Allyl Cyclohexyl Propionate (ACHP)

Allyl Cyclohexyl Propionate (CAS Number: 2705-87-5) – Complete Product Overview

• 🏭 Manufacturer — Symrise

• 🔎 Chemical name — Allyl Cyclohexanepropionate

• 📂 CAS N° — 2705-87-5

• ⚖️ MW — 196.29 g/mol

• 📝 Odor type — Fruity, pineapple-like

• 📈 Odor Strength — Medium to strong

• 👃🏼 Odor Profile — Used in fine fragrances, personal care products (shampoos, lotions), and household items (air fresheners, detergents)

• ⚗️ Uses —Fine Fragrance, Personal Care Product, Household Products

Olfactory Profile

Allyl Cyclohexyl Propionate is best known for its sweet, fruity pineapple-like aroma with woody and green undertones. The compound has a smoother and sweeter scent compared to similar esters, such as Allyl Caproate. Its lasting power is notable, as it can remain detectable for over a week on smelling strips (Arctander, 1969). The fragrance has also been recognized for its crucial role in formulating tropical and red fruit compositions (Kraft, 2012).

Odor Characteristics:

• Fruity

• Pineapple-like

• Green

• Slightly woody

Applications in Perfumery and Product Categories

Allyl Cyclohexyl Propionate is extensively used in fragrance formulations due to its refreshing, fruity quality and excellent stability. Its applications span several product categories:

• Fine Fragrances: Frequently used in top and middle notes, it provides a fresh burst of pineapple and green fruit in fruity, floral, and tropical fragrance compositions.

• Personal Care Products: Ideal for shampoos, body washes, and lotions, where it imparts a long-lasting fruity freshness.

• Household Products: Commonly found in air fresheners, detergents, and cleaning products, where its tropical scent helps mask base odors.

Fragrance Families:

• Fruity: Its pineapple-like scent works well in strawberry, raspberry, and other red fruit accords (Sell, 2006).

• Tropical: Adds a vibrant, exotic character to formulations.

• Floral: Pairs effectively with white florals like jasmine and orange blossom, adding a fruity freshness.

Usage in Fragrance Formulation

Concentration Levels:

• Fine Fragrance: Typically used at 0.5% to 3% to impart a fruity, tropical note.

• Personal Care Products: Employed at concentrations of 0.5% to 1.5% for a refreshing, long-lasting aroma.

• Household Products: Used at concentrations of up to 3% for enhanced longevity and a stronger scent.

Blending Suggestions:

• With Florals: Complements floral notes like lily of the valley and jasmine, enhancing their sweetness with a fruity top note.

• With Green Notes: Pairs well with green elements such as galbanum and violet leaf, emphasizing its fresh, green facets.

• With Woods: Blends with woody notes like sandalwood and cedarwood, adding a subtle, sweet depth to the fragrance.

Scientific Details

Allyl Cyclohexyl Propionate is a stable ester with excellent performance in both liquid and powder formulations. According to Charles Sell and Philip Kraft, its longevity is a standout feature, allowing it to maintain a strong scent on the skin and in products for extended periods (Kraft, 2012; Sell, 2006). Its ability to persist in water-based productsenhances its versatility across personal care and household applications.

From a chemical perspective, its structure—a cyclohexyl group attached to a propionate moiety—gives it both woody and fruity qualities, making it a flexible and enduring component in various fragrance formulations (Arctander, 1969).

Regulatory Information and Safety

IFRA Guidelines:

Allyl Cyclohexyl Propionate is safe for use in perfumery and personal care products when used within IFRA-recommended concentration limits to avoid sensitization.

• Maximum Usage Levels:

  • Fine fragrances and personal care products: up to 3%.

  • Functional products (air fresheners, detergents): up to 3%.

Safety Considerations:

As with all fragrance ingredients, it is recommended to conduct thorough testing, especially for sensitive skin products, before wide use.

Environmental Impact

• Biodegradability: Allyl Cyclohexyl Propionate is considered biodegradable, reducing its environmental footprint. Proper disposal practices should still be observed to avoid contamination of water sources.

• Aquatic Toxicity: Limited data is available on aquatic toxicity, but care should be taken to prevent contamination in aquatic environments.

Conclusion

Allyl Cyclohexyl Propionate is a highly versatile ester, prized for its long-lasting, fruity pineapple-like aroma and ability to blend seamlessly with a variety of notes. Its persistence in fragrance compositions, combined with its tropical and red fruit applications, makes it a valuable asset for perfumers working on fine fragrances, personal care products, and household items.

References

• Arctander, S. (1969). Perfume and Flavor Chemicals (Aroma Chemicals). Allured Publishing Corporation.

• Kraft, P. (2012). From Headspace to Scent-Space: What Are New Odorants? Chemical Communications.

• Sell, C. S. (2006). The Chemistry of Fragrances: From Perfumer to Consumer. Royal Society of Chemistry.

• International Fragrance Association (IFRA). (2021). IFRA Standards. Retrieved from https://ifrafragrance.org/

• National Center for Biotechnology Information (2023). PubChem Compound Summary for CID 134045, Allyl cyclohexanepropionate. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/Allyl-cyclohexanepropionate