Is Dimethiconol safe in cosmetics?
Dimethiconol has a safety rating of "GOOD" in our database. EU status: permitted. US status: permitted.
Dimethiconol
INCI: DIMETHICONOL
Dimethiconol (CAS 70131-67-8) is a cosmetic cosmetic ingredient functioning as film-forming, hair conditioning, emollient, long-wear binder. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database.
View industrial chemical safety profile for CAS 70131-67-8 →
Auto-generated CPSR Part A draft with source citations
Function
film-forming, hair conditioning, emollient, long-wear binder
Safety Rating
GOOD
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
No FDA restriction; high-MW silicone gum considered safe at cosmetic use levels; not separately restricted
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Dimethiconol.
Calculate MoS for your specific formulation with the MoS Calculator.
Dermal Penetration Profile
Skin absorption and penetration characteristics of Dimethiconol, relevant to systemic exposure and MoS calculations.
Absorption %
0.1-0.3%
Penetration Level
surface
Penetration Depth
surface only
Molecular Weight
Variable Da
Log P
6.5
Systemic Absorption
minimal
Topical Bioavailability
0.05-0.1%
Safety Margin Factor
minimal
Source: CIR
Additional Ingredient Properties
10 property records from structured ingredient metadata.
acne
{"cas_number": "31692-79-2", "anti_acne_mechanism": "anti_inflammatory", "comedogenicity_rating_0_to_5": "1", "acne_type_efficacy": "inflammatory", "sebum_reduction_pct_clinical": "0-5", "prescription_required_usa": "No", "otc_drug_monograph_category": "No", "max_otc_concentration_pct": "No limit", "japan_quasi_drug_anti_acne": "No", "korea_functional_cosmetic_acne": "No", "eu_cosmetic_restriction…
anti_pollution
{"cas_number": "31692-79-2", "ingredient_class": "anti_pollution", "primary_mechanism": "film_forming_barrier", "pollution_types_targeted": "PM2_5", "IR_A_protection": "no", "visible_light_protection": "no", "digital_screen_protection_claim": "no", "PAH_neutralization": "no", "ozone_protection": "no", "mitochondrial_protection": "no", "Nrf2_activation": "no", "AhR_pathway_modulation": "no", "NF_kB…
baby_pediatric
{"cas_number": "31692-79-2", "ingredient_class": "other", "pediatric_safety_rating": "excellent", "minimum_age_months": "0", "neonatal_safe": "yes", "premature_infant_safe": "yes", "skin_barrier_maturity_consideration": "Film-forming silicone", "transepidermal_absorption_risk_pediatric": "very_low", "dose_per_kg_body_weight_concern": "Non-absorbed polymer", "skin_surface_area_to_weight_ratio_relev…
comedogenicity_detail
{"comedogenicity_rating": "1", "irritancy_rating": "0", "skin_type_suitability": "all,dry,combination,normal", "acne_safe": "yes", "source": "High MW silicone"}
concentration
{"min_concentration_pct": "0.5", "max_concentration_pct": "3.0", "typical_concentration_pct": "1.5", "product_type": "Hair Conditioner", "function_at_concentration": "Conditioning, shine", "source": "CIR Safety Assessment"}
dermal_absorption
{"molecular_weight_da": "Variable", "log_p_value": "6.5", "skin_penetration_level": "surface", "penetration_depth": "surface only", "absorption_pct": "0.1-0.3", "systemic_absorption": "minimal", "penetration_enhancer": "no", "occlusion_effect": "yes", "vehicle_dependent": "no", "skin_barrier_effect": "neutral", "bioavailability_topical_pct": "0.05-0.1", "safety_margin_factor": "minimal", "source":…
ecotoxicity
{"biodegradable": "no", "biodegradation_days": "1200+", "bioaccumulative": "yes", "aquatic_toxicity_level": "low", "coral_reef_safe": "unknown", "marine_toxicity": "very low toxicity", "freshwater_toxicity": "persistent", "soil_toxicity": "sediment accumulation", "endocrine_disruptor": "no", "persistent_organic_pollutant": "yes", "microplastic": "no", "nano_particle": "no", "hawaii_banned": "no", …
emulsion_hlb
{"hlb_required_as_emulsifier": "no", "emulsifier_type": "w_o", "emulsion_stabilization_mechanism": "steric_stabilization", "co_emulsifier_pairs": "cetyl_dimethicone_copolyol", "optimal_oil_phase_pct": "50-85", "optimal_water_phase_pct": "15-50", "droplet_size_range_um": "1-25", "creaming_resistance": "moderate", "coalescence_resistance": "good", "ostwald_ripening_resistance": "good", "freeze_thaw_…
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Binder
Defoamer
Dispersing agent
Flow promoter
Sealant (barrier)
Surface modifier
Viscosity modifier
Waterproofing agent
Wetting agent (non-aqueous)
Regulatory List Membership (1)
EPA Safer Chemical Ingredients List (SCIL)
Expert Verdict
Expert safety assessment and concern-level summary for Dimethiconol.
Regulatory Flags
non-volatile-silicone
high-molecular-weight
film-former
long-wear
hair-conditioning
cosmos-prohibited
epa_safer_alternative
Chemical Function
Binder
Regulatory Lists
inert_ingredient; non_food_use; Pesticides
SCIL (9/2019)
active_ingredient; Pesticides
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Dimethiconol allowed in the EU?
Dimethiconol EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Dimethiconol do in cosmetics?
Dimethiconol functions as: film-forming, hair conditioning, emollient, long-wear binder. It is classified as a cosmetic ingredient in our database. CAS number: 70131-67-8.
Compliance Tools
Check Dimethiconol compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
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Substance Compliance
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MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
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