Food use
Food-use source coverage is present in the current record.
The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.
Octamethylcyclotetrasiloxane
Octamethylcyclotetrasiloxane; D4 is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.
Research docs0Claims0Sources6Functioncomponent of silicone gasketing options • component of silicone gasketing options.Identifier556-67-2
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. 2()
Where it appears
Prevalence of Octamethylcyclotetrasiloxane in our catalog (epa_cpdat).
Products
130
Brands
6
Construction and building materialsIndustrial productsRaw materialsHome maintenancePersonal careVehicle
Typical roles
component of silicone gasketing optionscomponent of silicone gasketing options.component of silicone threshold optionscomponent of silicone threshold options.
Catalog
Found in these products
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Good fit
Fragrance avoidance
No fragrance-linked caution surfaced in the current profile.
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. 2()
Effective: 2020-07-30View source →
US
EPA
EPA CPDat observed this chemical in 130 composition records across product categories including Construction and building materials, Industrial products, Raw materials. EPA CPDat classifies this chemical for functional uses including Solvent, Surfactant (surface active agent), Processing aids not otherwise specified.
Effective: march 27, 2017View source →
US
FDA
