Baby Safety / Compounds / Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a)

Is Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a) safe for babies and kids?

Elevated risk for kids

Infants are more vulnerable to Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a) 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 azodicarbonamide (ada; flour bleaching and maturing agent; e927a)?

The IUPAC name is (E)-carbamoyliminourea.

Also known as: (E)-carbamoyliminourea, Azodicarbonamide, Azodicarboxamide, Diazenedicarboxamide.

IUPAC name
(E)-carbamoyliminourea
CAS number
123-77-3
Molecular formula
C2H4N4O2
Molecular weight
116.08 g/mol
SMILES
C(=O)(N)N=NC(=O)N
PubChem CID
5462814

Risk for babies

Elevated risk

Infants are more vulnerable to Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a) 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 Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a), 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 Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a). The classifications differ — that's the data.

AgencyYearClassificationNotes
IARC2005Not evaluated by IARC for carcinogenicity as a completed substance — Azodicarbonamide (ADA; E927a; CAS 123-77-3; biurea diazene, 1,1'-azobisformamide) is FDA approved as a flour bleaching agent and dough conditioner/maturing agent in the USA (21 CFR 137.105, 21 CFR 172.806; max 45 ppm of flour); banned as a food additive in the European Union, United Kingdom, Australia, New Zealand, Canada, and many other jurisdictions; the EU prohibition is under Regulation (EC) No 1333/2008 (not assigned an approved E-number for food use in the EU, though E927a was historically allocated); the primary safety concern with ADA in food is not the compound itself but its reaction product semicarbazide (SEM; aminourea; CAS 563-41-7), which is formed when ADA reacts with bread dough components during baking; IARC has classified semicarbazide-hydrochloride (IARC 2001, Monograph 79) — semicarbazide was not classified as to human carcinogenicity (Group 3 for the hydrochloride) but showed increased lung tumor incidence in female mice at high oral doses; EFSA 2005 concluded that semicarbazide from ADA use is a concern requiring ongoing monitoring; no IARC classification for ADA itself
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 10 positive / 6 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 10 positive / 6 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 azodicarbonamide (ada; flour bleaching and maturing agent; e927a)

  • 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 Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a):

  • Inherently flame-resistant materials (wool, modacrylic, Nomex)
    Trade-offs: Higher material cost. Limited color/texture options.
    Relative cost: 1.2-2×
  • Barrier fabric technology
    Trade-offs: Adds manufacturing step and cost
    Relative cost: 1.2-2×

Frequently asked questions

Is azodicarbonamide (ada; flour bleaching and maturing agent; e927a) safe for kids?

Infants are more vulnerable to Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a) 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 azodicarbonamide (ada; flour bleaching and maturing agent; e927a)?

Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a) 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 azodicarbonamide (ada; flour bleaching and maturing agent; e927a)?

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 azodicarbonamide (ada; flour bleaching and maturing agent; e927a)?

Azodicarbonamide (ADA; flour bleaching and maturing agent; E927a) 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.

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Sources (1)
  1. Azodicarbonamide ADA CAS 123-77-3 C2H4N4O2 E927a FDA 21 CFR 172.806 ≤45 ppm Flour; Banned EU UK Australia NZ Canada; Semicarbazide SEM Aminourea 5-50 ppb Baked Bread Baking Reaction By-Product; EFSA 2005 MOE Adults Not Immediate Concern Infant Baby Food Concern Precautionary; Semicarbazide NTP Female Mouse Lung Adenoma High Dose; IARC Group 3 Semicarbazide-HCl Monograph 79 2001; Fast-Acting Oxidant Bleach Carotenoids Disulfide Bonds vs Bromate Slow; Industrial Blowing Agent PVC Foam Yoga Mat 200°C Thermal Decomposition Different Chemistry; Food Babe Vani Hari 2014 Subway Petition Removal; FDA No Ban Action; Occupational Asthma Asthmagen NIOSH Baker's Asthma; Ascorbic Acid Calcium Peroxide L-Cysteine Safer Alternatives (2005) — 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 →