USP 30–NF 25 contains approximately 4,100 monographs and more than 200 General Tests and Assays (General Chapters numbered 1,000 and below) and General Information Chapters (numbered above 1,000). General Chapters provide frequently cited procedures, sometimes with acceptance criteria, in order to compile into one location repetitive information that appears in many monographs. New and revised monographs and General Chapters and obsolete matter deleted from this edition are indicated on page xxxviii in the Admissions section.