R32

  性质 Properties Symbol Unit Value References
Basic Physical and Chemical Properties CAS注册号 CAS Registry Number CASRN / 75-10-5 Scifinder®
中文名称 Chemical Name / / Difluoromethane
二氟甲烷
Scifinder®
英文名称 English Name / / HFC-32,Freon 32,R32 Scifinder®
组成 Composition / /
分子式 Molecular Formula / / CH2F2 Scifinder®
结构式 Structure Formula / / CH2F2 Scifinder®
相对分子量 Molecular Weight MW / 52.02 Scifinder®
物理状态 Physical State / / Gas Airgas MSDS
气味 Odor / / Ethereal BOC Gases MSDS
颜色 Color / / Colourless BOC Gases MSDS
熔点 Melting Point mp -136
-136
-136.8
chemblink
BOC Gases MSDS
CRC Handbook of Chemistry and Physics(2010)
沸点 Boiling Point bp -62.2±8.0
-51.7
-51.73
-51.7
-51.6
-51.7
Scifinder®
chemblink
Reaxys:Journal of Chemical & Engineering Data,2003,vol.48,#4 P.1068-1072
BOC Gases MSDS
Thermophysical Properties of Chemicals and Hydrocarbons, 2008
REFPROP 9.0
饱和蒸汽压 Saturated Vapor Pressure(25℃) Psat MPa 1.75985
1.70099
1.6896
Scifinder®
Reaxys:Journal of Chemical & Engineering Data,1996,vol.41,#1 P.43-46
REFPROP 9.0
液体密度 Liquid Density(25℃) dl g/cm3 0.929±0.06
1.1
0.927
1.1
0.9570
0.96101
Scifinder®
chemblink
Reaxys:Journal of Chemical & Engineering Data,2003,vol.48,#4 P.1068-1072
BOC Gases MSDS
Thermophysical Properties of Chemicals and Hydrocarbons, 2008
REFPROP 9.0
气体密度 Vapor Density(25℃, 101.325kPa) dg kg/m3 47.339 REFPROP 9.0
挥发性 Volatility / wt%
蒸发速度 Evaporation Rate(CCl4=1) / /
Critical Properties 临界温度 Critical Temperature Tc 78.095
78.41
78.11
78.1
Reaxys:Journal of Chenical Thermodynamics,1999,vol.31,#7 P.905-920
CRC Handbook of Chemistry and Physics(2010)
Thermophysical Properties of Chemicals and Hydrocarbons, 2008
James M calm Physical,safty,and environmental data for current and alternative refrigerants
临界压力 Critical Pressure Pc MPa 5.78
5.83
5.785
5.78
Reaxys:Journal of Chenical Thermodynamics,1999,vol.31,#7 P.905-920
CRC Handbook of Chemistry and Physics(2010)
Thermophysical Properties of Chemicals and Hydrocarbons, 2008
James M calm Physical,safty,and environmental data for current and alternative refrigerants
临界体积 Critical Volume Vc cm3/mol 121.8
123
123
Reaxys:Journal of Chenical Thermodynamics,1999,vol.31,#7 P.905-920
2009 ASHRAE Handbook-Fundamentals
Thermophysical Properties of Chemicals and Hydrocarbons, 2008
临界密度 Critical Density ρc kg/m3 418.7
424
423
Reaxys:Journal of Chenical Thermodynamics,1999,vol.31,#7 P.905-920
2009 ASHRAE Handbook-Fundamentals
Thermophysical Properties of Chemicals and Hydrocarbons, 2008
临界压缩因子 Critical Compressibility Factor Zc / 0.244 Thermophysical Properties of Chemicals and Hydrocarbons, 2008
液体压缩因子 Liquid Compressibility Factor Z / 0.036897 REFPROP 9.0
气体压缩因子 Vapor Compressibility Factor Z / 0.74904
0.9863
REFPROP 9.0
偏心因子 Acentric Factor ω / 0.277 Thermophysical Properties of Chemicals and Hydrocarbons, 2008
Thermophysical Properties 液体焓 Liquid Enthalpy H kJ/kg 112.44
245.60
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
气体焓 Vapor Enthalpy H kJ/kg 383.457
516.51
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
液体熵 Liquid Entropy S kJ/kg·K 0.233
1.1566
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
气体熵 Vapor Entropy S kJ/kg·K 0.738
