. Hazchem Code. The Hazchem (emergency action) code provides information to emergency response services in terms of the type of extinguishing agent, protective equipment, spill containment, prospects for violent reaction and the need for evacuation. The code consists of a number followed by a letter, and an optional third letter 'E', e.g. 3YE 18. Hydrocarbon. A substance containing only hydrogen and carbon. 19. LC 50. A concentration of a substance in air that produces death in 50 per cent of experimental animals on short term inhalation expressed in mass per unit volume of air. 20. LD 50. The amount of substance that produces death in 50 per cent of a population of experimental animals. Normally expressed as milligrams per kilogram of body weight. 21. Material Safety Data Sheet. A document describing the properties of a substance defined in the National Commission's National Code of Practice for Completion of Material Safety data Sheets. 22. Threshold Limit Value. In three categories, these values are an exposure standard determined by the American Conference of Governmental Hygienists (ACGIH). It is the airborne concentration of substances at which persons may be exposed in the course of their daily work, on an indefinite basis without adverse effect. 23. RMD Refrigerant Metering Device. This term is used to generically describe the device used to control the quantity of refrigerant being fed into the evaporator. 24. Toxicity. The potential ability of a substance to cause deleterious (toxic) effects. Low: causes readily reversible changes which disappear after exposure stops. Causes some discomfort. Moderate: May cause reversible or irreversible changes to exposed tissue but not permanent injury. Causes considerable discomfort. High: capable of causing death or permanent injury in normal use. 25. Workplace. Any place, including aircraft, ship or vehicle, where a person works, is likely to work, or goes to while at work.

Temperature R600a HR12 R290 (Propane) HR22/502 (IsoButane) (R290+R600a) (R290+R170) °C °F MINUS 10 MINUS 40 -40 -40 kPa psi MINUS 30 kPa psi MINUS 50 -38 -36 -72 -10.5 kPa psi 14 2 kPa psi -36 -33 -69 -10.0 -6 -1 24 3 48 7 -34 -29 -66 -9.6 34 5 61 9 -32 -26 -62 -9.0 10 45 7 74 11 -30 -22 -59 -8.5 10 1 57 8 87 13 -28 -18 -54 -7.9 18 3 70 10 101 15 -26 -15 28 4 117 17 -24 -11 -50 -7.2 37 5 83 12 -22 -8 -45 -6.5 98 14 133 19 -20 -4 -40 -5.8 48 7 113 16 149 22 -18 0 59 9 129 19 168 24 -16 3 -34 -5.0 70 10 146 21 -14 7 -29 -4.1 164 24 187 27 -12 10 -22 -3.2 83 12 183 27 207 30 -10 14 -16 -2.3 96 14 202 29 228 33 -8 18 -8 -1.2 109 16 223 32 250 36 -6 21 -1 -0.1 124 18 274 40 -4 25 139 20 246 36 298 43 -2 28 7 1.1 155 23 269 39 0 32 16 2.3 293 43 324 47 2 36 25 3.6 172 25 319 46 351 51 4 39 35 5.0 189 27 346 50 380 55 6 43 45 6.5 208 30 374 54 409 60 8 46 56 8.1 227 33 404 59 441 64 10 50 67 9.7 247 36 435 63 473 69 12 54 79 11.4 268 39 467 68 503 74 14 57 92 13.3 290 42 501 73 541 79 16 61 314 46 536 78 578 84 18 64 105 15.2 338 49 573 83 20 68 119 17.2 611 89 616 90 22 72 133 19.3 363 53 651 95 656 96 24 75 149 21.6 389 57 693 101 698 102 26 79 165 23.9 417 61 737 107 741 108 28 82 182 26.4 445 65 782 114 786 115 30 86 199 28.9 475 69 829 120 833 121 32 90 218 31.6 506 73 877 127 881 128 34 93 237 34.4 538 78 928 135 932 136 36 97 257 37.3 571 83 981 142 984 143 38 100 278 40.4 606 88 1035 150 1038 151 40 104 642 93 1092 158 1092 159 42 108 300 43.6 679 99 1150 167 44 111 323 46.9 1211 176 1150 168 46 115 347 50.3 718 104 1273 185 1209 176 48 118 371 53.9 758 110 1338 194 1272 185 50 122 397 57.7 800 116 1405 204 1337 195 52 126 424 61.5 843 122 1475 214 1403 205 54 129 452 65.6 887 129 1546 224 1472 215 56 133 481 69.7 933 135 1620 235 1543 225 510 74.1 981 142 1696 246 1615 235 1030 150 1775 258 1689 246 541 78.6 1081 157 1856 269 573 83.2 1768 258 606 88.0 1133 164 1848 269 641 93.0 1187 172 1929 281 676 98.1 1243 180 2013 293 1300 189 2100 306 1359 197

