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Refrigerant

Properties of a number of the more common refrigerants used.

Ethylene glycol

Properties - Low viscosity
- Toxic
- Colorless and odorless liquid
- Water soluble
- Relatively low price
Chemical formula C2H4(OH)2
Molar mass 62,068 g/mol
Melting point -13 ˚C
Boiling point 198 ˚C
Freezing point chart  Freezing point chart

Propylene glycol

Properties - High viscosity
- Lower toxicity
- Oily, colorless liquid
- Water soluble
Chemical formula C3H6(OH)2
Molar mass 76,0944 g/mol
Melting point -59 ˚C
Boiling point 188,2 ˚C

Ethyl alcohol

Properties - Highly corrosive
- Flameable
- Colorless
- Water soluble
- Relatively low price
Chemical formula C2H5(OH)
Molar mass 46,069 g/mol
Melting point -114,3 ˚C
Boiling point 78,4 ˚C

Calcium chloride

Properties - Highly corrosive
- White crystals
- Water soluble
- Good thermodynamic properties
Chemical formula CaCl2
Molar mass 110,98 g/mol
Melting point 782 ˚C
Boiling point 1635 ˚C

Potassium carbonate

Properties - PH ~12
- Smells sharp
- Water soluble
- Corrosive
- Harmful and irritating to skin and eyes
Chemical formula K2CO3
Molar mass 254.9962 g/mol

Ammonia

Properties - PH ~12
- Smells sharp
- Water soluble
- Very corrosive
- Very little impact on the ozone layer or greenhouse effect
- can cause irritation to the lungs, skin and eyes
Chemical formula NH3
Molar mass 17.0304 g/mol

Glycerin

Properties - PH ~7
- Very high viscosity at low temperatures.
- Water soluble
- Mild odor
Chemical formula C3H5(OH)3

Methyl alcohol

Properties - Very toxic if swallowed, can be fatal if inhaled
- Can cause intoxication, visual impairment, cramps and brain damage.
Chemical formula CH3OH
Molar mass 32.0366 g/mol