Good Cosmetic Ingredient NOAEL Data

PEG-40 Stearate

INCI: PEG-40 STEARATE

CAS Number
9004-99-3
Function
Emulsifying, Surfactant, Humectant
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes CIR concluded safe; no mutagenicity or carcinogenicity; minimal skin/eye irritation; 1,4-dioxane impurity possible

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
low
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

4 study endpoints found for PEG-40 Stearate. NOAEL (No Observed Adverse Effect Level) values are used to calculate the Margin of Safety per SCCS methodology.

Endpoint Value Route Species Study Type Source
NOAEL 5000 mg/kg bw/day oral rat Chronic COSMOS_DB
NOAEL 2500 mg/kg bw/day oral hamster Chronic COSMOS_DB
NOAEL 2500 mg/kg bw/day oral hamster Chronic COSMOS_DB
NOAEL 2500 mg/kg bw/day oral rat Chronic COSMOS_DB

Expert Verdict

Well-studied and safe emulsifier; no reproductive or developmental toxicity found; source (plant vs animal) matters for EU compliance

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Concern Level: Low

Regulatory Flags

peg-compound ethoxylated stearate 1,4-dioxane-risk eu_children_restricted epa_safer_alternative ifra_fragrance fda_food_additive

Frequently Asked Questions

Is PEG-40 Stearate safe in cosmetics?

Well-studied and safe emulsifier; no reproductive or developmental toxicity found; source (plant vs animal) matters for EU compliance The EU classifies PEG-40 Stearate as "permitted". Safety rating: GOOD. 4 toxicological study endpoint(s) are available in our database.

Is PEG-40 Stearate allowed in the EU?

PEG-40 Stearate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does PEG-40 Stearate do in cosmetics?

PEG-40 Stearate functions as: Emulsifying, Surfactant, Humectant. It is classified as a cosmetic ingredient in our database. CAS number: 9004-99-3.

What is the Margin of Safety for PEG-40 Stearate?

adequate The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

What is the NOAEL for PEG-40 Stearate?

The NOAEL (No Observed Adverse Effect Level) for PEG-40 Stearate is 5000 mg/kg bw/day based on a Chronic study via oral route in rat. A total of 4 study endpoints are available. Source: COSMOS_DB.

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