C. R290 Blend (Propane) Med-Low Temp - Material Safety Data Sheet









R290 Blend (Propane) Low Temp - Material Safety Data Sheet









Thermal properties of relevant hydrocarbon refrigerants Property Propane + Propane Propene or Propane + Ethane (metric units) Isobutane Isobutane R290 Propylene Ethane R170 Minus 40 Refrigerant R600a Minus 30 Care 40 R1270 Minus 50 Nb Minus 10 Care 30 96 Care 45 Care 50 Care 10 115 Other Trade 4135 92 91 33 Names 136 3939 44 Critical -- Temperature (°C) Critical 3584 4512 4190 4909 Pressure (kPag) Molecular 58 42 -- 33 Weight (mol/g) Boiling Point -31 -42 -48 -49 -88 @ 101.32kPa -11.8 (°C) 279 304 359 377 Refrigeration 289 29 28 309 302 -- Effect @ - 356 63 62 384 382 -- 10°C (kJ/kg) 27 30 -- 495 483 69 70 -- Heat of 3.6 6.85 Rejection @ 134 241 488 466 -- 40°C (kJ/kg) 865 1265 8.18 7 -- 7.8 0 328 355 1766 Flash Gas (%) 27 1547 1535 -- 0 3.9 0 Discharge 52 Vapour Temperature (°C) Liquid Density 543 @ 33°C (g/L) Vapour 2.75 Density @ 5°C (g/L) Pressure @ - 8 10°C (kPag) Pressure @ 435 40°C (kPag) Temperature 0 Glide (K)

R-32 Safety Data Sheet R-32 1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION PRODUCT NAME: R-32 OTHER NAME: 1,1- Difluoromethane USE: Refrigerant Gas DISTRIBUTOR: National Refrigerants, Inc. 661 Kenyon Avenue Bridgeton, New Jersey 08302 FOR MORE INFORMATION CALL: IN CASE OF EMERGENCY CALL: CHEMTREC: 1-800-424-9300 (Monday-Friday, 8:00am-5:00pm) 1-800-262-0012 2. HAZARDS IDENTIFICATION CLASSIFICATION: Flammable Gas, Gas under pressure, Compressed Gas SIGNAL WORD: DANGER HAZARD STATEMENT(S): Extremely flammable gas, Contains gas under pressure, may explode if heated SYMBOL(S): Flames, Gas Cylinder PRECAUTIONARY STATEMENT(S): Prevention: Keep away from heat, sparks, open flame, and hot surfaces. No Smoking Response: Leaking gas fire: Do not extinguish unless leak can be stopped immediately. Eliminate all ignition sources if safe to do so. Storage: Protect from sunlight, store in a well ventilated place. EME RGE NCY OVE RVIE W: Flammable gas. Liquid under high pressure. POTENTIAL HEALTH EFFECTS: Efrfects of Overexposure:

