Baby Safety / Compounds / Tinuvin 328

Is Tinuvin 328 safe for babies and kids?

High risk for kids

Infants are more vulnerable to Tinuvin 328 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 tinuvin 328?

The IUPAC name is 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylethyl)phenol.

Also known as: 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylethyl)phenol, Benzotriazole UV absorber, 2-2H-Benzotriazol-2-yl 4,6-bis(1,1-dimethylethyl)phenol, 2-equatorial-Hydroxy-2-axial-(4-trifluorophenyl)quinolizidine.

IUPAC name
2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylethyl)phenol
CAS number
25973-55-1
Molecular formula
C20H26N3O
Molecular weight
324.44 g/mol
SMILES
C1CCN2CCC(CC2C1)(C3=CC=C(C=C3)C(F)(F)F)O
PubChem CID
93755

Risk for babies

High risk

Infants are more vulnerable to Tinuvin 328 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 Tinuvin 328, 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

2 regulatory and scientific bodies have classified Tinuvin 328. The classifications differ — that's the data.

AgencyYearClassificationNotes
REACH——Not SVHC but under scrutiny for reproductive toxicity
EU——Restricted in cosmetics due to reproductive concern

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 tinuvin 328

  • plastics
  • coatings
  • polymers
  • fibers
  • adhesives

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Tinuvin 328:

  • Bio-based plasticizers (epoxidized soybean oil, citrate esters)
    Trade-offs: Alternative approach; specific tradeoffs depend on application context, scale, and regulatory requirements. Full hazard assessment of alternative recommended before adoption to avoid regrettable substitution.
    Relative cost: 2-5× conventional
  • Non-phthalate plasticizers (DINCH, DEHT) where phthalates are currently used
    Trade-offs: Alternative approach; specific tradeoffs depend on application context, scale, and regulatory requirements. Full hazard assessment of alternative recommended before adoption to avoid regrettable substitution.
    Relative cost: 1.2-2×
  • Additive-free polymer formulations where performance allows
    Trade-offs: Alternative approach; specific tradeoffs depend on application context, scale, and regulatory requirements. Full hazard assessment of alternative recommended before adoption to avoid regrettable substitution.
    Relative cost: Lower (ingredient elimination)

Frequently asked questions

Is tinuvin 328 safe for kids?

Infants are more vulnerable to Tinuvin 328 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 tinuvin 328?

Tinuvin 328 appears in: plastics; coatings; polymers.

What should I do if my child is exposed to tinuvin 328?

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.

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Sources (2)
  1. PubChem Compound CID 93755 — database
  2. ATSDR Toxicological Profile — CAS 25973-55-1 — reference

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 →