The opening is sharp and aldehydic, fatty and citrus-bright at once, with a lemon-lime clarity and a waxy, slightly greasy edge that reads as both fresh and richly gourmand depending on what surrounds it. There is a faint green quality underneath, and at low concentrations a honey-like sweetness emerges that ties it naturally to floral and citrus compositions. Odour life on a smelling strip is only 3 hours, making it a true top note material, but its diffusive power at a relative odour impact of 1000 means even trace amounts register immediately and emphatically.

Aldehyde C-8 works as a top note modifier, citrus brightener, and aldehydic lift material used at extremely low concentrations.

Recommended concentration: 0.01% minimum, 0.1% average, up to 0.8% maximum in a finished compound. These numbers are not approximate, work within them carefully.

Particularly effective in:

Classic aldehydic fine fragrance structures in the tradition of Chanel No. 5 and its descendants
Eau de cologne and neroli-forward compositions needing fatty citrus lift
Bergamot, orange blossom, and jasmine accords at trace levels
Fresh citrus top note enhancement
Honey and apricot accords where a fatty, fruity facet is needed
Shampoo, hair care, and personal care products (rated excellent for these applications)

Blends well with:

Aldehydes: nonanal (C-9), phenyl acetaldehyde dimethyl acetal for layered aldehydic effects
Citrus: bergamot, lemon, lime, petitgrain, neroli
Florals: rose, jasmine, orange blossom
Honey and floral-fatty materials: phenethyl alcohol
Green materials at low levels for added freshness

Suitable for candles and home fragrance at very low levels (rated reasonable); avoid in cold wave or chlorine-heavy applications.

Material Type: Aroma chemical
Function: Aldehydic top note modifier / citrus-fatty brightener
Extraction Method: Synthetic
CAS Number: 124-13-0
FEMA Number: 2797
Synonyms: Octanal, Capryl Aldehyde, Caprylic Aldehyde, Octyl Aldehyde, Aldehyde C-8
Origin: Synthetic
Odour Profile: Sharp, fatty, citrus, lemon-lime, waxy, green, faintly honey-like
Appearance: Colourless mobile liquid
Specific Gravity: 0.818
Refractive Index: 1.417
Flash Point: 51.67°C
Boiling Point: 171°C
Solubility: Soluble in alcohol and oils
Key Components: Octanal (n-octanal)
Regulatory Status: SDS and/or IFRA documentation can be supplied upon request where available.

For external use only. Do not ingest
Extremely high odour impact (1000). Handle with care; even small spills will saturate a working space
Work in a well-ventilated area; avoid breathing vapours
Flammable liquid; flash point 51.67°C; keep away from heat, sparks, and open flames
Avoid contact with eyes and skin; irritant at full concentration
Pre-dilute to 10% in DPG or alcohol before use for more manageable weighing and blending
Store tightly sealed in a cool, dark place; oxidises readily on exposure to air
Shelf life: 1-2 years; discard if the aroma has turned harsh or rancid