Eye Contact Eye Contact with the rapidly evaporation liquid my cause frostbite. Skin Contact Skin contact with the rapidly evaporation liquid may cause frostbite. Frostbite effects are a change in color of the skin to grey or white, followed by blistering. Inhalation Vapor is heavier than air and can cause suffocation by reducing oxygen available for breathing. Inhalation of high vapor concentration may cause dizziness, disorientation, incoordination, narcosis, nausea or vomiting, leading to unconsciousness, cardiac irregularities, or death. Ingestion Not an expected route of exposure. OTHER EFFECTS OF OVEREXPOSURE: None Expected. 3. COMPOSITION / INFORMATION ON INGREDIENTS INGREDIENT NAME CAS NUMBER WEIGHT % 1,1-Difluoromethane 75-10-5 100 COMMON NAME and SYNONYMS R-32; HCFC-32 There are no impurities or stabilizers that contribute t o the classification of the material dentified in Section 2 4. FIRST AID MEASURES SKIN: Immediately wash with plenty of warm water (do not rub). Thaw affected area with water. Remove contaminated clothing. Caution: clothing may adhere to the skin in case of freeze burns. If symptoms (irritation or blistering) develop, get medical attention. EYES: Immediately flush with plenty of water. After initial flushing, remove any contact lenses and continue flushing for at least 15 minutes. Hold eyelids open during flushing. Have eyes examined and treated by medical personnel. INHALATION: Move victim to fresh air. Keep warm and at rest. If breathing is labored, give oxygen. If only breathing has stopped, give artificial respiration with a pocket mask equipped with a on-way valve to prevent exposure to product or body fluids. If breathing has stopped and there is no pulse, give cardiopulmonary resuscitation (CPR). Get immediate medical attention. INGESTION: Highly unlikely, but should this occur, freeze burns will result. Do not induce vomiting unless instructed to do so by a physician. ADVICE TO PHYSICIAN: Symptomatic and supportive therapy, as indicated. Administration of epinephrine or similar sympathomimetic drugs should be with special caution and only in situations of emergency life support as cardiac arrhythmias may result

5. FIRE FIGHTING MEASURES FLAMMABLE PROPERTIES FLASH POINT: Not applicable AUTOIGNITION TEMPERATURE: Not available UPPER FLAME LIMIT: 31% (% v/v) LOWER FLAME LIMIT: 14% (% v/v) HAZARDOUS REACTIONS: Reacts with finely divided metals such as aluminum, zinc, magnesium, and alloys containing more the 2% magnesium. Can react violently if in contact with alkali metals and alkaline earth metals such as sodium, potassium, or barium. During a fire the product can form toxic and corrosive gases such as hydrogen fluoride. EXTINGUISHING MEDIA: Suitable extinguishing medium is dry powder. Allow escaping gas to urn under controlled conditions. Extinguish only if escape of gas can be rapidly stopped as it may form a flammable vapor cloud. FIRE AND EXPLOSION HAZARDS: Flammable liquefied gas. Container may burst under intense heat. Ruptured cylinders may rocket or fragment. Heavy vapor may suffocate. Certain mixtures of HFC-32 and chlorine may be flammable under some conditions. FIRE FIGHTING PROCEDURES: Water spray should be used to cool containers. FIRE FIGHTING PROTECTIVE EQUIPMENT: Use self-contained breathing apparatus with a full-face piece and special protective clothing. 6. ACCIDENTAL RELEASE MEASURES This product is a flammable, liquefied gas, which exits the container at temperatures capable of causing freeze burns (frostbite). Contents under pressure. Ruptured cylinder may rocket or fragment. Precautions should take into account the severity of the leak or spill. Move unprotected personnel upwind of leaking container. Remove ignition sources and ventilate the spill area. Use recommended personal protection and shut off the leak, if without risk. If possible, elevate leak position to highest point of container (should leak gas, not liquid). Water should never be put on leak nor should cylinder be immersed. If possible, dike and contain spillage. Prevent liquid from entering sewers sumps, or pit areas since vapor is heavier than air and can create a suffocation atmosphere. Capture material for recycle or destruction if suitable equipment is available. Notify applicable government authority if release is reportable or could adversely affect the environment.

