indocolore (Firmenich)

Indocolore (Firmenich), chemically identified as α-Acetoxystyrene, is an aromatic organic compound with molecular formula C₁₀H₁₀O₂. It appears as a clear substance used primarily in fragrance applications. The compound possesses a distinct animalic and floral odor profile with phenolic and fecal undertones, contributing to powerful floral notes in perfumery. Synonyms include 1-phenylvinyl acetate, alpha methylene benzyl acetate, and a-methylenebenzyl acetate. This compound is classified under fragrance agents and is referenced in controlled-vocabulary chemical databases such as PubChem (CID 75153). It is synthesized as an acetate derivative of phenylethenyl structures and is typically leveraged to add nuanced indolic floral effects without color interference in formulations.

Indocolore (Firmenich) does not naturally occur in biological systems but serves as an industrial aroma chemical in perfumery. Its application capitalizes on its distinctive animalic and floral odor attributes, which are intense even at low concentrations (recommended at or below 1.00%) and show remarkable substantivity lasting up to 168 hours in solvents like dipropylene glycol. The compound is utilized for its floral nuances with less naphtalenic character compared to related indolic compounds. Its use and regulation fall under fragrance standards such as IFRA (Global), which governs safe usage levels in consumer products. It is not approved for flavoring purposes. Validated stability from trace amounts to 0.5% in products ranging from detergents to fine fragrances supports its versatility in formulation.

Indocolore (Firmenich) exhibits physicochemical properties crucial for its function in formulations. Its molecular weight is approximately 162.19 g/mol, and it has a moderate estimated log P value of 2.13, indicating balanced lipophilicity favoring solubility in both alcohol and water (estimated 498.1 mg/L at 25 °C). The compound’s vapor pressure is low (0.025 mmHg at 25 °C), signifying limited volatility which contributes to its lasting scent profile. Its flash point is 83 °C (183 °F) by tag closed cup method, denoting moderate flammability typical of aromatic acetate esters. Stability assessments confirm that Indocolore remains consistent under various application conditions, including shampoos and softeners, at trace to low concentration levels. These characteristics render it suitable for durable fragrance effects in diverse personal care products.

(IUPAC):	Atomic Weights of the Elements 2011 (pdf)
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(IUPAC):	Periodic Table of the Elements
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Safety information

Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Pictogram
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
Not determined
Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined

Safety in use information

Category:
fragrance agents
RIFM Fragrance Material Safety Assessment: Search
IFRA Code of Practice Notification of the 49th Amendment to the IFRA Code of Practice
Recommendation for indocolore (Firmenich) flavor usage levels up to:
	not for flavor use.

Safety references

EPI System: View

AIDS Citations:Search

Cancer Citations:Search

Toxicology Citations:Search

EPA Substance Registry Services (TSCA):2206-94-2

EPA ACToR:Toxicology Data

EPA Substance Registry Services (SRS):Registry

Laboratory Chemical Safety Summary :75153

National Institute of Allergy and Infectious Diseases:Data

1-phenylethenyl acetate

Chemidplus:0002206942