Good Cosmetic Ingredient NOAEL Data

1,2-Hexanediol

INCI: 1,2-HEXANEDIOL

CAS Number
6920-22-5
Function
solvent, preservative booster, antimicrobial
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes No restrictions; used in clean-beauty, natural, and infant formulations

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

2 study endpoints found for 1,2-Hexanediol. 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 500 mg/kg bw/day oral rat oral REACH
NOAEL 700 mg/kg bw/day dermal rat dermal REACH

Expert Verdict

Versatile diol with moderate antimicrobial activity used as solvent, texture modifier, and preservative booster in cosmetic formulations. Works best as part of a combined hurdle approach rather than as a sole preservative, with recommended use concentrations of 0.5โ€“3.0% to minimize irritation potential.

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Concern Level: Low

Regulatory Flags

preservative-booster solvent multifunctional infant-safe paraben-free hurdle-technology epa_safer_alternative ifra_fragrance

Frequently Asked Questions

Is 1,2-Hexanediol safe in cosmetics?

Versatile diol with moderate antimicrobial activity used as solvent, texture modifier, and preservative booster in cosmetic formulations. Works best as part of a combined hurdle approach rather than as a sole preservative, with recommended use concentrations of 0.5โ€“3.0% to minimize irritation potential. The EU classifies 1,2-Hexanediol as "permitted". Safety rating: GOOD. 2 toxicological study endpoint(s) are available in our database.

Is 1,2-Hexanediol allowed in the EU?

1,2-Hexanediol EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does 1,2-Hexanediol do in cosmetics?

1,2-Hexanediol functions as: solvent, preservative booster, antimicrobial. It is classified as a cosmetic ingredient in our database. CAS number: 6920-22-5.

What is the Margin of Safety for 1,2-Hexanediol?

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 1,2-Hexanediol?

The NOAEL (No Observed Adverse Effect Level) for 1,2-Hexanediol is 500 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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