Poor Cosmetic Ingredient NOAEL Data GHS Classified

Permethrin

INCI: PERMETHRIN

CAS Number
52645-53-1
Function
Insecticide / acaricide
Safety Rating
POOR

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status prohibited
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes FDA-regulated as OTC drug (1% pediculicide) and Rx drug (5% scabicide). Not an approved cosmetic ingredient.

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
moderate
Sensitization
high

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

2 study endpoints found for Permethrin. 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 5 mg/kg bw/day oral rat Chronic COSMOS_DB
LOAEL 25 mg/kg bw/day oral rat Chronic COSMOS_DB

GHS Hazard Classification

Globally Harmonized System classification per ECHA C&L inventory and ILO/WHO International Chemical Safety Cards.

Short-term Exposure Effects
The substance is irritating to the eyes, skin and respiratory tract.
Routes of Exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

Expert Verdict

Neurotoxic pyrethroid with suspected endocrine disruption properties, classified as EPA Group C possible carcinogen, highly toxic to cats and aquatic organisms, and prohibited in cosmetics in the EU.

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Concern Level: High

Regulatory Flags

endocrine_disruptor

Frequently Asked Questions

Is Permethrin safe in cosmetics?

Neurotoxic pyrethroid with suspected endocrine disruption properties, classified as EPA Group C possible carcinogen, highly toxic to cats and aquatic organisms, and prohibited in cosmetics in the EU. The EU classifies Permethrin as "prohibited". Safety rating: POOR. 2 toxicological study endpoint(s) are available in our database.

Is Permethrin allowed in the EU?

Permethrin EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.

What does Permethrin do in cosmetics?

Permethrin functions as: Insecticide / acaricide. It is classified as a cosmetic ingredient in our database. CAS number: 52645-53-1.

What is the Margin of Safety for Permethrin?

not established 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 Permethrin?

The NOAEL (No Observed Adverse Effect Level) for Permethrin is 5 mg/kg bw/day based on a Chronic study via oral route in rat. A total of 2 study endpoints are available. Source: COSMOS_DB.

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