Baby Safety / Compounds / Fumaric acid (E297)

Is Fumaric acid (E297) safe for babies and kids?

Moderate risk for kids

Infants are more vulnerable to Fumaric acid (E297) than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What is fumaric acid (e297)?

The IUPAC name is (E)-but-2-enedioic acid.

Also known as: (E)-but-2-enedioic acid, fumaric acid, trans-Butenedioic acid, Allomaleic acid.

IUPAC name
(E)-but-2-enedioic acid
CAS number
110-17-8
Molecular formula
C4H4O4
Molecular weight
116.07 g/mol
SMILES
C(=CC(=O)O)C(=O)O
PubChem CID
444972

Risk for babies

Moderate risk

Infants are more vulnerable to Fumaric acid (E297) than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

Neonates and infants up to 12 months have incomplete blood-brain barrier development, immature Phase I/II metabolic enzymes (particularly CYP3A4, UGT1A1), and higher gastrointestinal permeability. Equivalent doses produce higher internal concentrations and longer residence times.

What to do: Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Risk for pregnant and nursing people

Context-dependent

Pregnancy alters the metabolism and distribution of Fumaric acid (E297), potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

No specific reproductive toxicity data identified, but pregnancy-specific safety data is limited for most chemicals. Precautionary minimization of exposure is recommended.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

3 regulatory and scientific bodies have classified Fumaric acid (E297). The classifications differ — that's the data.

AgencyYearClassificationNotes
IARC2014Not evaluated by IARC for carcinogenicity — Fumaric acid (E297; CAS 110-17-8; trans-butenedioic acid; the trans isomer of maleic acid) is FDA GRAS (21 CFR 172.350) and EU E297; JECFA ADI 'not specified'; EFSA opinion confirmed no safety concern at food use levels; no IARC, EPA, or EFSA carcinogenicity classification; fumaric acid is an endogenous metabolic intermediate — it is a required intermediate of the citric acid cycle (TCA cycle) produced by the enzyme fumarase from L-malate and consuming fumarase to produce L-malate; it is naturally present in many plants, particularly bolete mushrooms and fumitory (Fumaria officinalis — from which it was first isolated in 1832 by Winckler, giving it the name); in food applications, fumaric acid is the most acidic of the common food acids at equivalent concentration and the most cost-effective due to its solid (non-hygroscopic) form — properties that make it particularly valuable in dry food mixes, instant drinks, and food systems requiring a non-hygroscopic solid acid; fumaric acid and its dimethyl ester (dimethyl fumarate) are important pharmaceuticals — dimethyl fumarate (Tecfidera, Skilarence) is approved for relapsing multiple sclerosis and psoriasis
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 3 positive / 9 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 3 positive / 9 negative reports)

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where kids encounter fumaric acid (e297)

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Fumaric acid (E297):

  • Physical/mechanical pest control (IPM)
    Trade-offs: More labor-intensive. May not be sufficient for severe infestations.
    Relative cost: 1.2-2×

Frequently asked questions

Is fumaric acid (e297) safe for kids?

Infants are more vulnerable to Fumaric acid (E297) than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What products contain fumaric acid (e297)?

Fumaric acid (E297) appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

What should I do if my child is exposed to fumaric acid (e297)?

Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Why do regulators disagree about fumaric acid (e297)?

Fumaric acid (E297) has been classified by 3 agencies including IARC, EPA CTX / Genetox, EPA CTX / Genetox, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.

See Fumaric acid (E297) in the baby app

Look up products containing fumaric acid (e297), compare to alternatives, and explore the full data record.

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Sources (1)
  1. Fumaric Acid CAS 110-17-8 Trans-Butenedioic Acid C4H4O4 pKa1 3.03 pKa2 4.38 E297 FDA GRAS 21 CFR 172.350; EFSA ADI Not Specified; TCA Cycle Fumarase Succinate Dehydrogenase Complex II; Urea Cycle Argininosuccinate Lyase Purine Biosynthesis; Fumaria Officinalis First Isolated 1832 Winckler Bolete Mushroom; Non-Hygroscopic Solid Low Water Solubility 7 g/L Powdered Drink Mixes Dry Systems Advantage; Maleic Anhydride Isomerization Commercial Production Rhizopus Fungal; Dimethyl Fumarate DMF Tecfidera FDA 2013 RRMS Skilarence EU 2017 Psoriasis; Nrf2 Antioxidant Response Element HCAR2 GPR109A Agonist Mechanism; Fumarate Hydratase FH Gene Tumor Suppressor HLRCC Reed Syndrome Germline Mutation; Flushing GI Side Effects DMF Clinical (2014) — regulatory

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →