Moderate Cosmetic Ingredient NOAEL Data GHS Classified

Methyl Acetoacetate

INCI: METHYL ACETOACETATE

CAS Number
105-45-3
Function
Fragrance ingredient, solvent
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Allowed - no FDA cosmetic prohibition; FEMA GRAS status for flavor use

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
low
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

2 study endpoints found for Methyl Acetoacetate. 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 1000 mg/kg bw/day oral rat oral REACH
NOEL 1000 mg/kg bw/day oral rat oral REACH

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 and respiratory tract. Exposure could cause lowering of consciousness.
Routes of Exposure
The substance can be absorbed into the body by inhalation of its vapour.

Expert Verdict

Low toxicity profile; mild skin and eye irritant at concentrated levels; no significant sensitization concerns at typical use levels. Beta-keto ester with a pleasant, fruity-ethereal odor; serves as a versatile synthetic building block; also used in food flavoring

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Concern Level: High

Regulatory Flags

potential-allergen fragrance-component ifra_fragrance

Frequently Asked Questions

Is Methyl Acetoacetate safe in cosmetics?

Low toxicity profile; mild skin and eye irritant at concentrated levels; no significant sensitization concerns at typical use levels. Beta-keto ester with a pleasant, fruity-ethereal odor; serves as a versatile synthetic building block; also used in food flavoring The EU classifies Methyl Acetoacetate as "permitted". Safety rating: MODERATE. 2 toxicological study endpoint(s) are available in our database.

Is Methyl Acetoacetate allowed in the EU?

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

What does Methyl Acetoacetate do in cosmetics?

Methyl Acetoacetate functions as: Fragrance ingredient, solvent. It is classified as a cosmetic ingredient in our database. CAS number: 105-45-3.

What is the Margin of Safety for Methyl Acetoacetate?

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 Methyl Acetoacetate?

The NOAEL (No Observed Adverse Effect Level) for Methyl Acetoacetate is 1000 mg/kg bw/day based on a oral study via oral route in rat. A total of 2 study endpoints are available. Source: REACH.

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