Propylene glycol
IUPAC name: Propane-1,2-diol
Synonyms: monopropylene glycol, 1,2-dihydroxypropane, methylethylene glycol 1,2-dihydroxypropane, methylethylene glycol
EC #: 200-338-0
CAS #: 57-55-6
Molecular formula: C3H8O2
REACH Registration Number: 01-2119456809-23-0012
Quality Categories: Technical and USP (Pharmacopoeia)
Description
-
Propylene glycol is a high-purity, syrupy liquid that is a colorless, odorless, tasteless, synthetic, completely water-soluble substance.
-
As a technical / USP antifreeze, propylene glycol is used as a solvent and wetting agent in cosmetics and as an antifreeze fluid, among others.
-
Propylene glycol is not a hazardous substance and is not classified in 1272/2008. Regulation (EC) and Directive 67/548 / EEC.
-
It has a similar function to ethylene glycol, but the use of propylene glycol is preferred due to its low toxicity.
Specification
Quality Categories: Technical and USP
-
Freezing point: -58 ° C
-
Boiling point: 184-189 ° C
-
Density: 1.075 g / cm3
-
Viscosity: 45 mPa.s
-
With dilution, the freezing point is not directly proportional.
-
1 part water and 1 part propylene glycol have a freezing point below -30 degrees.
-
Freezing point of 99% solution: -58 ° C
-
Excellent corrosion parameters, high stability against thermal decomposition.
-
Recommended replacement period is 2-3 years.
General consumer use
-
Use in refrigeration systems in industrial installations
-
De-icing and de-icing applications
-
Use in geothermal heat pumps and solar collectors
-
Other consumer uses (PC 28: Perfumes, perfumes; PC 29: Pharmaceuticals; PC 39:
Cosmetics, personal care products) -
Agrochemical uses (PC 12: Fertilizers; PC 27: Plant protection products)
-
Use in coatings
-
Use in cleaning products
MPG dilution table (freezing point °C / concentration %)
Sustainability summary:
Production process
Refinement
Oil / natural gas
Propene
Oxidation
Hydrolysis
Propylene oxide
Propylene glycol
Life Cycle Assessment (LCA) - Per 1 tonne (T) :
-
Based on Ecoinvent database (from raw material extraction to the end of the production process)
-
Carbon footprint = ∿ 4670 kg CO2 eq / T , which is approximately equal to (US EPA data):
-
∿ 18870 km travel (car)
-
∿ consuming 1980 liters of petrol
-
∿ burning 2340 kg of black coal
-
∿ 6 month-long energy consumption of an average European household
-
∿ burning 11 barrels of oil
-
Carbon neutralization of this quantity would require at least:
-
∿ Development of 77 seedlings over 10 years
-
∿ One-year-long carbon sequestration capacity of 2.3 hectares forest
Life cycle:
+ CO2
+ CO2
+ CO2
1
2
3
4
+ CO2
raw material
extraction
production process
transportation - logistics
application
leakage
5
incineration
With sustainability and the protection of our environment in mind, choose the most climate-friendly glycol-based heat transfer liquids currently available on the market:
... or our plant-based propylene glycol product from completely renewable source:
... and in case of used glycol, ask for our regeneration service!