7. HANDLING AND STORAGE HANDLING: Wear appropriate personal protective equipment. A safety shower and eyewash station should be nearby and ready for use. This product is a flammable, liquefied gas, which exits the container at temperatures capable of causing freeze burns (frostbite). Ensure personnel are trained in handling and storing cylinders. Secure containers at all times. Keep containers closed when not in use. Ensure there is adequate ventilation or use proper respiratory protection in poorly ventilated or confined areas. Avoid causing and inhaling high concentration or vapor. Atmospheric levels should be controlled to below the occupational exposure limit and kept as low as practicable. Prevent liquid or vapor from entering sumps or sewers since vapor is heavier than air and may form suffocating atmospheres. Do not put mixtures of HFC-32 with air or oxygen under pressure; do not use such mixtures for leak or pressure testing.Do not heat containers. Liquid transfers between containers may generate static electricity. Ensure adequate grounding. Avoid trapping liquid between closed valves or overfilling containers as high pressures can develop with an increase in temperature. Avoid HFC-32 contact with flames or very hot surfaces. STORAGE RECOMMENDATIONS: Keep containers tightly closed, in a cool, well-ventilated place. Keep containers dry. Keep from incompatibles, open flames, hot surfaces, welding operations, and other heat sources. STORAGE TEMPERATURE: Store at temperature not exceeding 125 deg. F. (52deg. C). INCOMPATIBILITIES: Freshly abraded aluminum surfaces at specific temperatures and pressures may cause a strong exothermic reaction. Chemically reactive metals: potassium, calcium, powdered aluminum, magnesium, and zinc. 8. EXPOSURE CONTROLS / PERSONAL PROTECTION ENGINEERING CONTROLS: Use ventilation to maintain safe levels. Where appropriate engineering controls are not in place or are inadequate, wear suitable respiratory equipment. PERSONAL PROTECTIVE EQUIPMENT SKIN PROTECTION: Take all precautions to prevent skin contact. Use gloves and protective clothing made of material that has been found by user to be impervious under conditions of use to prevent the skin from becoming frozen for contact with liquid. User should verify impermeability under normal conditions of use prior to general use. Additional protection such as an apron, arm covers, or full body suit may be need depending on conditions of use. EYE PROTECTION: Use chemical safety goggles or safety glasses and a face shield when there is potential for eye contact.

RESPIRATORY PROTECTION: Not normally needed if controls are adequate. If needed, use NIOSH/MSHA approved respirator for organic vapors. For high concentrations and oxygen-deficient atmospheres, use positive pressure air-supplied respirator. OTHER PROTECTION: Shower and eye wash station. EXPOSURE GUIDELINES ACGIH TLV OSHA PEL OTHER INGREDIENT NAME None None *1000 ppm TWA (8hr) LIMIT Difluoromethane * = Workplace Environmental Exposure Level (AIHA) Minimize exposure in accordance with good hygiene practice. 9. PHYSICAL AND CHEMICAL PROPERTIES APPEARANCE: Colorless liquefied gas PHYSICAL STATE: Gas at ambient temperature ODOR: Faint ethereal odor SOLUBILITY IN WATER (weight %): Insoluble BOILING POINT: -51.7C (-61.1F) VAPOR PRESSURE (mmHg at 20 deg. C): FLASH POINT: 10,319 EVAPORATION RATE >662F (ASTM-D-1929 Method B) FLAMMABILITY: Not Available LEL/UEL: Mildly flammable PARTITION COEFF (n-octanol/water) 14.4% / 31% Log Pow: 0.21. Note: This product is more soluble than AUTO IGNITION TEMP: octanol DECOMPOSITION TEMPERATURE: 648˚C / 1198˚F VISCOSITY: No data available VAPOR DENSITY (air = 1.0): Not applicable % VOLATILES BY VOLUME 1.86 at normal boiling point DENSITY: 100 WT% pH: 0.96 g/cm3 at 77F (25˚C) MELTING POINT: Not applicable SPECIFIC GRAVITY (water = 1.0): 280˚F MOLECULAR FORMULA: 0.98 at 68F (20˚C) MOLECULAR WEIGHT: CH2F2 50.02 10. STABILITY AND REACTIVITY CHEMICAL STABILITY: Stable under normal conditions. INCOMPATIBILITIES: Reacts with finely divided metals such as aluminum, zinc, magnesium, and alloys containing more then 2% magnesium. Can react violently if in contact with alkali metals and alkaline earth metals such as sodium, potassium, or barium. HAZARDOUS DECOMPOSITION PRODUCTS: Hydrogen fluoride by thermal decomposition and hydrolysis.

