Bisphenols / Epoxy derivatives

BADGE in the bedroom

Bisphenol A diglycidyl ether (BADGE) is the epoxy resin intermediate that links BPA to many of the products consumers don't realize contain bisphenols. Two phenols of BPA are reacted with epichlorohydrin to form BADGE, which then becomes the building block for the epoxy coatings on food can interiors, the resins in dental sealants, the protective coatings on metal surfaces, and a wide range of industrial and consumer epoxy applications. BADGE itself partially hydrolyzes back to BPA under environmental conditions, meaning BADGE-coated cans contribute to total BPA exposure even when BPA is not deliberately added.

This page is relevant for anyone trying to understand why the "BPA" family is broader than the single compound BPA — and why food can linings remain a meaningful exposure source despite progress in other product categories.

At a glance

Chemical familyBisphenol epoxy intermediate — diglycidyl ether of BPA
CAS number1675-54-3
ClassificationIARC Group 3 (not classifiable); California Proposition 65 listed for BADGE hydrolysis products as reproductive toxicants; EFSA established Tolerable Daily Intake of 0.15 mg/kg bw/day for BADGE + BADGE·H₂O + BADGE·2H₂O
Where you encounter itFood can lining epoxy resins, dental sealants, protective coatings on metal, electrical insulation, some construction materials
Sleep micro environment relevanceLower direct sleep-environment relevance than BPA, BPS, BPF; primary exposure via food contact and dust; can deposit on bedding via sweat at low concentrations
Activated carbon captureHigh — bisphenols and bisphenol derivatives generally adsorb well on activated carbon and β-cyclodextrin polymers

What it is

BADGE is a colorless to amber liquid that polymerizes to form the durable, chemically resistant epoxy resin coatings used widely in food packaging and industrial applications. The chemistry: epichlorohydrin reacts with two phenols of BPA to produce BADGE, which then cures with hardeners (typically amines) to form three-dimensional cross-linked polymer networks. The cured resin is mechanically tough and chemically stable, which is why it appears in applications that require both durability and food-contact safety.

The complication: BADGE hydrolyzes partially under environmental conditions to produce BADGE·H₂O (the mono-hydrolysis product) and BADGE·2H₂O (the di-hydrolysis product). These hydrolysis products can further degrade to release BPA. The European Food Safety Authority groups BADGE, BADGE·H₂O, and BADGE·2H₂O together in a single Tolerable Daily Intake assessment because of this metabolic relationship.

How it gets to the bedroom

From food contact materials

Food can interiors are the dominant BADGE exposure source for most people. Cans of tuna, soup, vegetables, beverages, and pet food typically have epoxy interior coatings to prevent direct food-metal contact. BADGE migrates from the coating into the food, particularly with acidic or fatty contents. The 2024 Jung et al. review of alternative plasticizers discussed similar migration patterns for non-bisphenol can-lining alternatives. Peer-reviewed

From dental materials

Some dental sealants and composite filling materials contain BADGE-derived resins. The migration into oral cavity and subsequent ingestion is documented in the dental materials literature; BADGE biomarkers spike in urine in the days following composite restorations.

From house dust

BADGE and its hydrolysis products appear in indoor dust at lower concentrations than BPA, BPS, or BPF, but with similar detection patterns and similar correlations with food-contact-material use.

From your own sweat (likely secondary)

By analogy to the Genuis 2012 BPA sweat-excretion data, BADGE and its hydrolysis products are plausibly excreted in sweat — though the specific BADGE measurement studies have not been performed. Inferred from Genuis 2012 BPA data; not directly measured for BADGE

What the research says

Documented health effects

BADGE and its hydrolysis products show endocrine activity in laboratory studies, including estrogen receptor binding. The full BADGE molecule has the additional concern of the reactive epoxide functional groups, which can form covalent adducts with biological nucleophiles. EFSA's Tolerable Daily Intake (0.15 mg/kg bw/day for the BADGE + hydrolysis product group) was established based on a 2-year rat oral toxicity study; the TDI provides regulatory cover for food contact applications.

