21 CFR § 610.16 - Total solids in serums.

---
identifier: "/us/cfr/t21/s610.16"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 610.16 - Total solids in serums."
title_number: 21
title_name: "Food and Drugs"
section_number: "610.16"
section_name: "Total solids in serums."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "F"
subchapter_name: "BIOLOGICS"
part_number: "610"
part_name: "GENERAL BIOLOGICAL PRODUCTS STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321, 331, 351, 352, 353, 355, 360, 360c, 360d, 360h, 360i, 371, 372, 374, 381; 42 U.S.C. 216, 262, 263, 263a, 264."
regulatory_source: "38 FR 32056, Nov. 20, 1973, unless otherwise noted."
cfr_part: "610"
---


# 610.16 Total solids in serums.

Except as otherwise provided by regulation, no liquid serum or antitoxin shall contain more than 20 percent total solids.