2-Methylbutane-2-Thiol

INCI: 2-METHYLBUTANE-2-THIOL

CAS Number
1679-09-0
Function
Fragrance ingredient
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status prohibited
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” no specific FDA prohibition

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Thiol group is inherently reactive with potential for skin irritation at higher concentrations; strong unpleasant odor at elevated levels; GHS classification includes H302 (harmful if swallowed) for related thiols.

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Concern Level: Moderate

Regulatory Flags

fragrance-component

Frequently Asked Questions

Is 2-Methylbutane-2-Thiol safe in cosmetics?

Thiol group is inherently reactive with potential for skin irritation at higher concentrations; strong unpleasant odor at elevated levels; GHS classification includes H302 (harmful if swallowed) for related thiols. The EU classifies 2-Methylbutane-2-Thiol as "prohibited". Safety rating: MODERATE.

Is 2-Methylbutane-2-Thiol allowed in the EU?

2-Methylbutane-2-Thiol EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.

What does 2-Methylbutane-2-Thiol do in cosmetics?

2-Methylbutane-2-Thiol functions as: Fragrance ingredient. It is classified as a cosmetic ingredient in our database. CAS number: 1679-09-0.

What is the Margin of Safety for 2-Methylbutane-2-Thiol?

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.

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