A technical guide to active packaging technologies — oxygen scavengers, antimicrobial films, moisture and ethylene control — and the FDA food contact substance regulatory pathway that governs them.

Executive Summary

Active packaging refers to packaging systems designed to deliberately interact with a food product or its internal environment — scavenging oxygen, releasing antimicrobials, absorbing moisture or ethylene, or otherwise altering conditions inside the package — rather than simply providing an inert barrier. It has become a standard tool for extending shelf life in oxidation-prone, moisture-sensitive, or ethylene-sensitive foods. This guide covers the main active packaging technology categories, how they connect to the food chemistry (particularly lipid oxidation) they are designed to control, the FDA regulatory pathway that governs any substance used in this way, and current 2026 developments in food contact substance oversight relevant to packaging teams.

Introduction

Active packaging sits at the intersection of food chemistry, materials science, and food contact regulation. Because active packaging systems are, by definition, intended to interact with food (unlike traditional inert barrier packaging), they are treated under U.S. law as food contact substances subject to premarket authorization — a distinction packaging and regulatory teams need to track carefully when adopting new systems or switching suppliers.

Scientific Background: What “Active” Means in Packaging

Packaging technology is generally grouped into three categories:

Passive (conventional) packaging — provides a barrier function only (moisture, oxygen, light) without deliberately interacting with the food.
Active packaging — deliberately interacts with the food or headspace to extend shelf life, improve safety, or maintain quality (e.g., absorbing oxygen, releasing an antimicrobial, absorbing moisture or ethylene).
Intelligent packaging — monitors and communicates information about the condition of the food or package environment (e.g., time-temperature indicators, freshness indicators) without necessarily altering the food itself. Intelligent packaging is a related but distinct category from active packaging, and the two are sometimes combined.

Technical Discussion: Major Active Packaging Technology Categories

Oxygen Scavengers

Oxygen scavenger sachets or incorporated-film systems remove residual oxygen from the package headspace, most commonly using iron-based reduction chemistry, though enzymatic and other chemistries also exist. Oxygen scavengers are the most directly relevant active packaging category to the fatty acid chemistry discussed elsewhere in this knowledge base: because lipid oxidation is fundamentally a reaction between unsaturated fatty acids and oxygen, removing headspace oxygen slows the initiation and propagation stages of that reaction, directly extending the oxidative shelf life of PUFA-rich products such as nuts, snack foods, and oil-containing baked goods.

Moisture Regulators

Desiccants and moisture-absorbing sachets or films control internal package humidity, protecting against caking, microbial growth, and texture loss in moisture-sensitive products. This category interacts closely with a food’s water activity — the topic most relevant to intermediate moisture foods — since active moisture control can meaningfully shift the effective water activity a product experiences over its shelf life even when the formulated water activity is unchanged.

Antimicrobial Packaging

Antimicrobial packaging incorporates or releases compounds (e.g., organic acids, bacteriocins, essential oil components, silver ion systems) that inhibit microbial growth on the food surface or within the package environment. This is distinct from a food additive added directly to the formulation — because the antimicrobial resides in or migrates from the packaging material, it is regulated as a food contact substance rather than as a food ingredient, even though its intended technical effect is on the food.

Ethylene Absorbers

Ethylene-absorbing sachets or incorporated materials (commonly using potassium permanganate or activated clay/zeolite systems) reduce ethylene buildup in packages containing fresh produce, slowing ripening and senescence in ethylene-sensitive fruits and vegetables.

Carbon Dioxide Emitters/Scavengers and Modified Atmosphere Systems

Some active systems release or absorb carbon dioxide to maintain a target modified atmosphere inside flexible packaging over time, compensating for gas exchange through the packaging film or product respiration, which purely passive modified-atmosphere packaging (MAP) cannot do on its own.

Regulatory Pathway: Why Active Packaging Is Regulated Differently

Because active packaging components are intended to have a technical effect on food — unlike inert barrier packaging — U.S. law treats them as food contact substances (FCS), and any FCS that meets the legal definition of a food additive must be authorized before marketing. There are several possible regulatory routes:

Pathway	Description
Food Contact Notification (FCN)	The most common current route; a manufacturer submits safety data to FDA for a specific substance and intended use, and after review the substance becomes an “effective” FCN, generally usable only by the notifying company (and successors) for that specific use.
Direct food additive regulation (21 CFR Part 172 etc.)	Substances approved through the traditional food additive petition process, generally available to any manufacturer for the approved use, not limited to a single notifier.
GRAS (Generally Recognized As Safe)	Applicable where a substance’s safety is either established through a long history of safe use or a consensus of qualified experts; can apply to certain packaging-related substances such as some antioxidants.
Prior sanction	A small, closed category of uses sanctioned by FDA or USDA before 1958, still legally recognized today for those specific historical uses.
Threshold of Regulation (TOR) exemption	Available for substances used at very low levels with negligible expected dietary exposure, allowing certain low-migration packaging additives to be marketed without a full FCN.

FDA maintains a public Inventory of Effective Food Contact Substance Notifications, which packaging engineers and regulatory teams should check directly when evaluating a new active packaging component, since authorizations are frequently use- and sometimes notifier-specific.

