FDA-Compliant Polymers for Food Contact: A Buyer's Checklist

When a polymer is going into a food-contact application — a milk bottle, a microwave tray, a beverage cap liner — the buyer needs more than the producer’s word that it is "food-grade." They need a regulatory citation. In the United States that means FDA 21 CFR 177. In the EU it means EU 10/2011. The two frameworks are similar in spirit but not identical in their additive lists.

What FDA 21 CFR 177 covers#

Each polymer family has its own sub-section: 177.1520 covers olefin polymers (PE, PP), 177.1640 covers polystyrene, 177.1500 covers polyamides, 177.1580 covers polycarbonates. Each section lists the polymer specification limits and the permitted additive substances.

A producer claiming compliance will reference the exact sub-section on the CoA — "complies with 21 CFR 177.1520" — and confirm that all additives in the formulation are also listed in the relevant FDA inventories (CFR 178 for indirect-contact substances). The Food Contact Notification (FCN) inventory is the running list of substances cleared since 2000.

Where the EU framework differs#

EU 10/2011 sets a positive list of monomers and additives, plus migration limits. The migration limits are tested by simulating contact with food-mimicking solvents (acidic, fatty, alcoholic, dry) at controlled temperatures. The maximum overall migration is 10 mg/dm² of food-contact surface, and there are specific migration limits (SMLs) for individual substances.

EU and US frameworks usually overlap. They diverge most often on heavy-metal limits, on phthalate restrictions, and on the use of recycled content in food-contact polymers — the EU EFSA opinion process for recycled PE/PET is stricter than the FDA letter-of-no-objection route.

What to verify on the CoA#

• —Specific CFR sub-section cited (e.g. 177.1520 for olefins)
• —Confirmation that all colourants and additives are FDA-listed for food contact
• —EU 10/2011 statement with declared migration limits if shipping into Europe
• —Heavy-metal residual content (lead, cadmium, mercury, chromium) below the food-contact threshold
• —Any temperature or food-type restrictions — "hot fill up to 100 °C" vs "ambient only"

Food-contact compliance is one of the few quality checks that survives downstream all the way to the consumer. A failed audit at the brand owner’s site walks back through every customer in the chain. Read the CoA carefully; confirm the citation, not just the sentence.