Classification
Product TypeIngredient
Product FormSolid or Liquid (depending on molecular weight grade)
Industry PositionFood Additive / Multipurpose Additive (carrier/coating/glazing applications)
Market
Polyethylene glycol (PEG) is a synthetic polyether polymer used in global food and supplement supply chains as a regulated additive (Codex INS 1521; EU E 1521) with functionality focused on coating/carrier and related technological roles. Codex provisions list uses in food supplements, chewing gum, tabletop sweeteners, certain water-based flavoured drinks, and as a surface treatment on fresh fruit, while EU authorisation is tightly framed around capsule and tablet forms. In the United States, PEG (mean molecular weight 200–9,500) is permitted for defined food uses (e.g., coating/binder/lubricant roles in food tablets and as an adjuvant in certain preparations) with explicit impurity controls. Supply availability and qualification for “food-grade” trade is shaped less by agricultural seasonality and more by regulatory conformity to additive specifications (JECFA/EU/FDA) and purity/contaminant limits.
Specification
Major VarietiesPEG 400, PEG 3000, PEG 3350, PEG 4000, PEG 6000, PEG 8000
Physical Attributes- Clear, viscous, hygroscopic liquid at lower molecular weights (e.g., PEG 400)
- White to almost white waxy solids/flakes/free-flowing powders at higher molecular weights (e.g., PEG 3000–8000)
Compositional Metrics- Mean/average molecular weight is the primary commercial identifier (food additive specifications cover roughly the ~200–9,500 Da range depending on jurisdiction/specification)
- Controlled low-molecular-weight glycols (e.g., ethylene glycol and diethylene glycol) are explicitly limited in some food additive regulations/specifications
Grades- Codex INS 1521 (Polyethylene glycol) — GSFA provisions by food category and maximum level/GMP
- EU E 1521 — purity/specification set under Regulation (EU) No 231/2012
- United States — 21 CFR 172.820 (Polyethylene glycol, mean molecular weight 200–9,500) for specified food uses
Packaging- Bulk liquids typically shipped in drums, intermediate bulk containers (IBCs), or bulk tankers (grade and viscosity dependent)
- Solid/flaked grades typically shipped in lined bags, cartons, or drums
ProcessingWater-soluble across many PEG grades; solubility and handling characteristics vary with molecular weightUsed in food-related applications primarily as a carrier/coating/glazing-type material where permitted by regulation
Supply Chain
Value Chain- Ethylene oxide + water polymerisation (PEG manufacture) → purification to meet additive specifications → quality testing (molecular weight/impurities) → packaging → industrial distribution to food/supplement manufacturers
Demand Drivers- Regulated use as INS/E 1521 for capsule/tablet and selected food-category applications (where permitted)
- Need for consistent, specification-conformant carrier/coating functionality in supplement and specialty food applications
Temperature- Handling requirements vary by molecular weight: lower-MW grades are viscous liquids while higher-MW grades are waxy solids/flakes/powders, influencing pumpability and storage/transport practices
Risks
Food Safety HighOff-spec impurities (notably low-molecular-weight glycols referenced in some regulations/specifications) can make PEG non-compliant for food use and trigger shipment rejection, product recalls, or loss of supplier approval, disrupting trade flows for food-grade material.Contract to the target jurisdiction’s specification (e.g., JECFA/EU/FDA), require lot-level certificates of analysis for molecular weight and regulated impurities, and qualify suppliers with audited quality systems.
Regulatory Compliance MediumPermitted uses and maximum levels for polyethylene glycol (INS/E 1521) differ by jurisdiction and food category (e.g., Codex GSFA provisions vs. EU’s capsule/tablet framing), creating a high risk of formulation non-compliance or misapplication across markets.Maintain a jurisdiction-by-jurisdiction use-permission matrix (Codex/EU/US and key destination rules) and implement label/spec review at formulation sign-off.
Industrial Supply Disruption MediumPEG availability for food-grade applications depends on upstream industrial production and purification capacity; operational incidents or regulatory constraints affecting ethylene oxide-based production can tighten supply and extend lead times for specification-grade material.Dual-qualify producers and distributors, maintain safety stock for specialty grades, and pre-book supply for regulated applications with long validation cycles.
Sustainability- Manufacture is based on industrial ethylene oxide chemistry; process safety and emissions control expectations can affect operating reliability and permitting for upstream facilities
- Specification-driven trade (JECFA/EU/FDA) can increase qualification burdens and create discard/waste risk for off-spec material
FAQ
What is polyethylene glycol used for in food according to Codex (INS 1521)?Codex GSFA lists polyethylene glycol (INS 1521) with functional classes such as antifoaming agent, carrier, emulsifier, glazing agent, and thickener, with provisions including use in food supplements, chewing gum, tabletop sweeteners, certain water-based flavoured drinks, and as a surface treatment on fresh fruit (GMP).
Why does “molecular weight grade” matter for polyethylene glycol in trade?Specifications and product identity are tied to molecular weight (e.g., PEG 400 vs PEG 6000), and physical form changes with grade (lower molecular weights are viscous liquids while higher molecular weights are waxy solids), which affects handling and the exact specification a buyer or regulator expects.
What are common buyer specification checkpoints for food-grade PEG?Buyers typically specify the PEG grade (molecular weight), conformance to an applicable additive specification (e.g., JECFA and/or EU specification for E 1521, and/or US 21 CFR 172.820 where applicable), and impurity controls that are explicitly regulated in some jurisdictions (including limits on ethylene glycol and diethylene glycol in US rules).