is the compendium of drugs, drug formulas, quality
standards and tests published by the United States Pharmacopeial Convention,
Inc., which also publishes the NF (National
Formulary). The purpose of the USP is to ensure drug uniformity and to
maintain and upgrade standards of drug quality and purity, as well as
establish packaging, labeling, and storage requirements. The USP includes
standards for white oils under two
classifications: "Mineral Oil" for heavy grades, and "Mineral Oil Light" for
lighter grades.
Link: www.usp.org