Fragrance avoidance
No fragrance-linked caution surfaced in the current profile.
This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.
Boron oxide (B2O3)
Diboron trioxide; boric oxide is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.
Research docs0Claims0Sources7FunctionChemical reaction regulator • glazeIdentifier1303-86-2
Concern score
100/100Critical concern driven by cmr.
Well researched
How we scored this
The concern value reflects this ingredient's chemical identity — its hazard profile from the published classifications and regulatory status below — not the safety of a product it appears in. A score near 40 is the baseline for ingredients with no specific signal (water scores 40 by design), so a mid-range value is not a safety verdict.
Concern score 100/100 (critical) · high confidence.
Regional restrictions
- EU — banned · Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products. CMR: Reprotoxic Cat. 1B()
Where it appears
Prevalence of Boron oxide (B2O3) in our catalog (epa_cpdat).
Products
726
Brands
6
Furniture and furnishingsSpecialty occupational productsLaboratory suppliesBatteriesRaw materialsIndustrial products
Typical roles
Chemical reaction regulatorglazeStabilizing agent
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Good fit
Evidence read
The published evidence profile currently shaping this ingredient record.
No evidence profiles are attached to this ingredient yet.
Linked research
Primary documents currently linked to this ingredient record.
No linked research documents are attached to this ingredient yet.
Extracted claims
Structured claim signals pulled from linked ingredient research.
No extracted claims are attached to this ingredient yet.
Regulatory status
Published jurisdiction-level classifications and regulatory designations for this ingredient.
EU
EC
Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products. CMR: Reprotoxic Cat. 1B()
Effective: 2020-07-30View source →
US
EPA
EPA CPDat observed this chemical in 726 composition records across product categories including Furniture and furnishings, Specialty occupational products, Laboratory supplies. EPA CPDat classifies this chemical for functional uses including glaze, Chemical reaction regulator, Stabilizing agent.
Effective: march 23, 2017View source →
US
FDA