2.0652
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
生成焓 Enthalpy of Formation(25℃) ΔfHO kJ/mol -441.707
-452.3
Reaxys:Journal of Physical Chemistry,1958,vol.62,P.1043-1047
CRC Handbook of Chemistry and Physics(2010)
蒸发焓 Enthalpy of Vaporization ΔvH kJ/kg 938.178
998.784
270.90
Scifinder®
Reaxys:Journal of Physical Chemistry,1987,vol.91,#15 P.4198-4203
REFPROP 9.0
液体等压热容 Liquid Isobaric Heat Capacity(25℃) Cp kJ/kg·K 1.077
1.9367
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
气体等压热容 Vapor Isobaric Heat Capacity(25℃) Cp kJ/kg·K 2.231
0.8892
1.6045
0.8421
CRC Handbook of Chemistry and Physics(2010)
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
Air Liquide MSDS
液体等容热容 Liquid Isochoric heat capacity(25℃) Cv kJ/kg·K 0.95766 REFPROP 9.0
气体等容热容 Vapor Isochoric heat capacity(25℃) Cv kJ/kg·K 0.95504
0.6721
REFPROP 9.0
Air Liquide MSDS
Solubility 偶极矩 Dipole Moment μ D 2.61
1.9785±0.02
1.979
Reaxys:Physical Chemistry Chemical Physics,2001,vol.3,#19 P.4200-4207
CRC Handbook of Chemistry and Physics(2010)
Thermophysical Properties of Chemicals and Hydrocarbons, 2008
解离常数 Dissociation Constant
清洗能力 KB
水中溶解度 Solubility in Water(23℃) / ppm wt/wt 18000 Scifinder®
贝壳松脂丁醇值 Kauri-Butanol Value KB /
辛醇/水分配系数 Octanol/Water Partition Coefficient LogP / 0.611±0.250 Scifinder®
Hildabrand溶解度参数 Hildabrand Solubility Parameter δ cal/ml
Other Properties 液体焦耳-汤姆逊系数 Liquid Joule-Thomson Coefficient JT ℃/MPa 0.20758 REFPROP 9.0
气体焦耳-汤姆逊系数 Vapor Joule-Thomson Coefficient JT ℃/MPa 23.695 REFPROP 9.0
液体粘度 Liquid Viscosity(25℃) η mPa·s 0.0124
0.1134
0.11366
Reaxys:Journal of Chemical Physics,1994,vol.100,#4 P.3149-3151
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
气体粘度 Vapor Viscosity(25℃) η mPa·s 0.0132
0.012817
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
液体导热系数 Liquid Thermal Conductivity(25℃) λ mW/m·K 125.89 REFPROP 9.0
气体导热系数 Vapor Thermal Conductivity(25℃) λ mW/m·K 15.022 REFPROP 9.0
液体介电常数 Liquid Dielectric Constant ε F/m 14.67 2009 ASHRAE Handbook-Fundamentals
气体介电常数 Gas Dielectric Constant ε F/m 1.0102 2009 ASHRAE Handbook-Fundamentals
液体体积电阻系数 Liquid Volume Resistivity(1kHz) ρ Ω·cm
气体体积电阻系数 Gas Volume Resistivity(1kHz) ρ Ω·cm
表面张力 Surface Tension(25℃) γ mN/m 6.78
6.7771
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
液体声速 Liquid Sound Velocity u m/s 554.13
554.20
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
气体声速 Vapor Sound Velocity u m/s 203.70
203.72
2009 ASHRAE Handbook-Fundamentals
REFPROP 9.0
最低灭火浓度 Minimum Extinguishment Concentration MEC %
Atmospheric Effects 臭氧消耗潜能值 Ozone Depletion Potential ODP / 0
0
BOC Gases MSDS
James M calm Physical,safty,and environmental data for current and alternative refrigerants
全球变暖潜能值 Global Warming Potential(100yr) GWP / 580
650
716
BOC Gases MSDS
CRC Handbook of Chemistry and Physics(2010)
James M calm Physical,safty,and environmental data for current and alternative refrigerants
大气寿命 Atmospheric Life / yr 4.9
5.2
CRC Handbook of Chemistry and Physics(2010)
James M calm Physical,safty,and environmental data for current and alternative refrigerants
光化学臭氧合成潜能 photochemica lozone creation potential POCP /