The 2025 Hayasaka et al. ECHO Program analysis grouped bisphenols including BADGE precursors with phenols generally and found associations with elevated preterm birth and SGA risk. Peer-reviewed

Open questions

BADGE-specific human biomonitoring is less developed than for BPA or BPS. Most population-level exposure assessments include BADGE-related compounds in aggregated "bisphenol" exposure totals rather than tracking BADGE specifically.

What helps reduce exposure

Tier 1 — Most effective. Reduce reliance on canned foods. Fresh, frozen, and dry-packaged alternatives have lower BADGE exposure. For canned foods specifically, look for "BPA-free" and "BADGE-free" labels (when both are specified) or for cans with verified non-bisphenol linings such as oleoresin-based or polyolefin-based alternatives.

Tier 2 — Worth considering. Choose dental restoration materials without bisphenol resin where alternatives exist. Avoid heating canned food in the can; transfer to glass or stainless steel before reheating.

Tier 3 — Larger interventions. For households with documented chemical sensitivity, audit pantry products for BADGE-containing packaging.

The Embr capture system addresses BADGE and its hydrolysis products as part of the bisphenol family. The sleep environment is not the primary BADGE exposure route (food contact dominates), but capture of the residual portion that reaches bedding via dust and sweat is part of the integrated capture function.

What does NOT help

"BPA-free" can linings may still contain BADGE. The "BPA-free" designation typically means the can coating does not use BPA as a starting material. But BADGE-based epoxies that use the same chemistry can still be present. Reading the specific can coating disclosure (when available) is more reliable than the headline label.

Microwaving in plastic-lined containers accelerates BADGE migration. Heat increases migration from epoxy coatings into food.

Open research questions

  • BADGE-specific human biomonitoring needs further development to characterize background population exposure and inter-individual variability. Speculation
  • The relative contribution of BADGE versus its hydrolysis products to total bisphenol body burden in adults has not been quantified.

Citations

  1. European Food Safety Authority. BADGE Tolerable Daily Intake assessment. Regulatory
  2. International Agency for Research on Cancer. BADGE (Group 3 — Not classifiable for human carcinogenicity). IARC Monographs. Regulatory
  3. California Office of Environmental Health Hazard Assessment. Proposition 65 listing — BADGE hydrolysis products. Regulatory
  4. Hayasaka M et al. (2025). Association of Prenatal Exposure to Phthalates and Phenols With Adverse Pregnancy Outcomes. O&G Open. Peer-reviewed
  5. Jung J et al. (2024). Uses and occurrences of five major alternative plasticizers. Critical Reviews in Environmental Science and Technology. Peer-reviewed
  6. Genuis SJ et al. (2012). Human Excretion of Bisphenol A: Blood, Urine, and Sweat (BUS) Study. PMC3255175 Peer-reviewed — BPA-specific; BADGE inferred

Frequently asked questions

  • Is BADGE in my food cans?

    If the can has an epoxy interior coating, probably yes — unless the manufacturer has specifically switched to a non-bisphenol alternative such as oleoresin or polyolefin-based coatings. Major can manufacturers (Ball, Crown Holdings, Silgan) have moved partially toward non-bisphenol alternatives but disclosure varies by product. The Center for Environmental Health publishes periodic surveys of can lining composition by brand.

  • Does BADGE turn into BPA?

    Yes, partially. BADGE hydrolyzes in the environment to produce BADGE·H₂O and BADGE·2H₂O, which can further degrade to release BPA. The European Food Safety Authority groups BADGE and its hydrolysis products in a single Tolerable Daily Intake assessment for this reason.

  • Why don't more products mention BADGE on the label?

    Disclosure regulations for food contact materials focus on BPA as the parent compound. BADGE is a manufacturing intermediate and is not always disclosed in product labeling. The "BPA-free" label addresses the headline consumer concern without necessarily addressing the broader bisphenol epoxy family.

Related compounds

  • BPA — the parent compound; BADGE is its diglycidyl ether
  • BPS — BPA replacement
  • BPF — another BPA replacement
  • BFDGE — bisphenol F diglycidyl ether, analog of BADGE

This page describes documented chemistry and exposure pathways. It does not provide medical advice.

Last reviewed May 16, 2026.