Moderate Cosmetic Ingredient NOAEL Data GHS Classified

Prenol

INCI: PRENOL

CAS Number
556-82-1
Function
Fragrance ingredient; 3-methyl-2-buten-1-ol used as aroma chemical
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes No specific CIR review; IFRA-regulated as a fragrance ingredient

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.

Toxicological Studies

1 study endpoint found for Prenol. 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 82.1 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.

Signal Word
WARNING
Pictograms
flam;flame; excl mark;warn
Hazard Statements
Flammable liquid and vapour Harmful if swallowed Causes skin irritation Causes serious eye irritation Harmful to aquatic life
Short-term Exposure Effects
The substance is severely irritating to the skin and eyes.
Routes of Exposure
The substance can be absorbed into the body by ingestion and by inhalation of its vapour.

Expert Verdict

IFRA compliance required for fragrance use; unsaturated alcohol may undergo oxidation forming sensitizing species.

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Concern Level: Moderate

Regulatory Flags

potential-allergen fragrance-component ifra_fragrance fda_food_additive

Frequently Asked Questions

Is Prenol safe in cosmetics?

IFRA compliance required for fragrance use; unsaturated alcohol may undergo oxidation forming sensitizing species. The EU classifies Prenol as "permitted". Safety rating: MODERATE. 1 toxicological study endpoint(s) are available in our database.

Is Prenol allowed in the EU?

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

What does Prenol do in cosmetics?

Prenol functions as: Fragrance ingredient; 3-methyl-2-buten-1-ol used as aroma chemical. It is classified as a cosmetic ingredient in our database. CAS number: 556-82-1.

What is the Margin of Safety for Prenol?

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 Prenol?

The NOAEL (No Observed Adverse Effect Level) for Prenol is 82.1 mg/kg bw/day based on a oral study via oral route in rat. Source: REACH.

Is Prenol classified as hazardous under GHS?

Prenol carries a GHS signal word of "WARNING". Hazard statements: Flammable liquid and vapour Harmful if swallowed Causes skin irritation Causes serious eye irritation Harmful to aquatic life. This classification is based on the ILO/WHO International Chemical Safety Card and ECHA C&L inventory data. Note: GHS classification applies to the pure substance โ€” at cosmetic use concentrations, hazard thresholds may not be met.

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