全球温度潜势 global temperature change potential(100yr) GTP / 94 Global Warming Potentials and Radiative Efficiencies of Halocarbons and Related Compounds: A Comprehensive Review, Accepted for publication in Rev. Geophys
Flammability 闪点 Flash Point / -78.5±6.3 Scifinder®
自燃点 Autoignition Point / 648 BOC Gases MSDS
燃烧下限 Lower Flammability Limit LFL %vol 13.5
14.4
13.3
14
田贯三,博士学位论文
周子成 .HFO-1234yf制冷剂在汽车空调系统中使用的评价
张锐.新型替代制冷剂爆炸极限理论与实验研究
Airgas MSDS
燃烧上限 Upper Flammability Limit UFL %vol 31.4
29.3
29.3
31
田贯三,博士学位论文
周子成 .HFO-1234yf制冷剂在汽车空调系统中使用的评价
张锐.新型替代制冷剂爆炸极限理论与实验研究
Airgas MSDS
燃烧热 Heat of Combustion HOC MJ/kg 9.4 James M calm Physical,safty,and environmental data for current and alternative refrigerants
最小点火能 Minimum Ignition Energy MIE mJ 30-100 周子成 .HFO-1234yf制冷剂在汽车空调系统中使用的评价
燃烧速度 Burning Velocity Su cm/s 6.7 周子成 .HFO-1234yf制冷剂在汽车空调系统中使用的评价
可燃浓度限值 ASHRAE Flammable Concentration Limit FCL ppm v/v 36000 ASHRAE 34-2010
最大燃烧压力 Maximum Combustion Pressure 105Pa 10.9 田贯三,博士学位论文
最大燃烧压力上升速率 Maximum Rate of Pressure Increase During Combustion
Toxicity RTECS号 Registry of Toxic Effects of Chemical Substances® Number / / PA8537500 化学物质毒性数据库
接近致死浓度 Approximate Lethal Concentration ALC ppm v/v
半数致死浓度 Lethal Concentration 50% LC50 ppm v/v 760000 ASHRAE 34-2010
心脏致敏最低作用剂量 Cardiac Sensitization Lowest Observed Effect Level LOEL ppm v/v 250000 ASHRAE 34-2010
心脏致敏最高无作用剂量 Cardiac Sensitization No Observed Effect Level NOEL ppm v/v 200000 ASHRAE 34-2010
麻醉效应半数作用浓度 Anesthesia Effective Concentration 50% EC50 ppm v/v none ASHRAE 34-2010
麻醉效应最低作用剂量 Anesthesia Lowest Observed Effect Level LOEL ppm v/v none ASHRAE 34-2010
麻醉效应最高无作用剂量 Anesthesia No Observed Effect Level NOEL ppm v/v 250000 ASHRAE 34-2010
28天亚急性吸入毒性 28 Days Subacute Inhalation Toxicity NOEL ppm v/v
90天亚慢性吸入毒性 90 Days Subchronic Inhalation Toxicity NOEL ppm v/v
一年长期吸入毒性 Long Term Inhalation Toxicity (12 month) NOEL ppm v/v
两年长期吸入毒性 Long Term Inhalation Toxicity (24 month) NOEL ppm v/v
立即威胁生命和健康浓度 NIOSH Immediately Dangerous to Life or Health IDLH ppm v/v
缺氧限值 ASHRAE Oxygen Deprivation Limit ODL ppm v/v 140000 ASHRAE 34-2010
急性毒性暴露限值 ASHRAE Acute Toxicity Exposure Limit ATEL ppm v/v 200000 ASHRAE 34-2010
制冷剂浓度限值 ASHRAE Refrigerant Concentration Limit RCL ppm v/v 36000 ASHRAE 34-2010
职业接触限值 ASHRAE Occupational Exposure Limit OEL ppm v/v 1000 James M calm Physical,safty,and environmental data for current and alternative refrigerants
时间加权平均阈限值 ACGIH Threshold Limit Value-Time-Weighted Average TLV-TWA ppm v/v 1000 Airgas MSDS
允许暴露水平 OSHA Permissible Exposure Level PEL ppm v/v
工作环境暴露水平 AIHA Workplace Environmental Exposure Level WEEL ppm v/v 1000 Airgas MSDS
可接受暴露限值 Dupont Acceptable Exposure Limit AEL ppm v/v
ASHRAE安全等级 ASHRAE Safety Group / / A2L James M calm Physical,safty,and environmental data for current and alternative refrigerants
嗅觉阈值 Odor Threshold / ppm v/v
大型水蚤半数作用浓度水生态毒性 Aquatic Toxicity of 48h Daphnia Magna Effective Concentration 50% EC50 mg/L 652 National Refrigerants MSDS
虹鳟鱼半数致死浓度水生态毒性 Aquatic Toxicity of 96h Rainbow Trout Lethal Concentration 50% LC50 mg/L 1570 National Refrigerants MSDS
皮肤刺激或腐蚀
降解产物 Degradation Products Carbonyl fluoride,Carbon monoxide,Hydrogen fluoride BOC Gases MSDS