2026 Regulatory Developments Relevant to Active and Food Contact Packaging

Packaging and regulatory teams should be aware of several active developments as of mid-2026:

FDA safety reassessments of legacy antioxidants: FDA opened a Request for Information (RFI) in February 2026 reviewing the safety data and current authorizations for BHA (butylated hydroxyanisole) as both a direct food additive and a food contact substance, followed by RFIs in May 2026 for BHT (butylated hydroxytoluene) and azodicarbonamide (ADA). These substances have historical relevance to oxidation control in both food formulations and packaging materials, so companies relying on them (directly or via packaging additives) should monitor for potential regulatory action following FDA’s review of stakeholder comments.
Proposed federal packaging chemical restrictions: The No Toxic Chemicals in Food Packaging Act of 2026 (H.R. 9231 / S. 4724), introduced in June 2026, would ban 15 chemicals or chemical classes — including PFAS, ortho-phthalates, and bisphenol A — from food-contact use if enacted. As of this writing the bill remains in committee and has not been enacted; companies should track its progress rather than treat it as current law.
EU packaging PFAS limits: Under the EU Packaging and Packaging Waste Regulation (PPWR), which becomes fully applicable August 12, 2026, food-contact plastic packaging placed on the EU market must meet specific PFAS limits (generally cited as 25 ppb for individual targeted PFAS, 250 ppb for the sum of targeted PFAS, and 50 ppm total fluorine), with no sell-through allowance for noncompliant existing inventory. Companies exporting active or conventional packaging into the EU market should confirm compliance well ahead of that date.

Best Practices for Food Manufacturers and Packaging Teams

Treat any active packaging component (scavenger, antimicrobial, absorber) as a food contact substance requiring its own regulatory verification — do not assume packaging-supplier assurances substitute for checking FDA’s FCN inventory or requesting the specific authorization reference.
Match active packaging technology selection to the dominant spoilage mechanism identified in shelf-life testing (oxidative rancidity → oxygen scavengers/antioxidant systems; moisture migration → desiccants; microbial surface growth → antimicrobial systems; ripening → ethylene absorbers), rather than adopting a single technology across an entire portfolio.
Track pending federal and state packaging chemical legislation (e.g., PFAS-related bills) even before enactment, since reformulation and requalification timelines for packaging materials are typically long.
For companies selling into both U.S. and EU markets, align packaging material qualification programs to the more stringent applicable requirement (e.g., EU PPWR PFAS limits) where feasible, to avoid maintaining fully separate material qualifications.
Revisit antioxidant and packaging additive choices that rely on BHA, BHT, or ADA in light of FDA’s ongoing safety reassessment, and begin evaluating alternative systems proactively rather than reactively.

Frequently Asked Questions

What’s the difference between active and intelligent packaging? Active packaging deliberately changes conditions inside the package (e.g., removing oxygen); intelligent packaging monitors and communicates information about the food or package condition (e.g., a freshness indicator) without necessarily altering it, though the two are sometimes combined in a single system.

Are oxygen scavengers considered food additives? Oxygen scavengers are regulated as food contact substances because they are intended to have a technical effect related to the food, even though they typically reside in a sachet or packaging layer rather than being added directly to the formulation; a specific scavenger chemistry generally requires its own FDA authorization (most often via FCN) for its intended use.

Does active packaging replace the need for antioxidants in the food formulation? Not necessarily — active packaging (particularly oxygen scavenging) and formulation-level antioxidants address the same underlying oxidation chemistry through different mechanisms and are often used together, particularly in higher-PUFA products where oxidative risk is elevated.

Is BHA or BHT currently banned in the U.S.? No — as of this writing, FDA has opened safety reassessments (RFIs) for BHA, BHT, and ADA but has not announced a ban; companies should monitor FDA’s docket for outcomes rather than assume current authorizations have changed.

Do U.S. active packaging rules apply the same way for exports to the EU? No — the EU has its own food contact material framework, and packaging exported to the EU must separately meet EU requirements, including the PPWR’s PFAS limits taking full effect August 12, 2026, regardless of U.S. FDA status.

Key Takeaways

Active packaging is legally and functionally distinct from passive barrier packaging because it is designed to interact with the food, which brings it under food contact substance regulation.
Oxygen scavenger technology connects directly to the lipid oxidation chemistry that governs shelf life in PUFA-rich foods, making packaging and formulation strategy interdependent decisions rather than separate ones.
FDA authorizes active packaging substances primarily through Food Contact Notifications, alongside the older direct food additive, GRAS, prior sanction, and Threshold of Regulation pathways.
2026 has brought active regulatory reassessment of legacy antioxidants (BHA, BHT, ADA), a pending federal bill targeting PFAS and other packaging chemicals, and a hard EU PFAS compliance deadline (August 12, 2026) — all worth tracking even before final action.
Packaging technology selection should be matched to the specific dominant spoilage mechanism for a given product rather than applied uniformly.

Conclusion

Active packaging is most effective when treated as an extension of a product’s chemistry and shelf-life strategy rather than a standalone packaging decision — the same lipid oxidation, water activity, and microbial growth mechanisms that drive formulation and testing choices should drive packaging technology selection. At the same time, because active systems are regulated as food contact substances with their own, sometimes notifier-specific authorizations, packaging teams need a regulatory verification step that is just as rigorous as their technical performance evaluation, particularly as legacy antioxidants face renewed FDA scrutiny and packaging chemical legislation continues to move at both the federal and EU level.

References

U.S. FDA. Food Packaging & Other Substances that Come in Contact with Food. fda.gov/food/food-ingredients-packaging/food-packaging-other-substances-come-contact-food-information-consumers
U.S. FDA. Inventory of Effective Food Contact Substance Notifications. fda.gov/fcs-notifications
PackagingLaw.com. FDA Reassessments Underway for Substances Used in Food and Food Packaging (2026 BHA/BHT/ADA RFIs).
Verdant Law. Federal Legislation Would Deem 15 Chemicals Unsafe in Food Packaging (No Toxic Chemicals in Food Packaging Act of 2026 summary).
REACH24H. US FDA FCN Update: New Effective Food Contact Notifications, March–May 2026.
EU Packaging and Packaging Waste Regulation (PPWR) — PFAS limits applicable August 12, 2026.