CFR › Title 21 › Part 111 › §111.46021 CFR §111.460Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)You must identify and hold in-process material under conditions that protect against mixup, contamination, and deterioration.(b)You must hold in-process material under appropriate conditions of temperature, humidity, and light.