CONDITIONS TO AVOID: Keep away from heat, sparks, and flame. Avoid high temperatures. HAZARDOUS POLYMERIZATION: Will not occur. 11. TOXICOLOGICAL INFORMATION POSSIBLE HUMAN HEALTH EFFECTS: Routes of Exposure: Inhalation, ingestion, eye, and skin contact. Inhalation: Exposure to high vapor concentrations may cause and abnormal heart rhythm and prove suddenly fatal. Very high atmospheric concentrations can cause anesthetic effects progressing from dizziness, weakness, nausea, to unconsciousness. It can act as an asphyxiant by limiting available oxygen. Ingestion: Highly unlikely, but should this occur, freeze burns will result. Eye Contact: Liquid splashes or spray may cause freeze burns. Skin Contact: Liquid splashes or spray may cause freeze burns. Other Effects: None anticipated. Carcinogenicity: Ingredient Name NTP STATUS ACGIH IARC STATUS OSHA LIST No ingredients listed in this section ANIMAL DATA: LC50 4 hr., (rat inhalation) - > 520,000 ppm Because of its volatility this compound has not been tested for skin or eye irritancy or skin sensitization. No cardiac sensitization (arrhythmias) occurred in dogs pretreated with epinephrine at 350,000 ppm. In an earlier cardiac sensitization study, a no observed effect level (NOEL) of 200,000 ppm and threshold of 250,000 ppm were established. No teratogenic effects were seen in rats or rabbits at dose levels up to 50,000 ppm. No adverse effects were seen at the highest dose level of 50,000 ppm in a 90-day inhalation. No genotoxicity was observed in a range of in vitro tests or an in vivo mouse micronucleus assay. 12. ECOLOGICAL INFORMATION PERSISTENCE AND DEGRADATION: Decomposes comparatively rapidly in the lower atmosphere (troposphere). Atmospheric lifetime is 4.9 years. Products of decomposition will be highly dispersed and hence will have a very low concentration. It is not considered an ozone-depleting chemical. EFFECT ON EFFLUENT TREATMENT: Discharges of the product will enter the atmosphere and will not result in long-term aqueous contamination. 13. DISPOSAL CONSIDERATIONS

DISPOSAL METHOD: Discarded product is not a hazardous waste under RCRA, 40 CFR 261. However, HFC-32 should be recycled, reclaimed, or destroyed whenever possible. CONTAINER DISPOSAL: May contain explosive vapors. Do not distribute, make available, furnish, or reuse container when emptied of the original product. Do not weld or use cutting torch on or near container. Empty container retains product residue. Return containers to supplier. REFRIGERATION APPLICATION: Subject to “no venting” regulations of Section 608 of the Clean Air Act during the service or disposal of equipment. 14. TRANSPORT INFORMATION US DOT ID NUMBER: UN3252 US DOT HAZARD CLASS: US DOT PROPER SHIPPING NAME: Difluoromethane or Refrigerant gas R-32 US DOT HAZARD CLASS: 2.1 US DOT PACKING GROUP: Not applicable 15. REGULATORY INFORMATION TSCA (TOXIC SUBSTANCES CONTROL ACT) REGULATIONS, 40 CFR 710: All ingredients are on the TSCA Chemical Substances Inventory. CALIFORNIA PROPOSITION 65: The ingredients in this product do not contain any chemicals known to State of California to cause cancer, birth defects, or any other reproductive harm. CERCLA and SARA REGULATIONS: 40 CFR 372: This product does not contain any chemicals subject to reporting requirements of SARA Section 313. 40 CFR 355: This product does not contain any “extremely hazardous chemical” subject to the requirements of SARA Section 312. 40 CFR 370: Hazardous properties as defined under the Hazard Communication Standard (29 CFR 1910.1200). Health: Acute effects (CNS depression, cardiac sensitization). Physical: Flammable liquefied gas. (Actions may be necessary under SARA Section 311 – consult regulations for applicability). 16. OTHER INFORMATION CURRENT ISSUE DATE: May, 2018 PREVIOUS ISSUE DATE: May, 2015

OTHER INFORMATION: HMIS Classification: Health – 1, Flammability – 4, Reactivity – 1 Regulatory Standards: 1. OSHA regulations for compressed gases: 29 CFR 1910.101 2. DOT classification per 49 CFR 172.101 DISCLAIMER: National Refrigerants, Inc. believes that the information and recommendations contained herein (including data and statements are accurate as of the date hereof. NO WARRANTY OF FITNESS FOR ANY PARTICULAR PURPOSE, WARRANTY OF MERCHANTABILITY, OR ANY OTHER WARRANTY, EXPRESSED OR IMPLIED, IS MADE CONCERNING THE INFORMATION PROVIDED HEREIN. The information provided herein relates only to the specific product designated and may not be valid where such product is used in combination with any other methods of use of the product and of the information referred to herein are beyond the control of National Refrigerants. National Refrigerants expressly disclaims any and all liability as to any results obtained or arising from any use of the product or reliance on such information.