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Glycerol is a colorless, viscous, hygroscopic, sweet-tasting trihydric alcohol. It is also called glycerin or glycerine, with the term glycerol being preferred as the pure chemical form and the term glycerin(e) being primarily used when the compound is used commercially in various grades.
Specification:
Index name | Index | |||
Grade | Super grade | Top grade | First grade | Second grade |
Chroma ≤ | 20 | 20 | 30 | 70 |
Assay % ≥ | 99.5 | 98.5 | 98.0 | 95.0 |
Density20centigradeg/m ≥ | 1.2598 | 1.2572 | 1.2559 | 1.2481 |
Chloride Assay ≤ | 0.001 | 0.001 | 0.01 | 0.05 |
Sulfating Ash (%) ≤ | 0.01 | 0.01 | 0.01 | 0.01 |
Acidity or Alkalinity (mmol/100g)≤ | 0.064 | 0.064 | 0.1 | 0.3 |
Saponification equivalent (mmol/100g) ≤ | 0.64 | 0.64 | 1.0 | 3.0 |
Heavy metals Assay (as Pb, mg/kg≤ | 5 | 5 | 5 | 5 |
As (as As, mg/kg)≤ | 2 | 2 | 2 | 2 |
Application:
1) In medicine, it is used to making various preparations, solvent, hygroscopic agent, antifreeze and sweeteners, preparation for external use ointment or suppository, with glycerol nitroglycerin used for explosive materials.
2) In the coatings industry, it is used for making all kinds of alkyd resin and polyester resin, epoxy resin and glycidyl ether.
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