Fragrance Esters and Lactones | Aure Chemical
A fragrance esters supplier may offer materials with very different roles in a composition. Acetates, salicylates, allyl esters and lactones belong to a broad ester family, but their structures do not imply a single odor profile or common performance in a product base.
This guide organizes Aure Chemical's linked materials into practical comparison groups. It also identifies two related cases that need more precise descriptions: 2-methylbutyric acid is a precursor, while Fructone combines ester and cyclic ketal functionality.
Compare materials within a useful structural group
Start with the accord and intended application, then select a small group for evaluation. Keep the ortho and para tert-butylcyclohexyl acetates distinct. Likewise, compare individual salicylates on their own merits rather than treating the common salicylate group as evidence of equivalent odor or persistence.
| Ingredient | CAS number | Selection focus |
|---|---|---|
| O-tert-Butylcyclohexyl Acetate | 88-41-5 | Ortho tert-butylcyclohexyl acetate; confirm the commercial isomer profile. |
| 4-tert-Butylcyclohexyl Acetate | 32210-23-4 | Para tert-butylcyclohexyl acetate; evaluate separately from the ortho material. |
| Styralyl Acetate | 93-92-5 | A separate acetate candidate for the formulation brief. |
| Verdyl Acetate | 5413-60-5 | Confirm the structure and commercial mixture before comparing grades. |
| Herbyl Propionate | 17511-60-3 | Compare the offered grade with the approved reference. |
| Amyl Salicylate | 2050-08-0 | Amyl salicylate; define the exact identity and grade. |
| Hexyl Salicylate | 6259-76-3 | Hexyl salicylate; test its individual contribution to the accord. |
| Benzyl Salicylate | 118-58-1 | Benzyl salicylate; assess the material in the target composition. |
| Cyclohexyl Salicylate | 25485-88-5 | Cyclohexyl salicylate; evaluate separately from other salicylates. |
Evaluate allyl esters and branched acid esters separately
Allyl Cyclohexylpropionate belongs in this ester comparison because its structure contains an ester linkage. Sigma-Aldrich identifies the same CAS number as allyl cyclohexanepropionate and describes a sweet, pineapple-oriented odor. That profile can guide a fruity sample brief without establishing the performance of Aure Chemical's offered grade.
| Ingredient | CAS number | Selection focus |
|---|---|---|
| Allyl Cyclohexylpropionate | 2705-87-5 | Allyl ester; a candidate for a pineapple-oriented comparison. |
| Allyl Heptanoate | 142-19-8 | Allyl heptanoate; compare as an individual allyl ester. |
| Allyl Caproate | 123-68-2 | Allyl caproate; also specify the chemical identity when using the trade name. |
| Allyl Phenoxyacetate | 7493-74-5 | Allyl phenoxyacetate; distinguish from other allyl esters. |
| Allyl (3-methylbutoxy)acetate | 67634-00-8 | Contains both ether and ester functionality; assess the complete structure. |
| Ethyl 2-Methylbutyrate | 7452-79-1 | Ethyl ester of 2-methylbutyric acid; evaluate the offered grade. |
| Isopropyl 2-Methylbutyrate | 66576-71-4 | Isopropyl ester of 2-methylbutyric acid; compare separately. |
Keep lactones and multifunctional ingredients identifiable
delta-Decalactone is a cyclic ester. Identify it by CAS 705-86-2 when requesting a sample; a general description such as decalactone does not distinguish all positional or stereochemical variants.
Fructone is identified by IFF as ethyl (2-methyl-1,3-dioxolan-2-yl)acetate. Its structure contains an ester and a ketal ring. IFF describes a fruity profile with apple and tropical-fruit aspects, making it a relevant candidate for a fruity comparison, while its dual functionality should remain clear in technical records.
Dihydrocitronellyl acetate, CAS 20780-49-8, is identified in the NIST Chemistry WebBook as 3,7-dimethyloctyl acetate. Keep this saturated acetate distinct from citronellyl acetate in the sample brief and purchasing record. Match the name, CAS number and supplier specification before ordering.
Separate the acid precursor from direct ester selection
2-Methylbutyric Acid is a carboxylic acid, not an ester. It belongs in a procurement discussion when a process team is sourcing a precursor to related esters. The requirement for such a project differs from a formulator selecting an ester for direct use in a fragrance.
Identify that role in the enquiry. For precursor sourcing, provide the downstream process requirements and relevant impurity limits. For direct fragrance use, provide the intended base and sensory evaluation criteria. Keeping those briefs separate avoids an unsuitable sample comparison.
Test the actual base and agree the receiving specification
Use consistent sample preparation and the intended product base to compare odor, appearance and changes during storage. Where the formulation is aqueous or uses demanding pH conditions, include those conditions in the evaluation. Do not infer compatibility from membership of the ester family.
Agree identity and assay methods before comparing certificates of analysis. Depending on the material and project, water, acid value, residual starting materials or an isomer profile may be useful controls. Specify methods and acceptance criteria rather than asking for an undefined high-purity grade.
Send a focused enquiry
Provide Aure Chemical with the exact material and CAS number, intended use, required quantity, destination and documentation needs. Ask for current product-specific certification documents where relevant. Review IFRA conformity guidance as part of the finished-composition assessment.
Contact Aure Chemical for the linked esters, lactone or related precursor. For the wider ingredient selection framework, see Fragrance Ingredients: Chemical Families and Procurement; for woody and floral alcohol candidates, see sandalwood alcohols and specialty aroma ingredients.