CFR›Title 21›Chapter I›Part 640›21 CFR Part 640 Subpart I Citation21 CFR Part 640 Subpart IContainsSections § 640.90–§ 640.94CorpusDaily eCFRDisplayed edition2026-08-04Last updated2026-08-04 Subpart I—Plasma Protein Fraction (Human) Sections § 640.90 § 640.90 Plasma Protein Fraction (Human). § 640.91 § 640.91 Processing. § 640.92 § 640.92 Tests on final product. § 640.93 § 640.93 General requirements. § 640.94 § 640.94 Labeling. Authority21 U.S.C. 321, 351, 352, 353, 355, 360, 371; 42 U.S.C. 216, 262, 263, 263a, 264.Source42 FR 27583, May 31, 1977, unless otherwise noted.