(E)&(Z)-4,8-Dimethyl-3,7-nonadien-2-one – CAS 817-88-9 Citrus Ketone (Companion to Hesperidin)
Product Identification
| Item | Detail |
|---|---|
| Synonyms | (E)&(Z)-4,8-Dimethyl-3,7-nonadien-2-one; Citrus Ketone; “Citrus (E,Z)-dienone”; (common trade: “Orange/Grapefruit ketone”) |
| CAS RN | 817-88-9 |
| Molecular Formula | C₁₁H₁₈O |
| MW | 166.26 |
| Isomer Note | Commercial material is E/Z blend (ratio process-dependent); both contribute citrus aroma profile |
| Botanical Source | Citrus aurantium/ C. sinensis/ C. grandispeel (cold-pressed oil distillate) |
| Companion SKU | Hesperidin CAS 520-26-3 (flavonoid, same peel, different cut) |
| Related R&D | Nootkatone CAS 4674-50-4 (sesquiterpene ketone, grapefruit, tick/mosquito) |
| HS Code (ref) | 3302 (perfumery / flavor compounds) / 2914 (ketones) |
Description
(E)&(Z)-4,8-Dimethyl-3,7-nonadien-2-one is a medium-volatility aliphatic dienone contributing the “fresh-peel-citrus + subtle green” top note in cold-pressed Citrus oils. It is recovered from the distillation tail of Citrus peel cold-pressed oil — the same upstream as Hesperidin 520-26-3 (which comes from the marc hot-water/ethanol extract, polar cut). One fruit → two SKU streams (flavonoid + volatile ketone), Taima can quote both in one PO for Citrus processors.
Four commercial buckets drive search & procurement:
- Flavor & Fragrance (B2B biggest): “cola-citrus” top note, grapefruit/orange/zest reconstitution, functional beverage “natural citrus aroma”, premium cola formulations (some cola houses use Citrus dienone + vanilla + cinnamon aldehyde as “natural citrus” top). Search cluster: “citrus ketone flavor cola”, “natural orange top note”
- Natural Insect-R&D (high-value, Nootkatone-shadow): Nootkatone (4674-50-4) got EPA registration for Ixodes scapularis(deer tick) + Aedesmosquito; CAS 817-88-9 Citrus dienone is being evaluated as companion/lower-cost citrus-ketone alternative in some IGR/repellency R&D pipelines. B2B R&D procurement: “natural tick repellent citrus ketone 817-88-9”
- Functional Beverage & “Clean Label Aroma” – natural WONF (with other citrus oils), “no artificial flavor” positioning; 817-88-9 is “natural” per EU/US flavor regs if sourced from Citrus peel
- Cosmetic Fragrance – eau de toilette “zesty citrus” top, shampoo/shower gel citrus opening; often blended with limonene, linalool, citral
Applications
Flavor & Fragrance – cola-citrus top note, orange/grapefruit zest reconstitution, functional beverage natural aroma, bakery “fresh peel” note; used at ppm level in final flavor
Natural Insect-R&D – companion molecule to Nootkatone 4674-50-4 for tick/mosquito/IGR evaluation; citrus-ketone class; R&D procurement cluster
Functional Beverage (WONF) – “natural citrus aroma” declaration (CFR / EU flavor reg compliant if Citrus-source); blended with Hesperidin / Citrus extract for “whole-fruit” positioning
Cosmetic Fragrance – eau de toilette, citrus shampoo, shower gel top note; often “Citrus aurantium” declared on INCI alongside limonene/linalool
Companion to Hesperidin 520-26-3 – same Citruspeel upstream, different cut (volatile ketone vs. polar flavonoid); Taima can quote “Citrus peel dual-extract” (Hesperidin + Citrus Ketone) for peel processors
