What does 21 CFR part 166 cover?

21 CFR Part 166: Margarine

Part 166 of title 21 runs to 2 sections across 2 subparts, and sits in subchapter B, Food for Human Consumption. Every section is reproduced in full and is current to 2026-09-10.

Sections: 2
Subparts: 2
Words of regulation: 1,599
Current to: 2026-09-10

Subpart A: General Provisions

166.40 Labeling of margarine13

Subpart B: Requirements for Specific Standardized Margarine

166.110 Margarine19

Read 21 CFR part 166 at the eCFR · All of 21 CFR for food safety

Questions

What does 21 CFR part 166 cover?: 21 CFR part 166 is Margarine. It runs to 2 sections across 2 subparts and sits in subchapter B of chapter I, Food for Human Consumption.

Every section of part 166 is a clause somebody has to produce evidence for at their next audit. Krolda maps supplier documents to the clause they satisfy in FSSC 22000, IFS Food and 21 CFR 117, and routes the corrective action when the evidence is missing.

Early access

Recall records come from the openFDA food enforcement API, published by the U.S. Food and Drug Administration in the public domain. Krolda adds the hazard classification and the clause mapping; neither is an FDA determination. Always check the FDA notice before acting on a recall.