VeriMomShould I Avoid basic blue 9 During Pregnancy? | VeriMom
Reviewed by VeriMom Editorial Team · Last reviewed
ECHA regulatory hazard statements
- •H361
Products containing basic blue 9 — check your shelf
These products list basic blue 9 on their INCI. If one is in your routine, consider swapping it during pregnancy.
What to use instead
Pregnancy-safe ingredients that serve a similar function:
Pregnancy-safe products to use instead
Products built around the safer ingredients above, scored "no known risks" or "low risk".
Sources & references
Authoritative references used to score this ingredient.
Pregnancy-Safe Alternatives to basic blue 9 | VeriMom
Ingredients — Pregnancy-Safe Ingredients Database — 28,000+ Ingredients Rated
See also
FAQ
- Is basic blue 9 safe during pregnancy?
- Methylene blue (Basic Blue 9, CAS 61-73-4) is associated with documented fetal harm after intra‑amniotic exposure (case series of jejuno‑ileal/intestinal atresia and fetal death); regulatory/clinical sources note teratogenic risk and recommend avoiding intra‑amniotic use in pregnancy. ECHA record references a harmonised/suspected reproduction hazard (H361) for this substance, and clinical teratology reviews/monographs (UKTIS, StatPearls, PubMed case reports) describe the fetal risks. Topical cosmetic use would give low but measurable systemic exposure only, so pregnancy exposure from normal topical use is judged low but not zero. (Sources: ECHA substance info; UKTIS monograph; PubMed case reports; StatPearls.)
- Is basic blue 9 safe while breastfeeding?
- There are no strong human data specifically about transfer into breast milk, but given systemic use can produce fetal/ neonatal effects and that methylene blue is systemically active, a conservative rating is maintained (suspected reproductive hazard). Clinical guidance cautions use in pregnancy; breastfeeding exposure potential is unknown but systemic maternal exposure could result in transfer—therefore exposure from typical topical cosmetic use is likely low but measurable. (Sources: UKTIS, StatPearls, PubMed case literature.)
- Is basic blue 9 safe for baby skin?
- Infant-specific evidence of increased sensitivity is lacking; however because the ingredient has measurable absorption in humans and is systemically active, the exposure score for baby skin is increased by +1 versus adult (immature barrier and higher surface‑area:weight). No infant‑topical studies showing unique teratogenicity were found, so hazard/mechanism scores are not increased beyond the pregnancy assessment. (Sources: PubMed case reports; UKTIS; general toxicology summaries.)
- How does VeriMom score basic blue 9?
- VeriMom scores basic blue 9 at 20/100 (high risk) based on EU CosIng status, ECHA hazard classifications, and peer-reviewed PubMed studies. Our scoring pipeline is fully transparent.
- What are pregnancy-safe alternatives to basic blue 9?
- See our curated list of pregnancy-safe alternatives to basic blue 9 based on similar function and a no-known-risks safety band.
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Medical Disclaimer
This information is for educational purposes only and does not constitute medical advice. Safety scores are based on publicly available data and may not reflect all risks. Always consult your healthcare provider before using any product during pregnancy or breastfeeding.