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Brief Description of Propylene glycol

Propylene glycol, also called propane-1,2-diol, is an organic compound with the chemical formula C3H8O2. It is a viscous colorless liquid which is nearly odorless but possesses a faintly sweet taste. Chemically it is classed as a diol and is miscible with a broad range of solvents, including water, acetone, and chloroform.. The CAS registry number is 57-55-6. Typical names are propylene glycol (PG) and monopropylene glycol (MPG). The propylene glycol can be manufactured in different grades. The most controlled grade is called propylene glycol-USP/EP and is manufactured and distributed according to high quality standards. The normal PG grade is called industrial grade. Both grades may be marketed under different trade names.


Propylene glycol USP/EP pharmaceutical grade & Industrial grade

Propylene glycol USP/EP (pharmaceutical grade) has a very high purity (i.e. absence of impurities) of more than 99,5% – which is extremely high for a chemical. Most important, though, is respecting hygiene regulations and Good Manufacturing Practice standards in the production, transport and further processing of propylene glycol.

In fact, the quality and purity of both industrial propylene glycol and propylene glycol USP/EP (pharmaceutical grade) is very high. In addition, for propylene glycol USP/EP intended for use in pharmaceutical applications, utmost care is placed on fulfilling the specific strict rules for the production, transport and hygiene of propylene glycol USP/EP to be used in sensitive applications like in food or cosmetics. TNJ Chemical does not support the use of industrial propylene glycol for use in pharma, food, animal feed and cosmetic/personal care applications.

Propylene glycol application in food, cosmetics, animal and others.

Propylene glycol is used in a large variety of daily products, such as in cosmetics and toiletries, food, animal feed, and pharmaceuticals, as well as in a number of industrial applications.


Propylene glycol USP/EP (pharmaceutical grade) has been safely used for decades in a large variety of consumer products, including more than 4000 cosmetics and toiletry products. Over this long period of time and large of variety of products there has been no evidence of such effects.

Propylene glycol is an approved feed material. However, whilst it is safe for use in cattle, dogs and poultry it shall not be used in cat feed. When fed with propylene glycol containing feed, cats show an increase in Heinz body formation, which are deformities of erythrocytes and shorten the life time of the red blood cells. This is unique to cats.


Propylene glycol use in electronic cigarettes.

TNJ Chemical doesn not suggest the use of propylene glycol in electronic cigarettes, nor in artificial (theatrical) fogs due to possible effects on the eye, nose, throat, and respiratory tract membranes as well as the absence of information on potential long term effects from prolonged inhalation of (fine) droplets of propylene glycol.

Hefei TNJ Chemical Industry Co.,Ltd. is professional Propylene glycol USP grade manufacturer and supplier from China for more than 15 year. If you want to buy Propylene glycol USP grade, please feel free to contact sales@tnjchem.com


Related reading:  Propylene glycol USP, Propylene glycol factory