Propylene glycol USP/EP (pharmaceutical grade) is the propylene glycol grade that meets the strict product quality and handling standards. These standards are required by the authorities responsible for consumer health and safety of materials used in health-sensitive applications, such as pharmaceuticals, foodstuffs, cosmetics and animal feed. These quality requirements are specifically described in the Pharmacopoeias while handling requirements are prescribed in governmental regulation and industry guidelines.
Propylene glycol USP/EP (pharmaceutical grade) is used as a non-active, "enabling" agent (excipient)
A Pharmacopoeia is the official document that lays down strict rules for quality and analytical testing of substances applied in pharmaceuticals.
In technical terms, pharmaceutical grade propylene glycol is called USP/EP - the abbreviation for United States-Pharmacopoeia and European Pharmacopoeia.
Propylene Glycol USP/EP (PG USP/EP) complies with the detailed quality specifications for propylene glycol.