Is Glyoxylic acid safe for babies and kids?
High risk for kidsInfants should not be exposed to glyoxylic acid products. Immature detoxification systems and developing airways increase vulnerability.
What is glyoxylic acid?
Glyoxylic acid is a alpha-keto acid, aldehyde acid, hair treatment chemical.
The IUPAC name is oxoacetic acid.
Also known as: oxoacetic acid, oxoethanoic acid, glyoxalic acid, formic acid aldehyde.
- IUPAC name
- oxoacetic acid
- CAS number
- 298-12-4
- Molecular formula
- C2H2O3
- Molecular weight
- 74.04 g/mol
- SMILES
- OC(=O)C=O
- PubChem CID
- 760
Risk for babies
High riskInfants should not be exposed to glyoxylic acid products. Immature detoxification systems and developing airways increase vulnerability.
Infants have immature hepatic metabolism and developing respiratory systems. Any formaldehyde exposure from nearby salon treatments could pose disproportionate risk.
Risk for pregnant and nursing people
High riskFormaldehyde exposure from thermal decomposition is of concern during pregnancy. Precautionary avoidance recommended.
Formaldehyde is a known human carcinogen (IARC Group 1) and reproductive toxicant at high exposures. Thermal decomposition of glyoxylic acid during hair treatments can release formaldehyde, which crosses the placenta. Multiple professional guidelines recommend avoiding keratin/smoothing treatments during pregnancy.
Regulatory consensus
4 regulatory and scientific bodies have classified Glyoxylic acid. The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| EU Cosmetics Regulation | — | Not specifically restricted; formaldehyde release products limited under Annex III entry 11a (max 0.2% free formaldehyde) | Products must be labeled 'contains formaldehyde' if formaldehyde concentration exceeds 0.05% |
| ANVISA | 2024 | Banned in hair straightening products | Brazil's ANVISA banned glyoxylic acid in hair straightening products due to formaldehyde release during thermal application |
| FDA | — | Warning letters issued | FDA issued warning letters to manufacturers of hair smoothing products containing glyoxylic acid marketed as 'formaldehyde-free' despite releasing formaldehyde when heated |
| OSHA | — | Formaldehyde PEL applies to salon environments | OSHA PEL for formaldehyde (0.75 ppm TWA) applies to salon workers during thermal hair treatments |
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 glyoxylic acid
-
Hair Care
— hair straightening treatments, keratin smoothing treatments, Brazilian blowout alternatives
Marketed as 'formaldehyde-free' hair straightening active ingredient
-
Cosmetics
— chemical peels, skin exfoliation products
Used at lower concentrations in dermatological treatments
-
Industrial
— vanillin production, pharmaceutical intermediates, textile finishing, agrochemical synthesis
Industrial use as chemical intermediate
Safer alternatives
Lower-risk approaches that achieve a similar outcome to Glyoxylic acid:
- Keratin amino acids (non-formaldehyde-releasing)
- Cysteine-based hair smoothing treatments
Frequently asked questions
Is glyoxylic acid safe for kids?
Infants should not be exposed to glyoxylic acid products. Immature detoxification systems and developing airways increase vulnerability.
What products contain glyoxylic acid?
Glyoxylic acid appears in: hair straightening treatments (hair care); keratin smoothing treatments (hair care); chemical peels (cosmetics); skin exfoliation products (cosmetics); vanillin production (industrial).
What should I do if my child is exposed to glyoxylic acid?
Keep infants away from salon environments where glyoxylic acid heat treatments are performed. Seek medical attention if exposure occurs.
Why do regulators disagree about glyoxylic acid?
Glyoxylic acid has been classified by 4 agencies including EU Cosmetics Regulation, ANVISA, FDA, OSHA, 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 Glyoxylic acid in the baby app
Look up products containing glyoxylic acid, compare to alternatives, and explore the full data record.
Open in baby View raw API dataReference 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 →