Glycerin can be classified into natural glycerin, also known as saponified glycerin, and synthetic glycerin using propylene as a raw material, depending on the production method. Compared with other glycerin, saponified glycerol has better quality and has a wide range of uses, mainly including:
1. Used as an anti-cooling agent for aircraft fuel liquids in aircraft boxes;
2. In the paper industry, it is used as a brightener for cellophane and a plasticizer for the production of coated paper;
3, as a raw material for surfactants, toothpaste, an important moisturizer for cosmetics;
4. A moisture absorbent for leather, textiles, etc., a moisturizer for retaining tobacco in cigarettes;
5, edible flavor, plasticizer raw materials;
6, used in the manufacture of glyceryl trinitrate smokeless powder, nitroglycerol acid resin and ester glue.
The specific classification of glycerin is: industrial grade, cosmetic grade, food grade, pharmaceutical grade (sub-drug supplement and drug master), four grades.
Industrial grade usually refers to the second-class glycerin in GB13206. 95% of pharmaceutical grade glycerin requires relatively high impurities in glycerin, has a limit requirement of diethylene glycol and ethylene glycol, and requires GMP certificate for the production of pharmaceutical grade glycerin. Food grade glycerin standards are currently a bit fuzzy, usually using GB13206.
Crude glycerol generally refers to glycerol having a glycerin content of less than 93%. It is generally used to refine high-purity glycerol such as 95%, 98% and 99.5%. Refined glycerin is a general term and is classified into saponified glycerin, hydrolyzed glycerin and refined glycerin depending on the source of refined glycerin. Refined glycerin generally refers to cosmetic grade 99.5% glycerin, which is consistent with the Pharmacopoeia USP grade glycerin.
General glycerin refers to the concentration of 95 glycerol, generally used in industry, can not be used in cosmetics and pharmaceuticals, as well as in the food industry. Of course, refined glycerin can also be used as food grade glycerin, used in the food industry, and better as a drug. Grade glycerin for pharmaceuticals.
