Dimethyl Octynediol

INCI: DIMETHYL OCTYNEDIOL

CAS Number
1321-87-5 (also reported as 78-66-0 for single isomer)
Function
Wetting agent, emulsifier, solvent (Surfynol-type acetylenic diol)
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” no specific CFR restriction

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Skin and eye irritant with H315 and H319 classifications; harmful if swallowed (H302); may cause organ damage with prolonged exposure (H373); use in cosmetics should be kept low, typically below 1%.

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Concern Level: Moderate

Frequently Asked Questions

Is Dimethyl Octynediol safe in cosmetics?

Skin and eye irritant with H315 and H319 classifications; harmful if swallowed (H302); may cause organ damage with prolonged exposure (H373); use in cosmetics should be kept low, typically below 1%. The EU classifies Dimethyl Octynediol as "permitted". Safety rating: MODERATE.

Is Dimethyl Octynediol allowed in the EU?

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

What does Dimethyl Octynediol do in cosmetics?

Dimethyl Octynediol functions as: Wetting agent, emulsifier, solvent (Surfynol-type acetylenic diol). It is classified as a cosmetic ingredient in our database. CAS number: 1321-87-5 (also reported as 78-66-0 for single isomer).

What is the Margin of Safety for Dimethyl Octynediol?

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.

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