Baby Safety / Compounds / Methyl isobutyl ketone (MIBK)

Is Methyl isobutyl ketone (MIBK) safe for babies and kids?

High risk for kids

Infants are vulnerable to Methyl isobutyl ketone (MIBK) through inhalation of volatile residues in household products. Immature blood-brain barrier and higher respiratory rate per body weight amplify CNS exposure.

What is methyl isobutyl ketone (mibk)?

Also known as: 4-Methyl-2-pentanone, METHYL ISOBUTYL KETONE, 4-Methylpentan-2-one, Isopropylacetone.

CAS number
108-10-1
Molecular formula
C6H12O
Molecular weight
100.16 g/mol
SMILES
CC(C)CC(=O)C
PubChem CID
7909

Risk for babies

High risk

Infants are vulnerable to Methyl isobutyl ketone (MIBK) through inhalation of volatile residues in household products. Immature blood-brain barrier and higher respiratory rate per body weight amplify CNS exposure.

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

Occupational and household exposure to Methyl isobutyl ketone (MIBK) during pregnancy is associated with developmental toxicity. Solvents readily cross the placenta and can cause fetal growth restriction.

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

1 regulatory bodyhas classified Methyl isobutyl ketone (MIBK).

AgencyYearClassificationNotes
Unknown——

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 methyl isobutyl ketone (mibk)

  • Industrial Facilities — paints, coatings, adhesives, extraction solvent

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Methyl isobutyl ketone (MIBK):

  • MEK (methyl ethyl ketone)
    Trade-offs: Alternative solvent or process chemistry; solvency parameters (Hansen solubility, Kb value) must be matched to application; VOC content and flammability may differ; worker exposure assessment needed.
    Relative cost: 1.2-2×
  • Water-based systems
    Trade-offs: Alternative solvent or process chemistry; solvency parameters (Hansen solubility, Kb value) must be matched to application; VOC content and flammability may differ; worker exposure assessment needed.
    Relative cost: 0.8-1.5×
  • Bio-based solvents
    Trade-offs: Alternative solvent or process chemistry; solvency parameters (Hansen solubility, Kb value) must be matched to application; VOC content and flammability may differ; worker exposure assessment needed.
    Relative cost: 2-5× conventional

Frequently asked questions

Is methyl isobutyl ketone (mibk) safe for kids?

Infants are vulnerable to Methyl isobutyl ketone (MIBK) through inhalation of volatile residues in household products. Immature blood-brain barrier and higher respiratory rate per body weight amplify CNS exposure.

What products contain methyl isobutyl ketone (mibk)?

Methyl isobutyl ketone (MIBK) appears in: paints (Industrial facilities); coatings (Industrial facilities).

What should I do if my child is exposed to methyl isobutyl ketone (mibk)?

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.

See Methyl isobutyl ketone (MIBK) in the baby app

Look up products containing methyl isobutyl ketone (mibk), compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (1)
  1. PubChem Compound Database (2026) — database

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 →