Guide
21 CFR 177: Food-Contact Polymer Compliance, Decoded
21 CFR Part 177 sets out the FDA clearance status of polymers intended for use in food-contact applications. A resin reaches market by one of three routes: an existing 177 listing (with all use limitations satisfied), a Food Contact Notification (FCN) effective for the named manufacturer, or a Threshold of Regulation (TOR) exemption. Customers — bottlers, packagers, processed food manufacturers — increasingly demand a Letter of No Objection (LNO) or compliance statement that survives technical scrutiny by their own regulatory teams. This guide walks the clearance routes, the migration and extractables expectations, and the documentation a 2026 buyer expects.
Start free trial Free trial, no credit card, onboard in days, not months.
The three clearance routes
Route 1: a polymer composition and use that falls fully within an existing 21 CFR 177 listing (e.g. 177.1520 olefin polymers, 177.1630 PET, 177.1390 cross-linked polyester, 177.2600 rubber articles). Route 2: a Food Contact Notification under 21 CFR 170.100 — effective only for the listed manufacturer and supplier, with specific use limitations. Route 3: a Threshold of Regulation exemption under 21 CFR 170.39 for components present at extremely low dietary exposure. A common error is treating an FCN held by a competitor as authority to sell the same chemistry — FCNs are not generic.
Conditions of use, food types and temperature
Every 177 listing carries Condition of Use letters (A–H per 21 CFR 176.170 Table 2) and applicable food types. A polymer cleared for Condition C (boiling water sterilisation, then room-temperature use) is not necessarily cleared for Condition A (high-temperature heat-sterilised, e.g. retort). LNOs that name the polymer but not the condition-of-use cell are technically incomplete. Buyers in the retort, hot-fill and microwaveable categories are now refusing to qualify resins without a specific condition-of-use statement.
Migration, extractables and the dietary exposure model
21 CFR 175–178 set out global and specific migration limits and the use of food simulants (water, 10 % ethanol, 50 % ethanol, food oil) at defined times and temperatures. FDA has not adopted a Plastics Regulation-style positive list, but the same dietary exposure modelling logic — concentration × consumption factor × food-type distribution factor — sits behind FCN safety reviews and behind every credible internal compliance statement. Buyers comparing US and EU suppliers expect to see the underlying migration data, not only a summary statement.
Change control, NIAS and recycled-content polymers
A change to a feedstock supplier, a catalyst, a colourant, an additive or a process condition can move a resin out of its cleared status. Non-Intentionally Added Substances (NIAS) — degradation products, impurities from feedstocks, reaction side-products — are an increasing FDA and EU focus, particularly for recycled-content streams seeking 21 CFR 177 clearance via the FDA recycled plastics non-objection process. The recurring finding is a quiet change in the upstream supply chain that nobody propagated through compliance.
A 60-day readiness path
Days 1–15: build the grade-to-clearance matrix (177 listing / FCN / TOR) with condition-of-use and food-type cells. Days 16–35: reconcile the matrix against the LNOs in circulation; retract any that misstate the clearance. Days 36–50: refresh the migration test plan against current food simulant and time/temperature expectations; document the dietary exposure model. Days 51–60: stand up supplier change control linked to the affected grades; rehearse a customer technical audit with a real FCN file as the worked example.
Where this lives in V5 Ultimate
The clauses above aren't theoretical — every one maps to a shipped module and an industry profile. Jump to the parts of the product that turn this guide into evidence on a Monday morning.
Modules that do the work
Industries this hits hardest
Frequently asked
Do I need an FCN if I match a competitor's product?
Yes — an FCN is specific to the notified manufacturer and supplier. Matching chemistry without an FCN, an existing 177 listing covering the use, or a TOR exemption is not a defensible position even if a competitor sells under an FCN.
How does EU 10/2011 compare to 21 CFR 177?
EU 10/2011 is a positive list (Union List) with specific migration limits per substance; 21 CFR 177 is a hybrid of polymer-class listings, FCNs and TORs. Suppliers serving both markets typically maintain parallel files rather than trying to crosswalk one to the other.
Does a 177 listing cover the additives?
Some 177 sections include additive limits; many require cross-reference to 21 CFR 178 (adjuvants, production aids and sanitizers). A clearance statement that names only the base polymer and ignores additives is technically incomplete.
Are recycled-content polymers separately regulated?
FDA does not issue 177 clearances for recycled processes per se — the agency issues a non-objection letter (NOL) for a specific recycling process producing food-contact material, after review of decontamination efficacy and surrogate testing. The NOL travels with the process, not the chemistry.
See it on your shop floor.
Free trial, no credit card, onboard in days, not months.