Good Cosmetic Ingredient NOAEL Data

Butyloctanol

INCI: BUTYLOCTANOL

CAS Number
3913-02-8
Function
Humectant, Solvent. Synthetic branched-chain primary alcohol (2-butyl-1-octanol, C12H26O); used in rinse-off and leave-on formulations as a light-texture solvent and moisture-retaining agent; also serves as an intermediate for emollient ester synthesis. Found in hair colourants, shower gels, conditioners and shampoos at low use levels (~0.19% of products).
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Not listed on FDA prohibited or restricted cosmetics ingredients lists. General cosmetic use permitted under FDA authority (FD&C Act). No OTC drug monograph classification.

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
moderate
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

3 study endpoints found for Butyloctanol. 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
NOEL >=1 other oral rat oral REACH
NOEL >=1 other oral - oral REACH
NOAEL 1000 mg/kg bw/day oral rat oral REACH

Expert Verdict

Butyloctanol is a synthetic humectant and solvent with a clean regulatory profile across EU and US markets. Not listed in any EU Cosmetics Regulation annex as restricted or prohibited. EWG scores all concern categories as LOW with limited data availability. One study noted antimicrobial effects against axillary corynebacteria at higher concentrations with no adverse skin findings. Considered safe at cosmetic use levels.

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Concern Level: Low

Regulatory Flags

synthetic humectant solvent hair-products limited-safety-data

Frequently Asked Questions

Is Butyloctanol safe in cosmetics?

Butyloctanol is a synthetic humectant and solvent with a clean regulatory profile across EU and US markets. Not listed in any EU Cosmetics Regulation annex as restricted or prohibited. EWG scores all concern categories as LOW with limited data availability. One study noted antimicrobial effects against axillary corynebacteria at higher concentrations with no adverse skin findings. Considered safe at cosmetic use levels. The EU classifies Butyloctanol as "permitted". Safety rating: GOOD. 3 toxicological study endpoint(s) are available in our database.

Is Butyloctanol allowed in the EU?

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

What does Butyloctanol do in cosmetics?

Butyloctanol functions as: Humectant, Solvent. Synthetic branched-chain primary alcohol (2-butyl-1-octanol, C12H26O); used in rinse-off and leave-on formulations as a light-texture solvent and moisture-retaining agent; also serves as an intermediate for emollient ester synthesis. Found in hair colourants, shower gels, conditioners and shampoos at low use levels (~0.19% of products).. It is classified as a cosmetic ingredient in our database. CAS number: 3913-02-8.

What is the Margin of Safety for Butyloctanol?

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 Butyloctanol?

The NOAEL (No Observed Adverse Effect Level) for Butyloctanol is >=1 other based on a oral study via oral route in rat. A total of 3 study endpoints are available. Source: REACH.

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