Concord-direction: methyl anthranilate (CAS 134-20-3) dominant — sweet, grape-skin, bubble-gum, the kind of 'grape' Americans recognise from candy.
Muscat-direction: linalool and α-terpineol heavy — rosy-floral, terpenic, the kind of grape that smells of orange blossom and rose.
Sauvignon Blanc-direction: 4-methoxy-2-methyl-2-butanethiol (CAS 86570-37-0) at parts-per-billion [B] — catty, leafy, faintly sulphurous, the kind of grape that smells of black-currant bud and grapefruit. Same fruit, three completely different aromatic registers.
Around the chosen cultivar signature, perfumers build β-damascenone for floral-fruity depth (the compound responsible for the cooked / aged note of fortified wines and pressed grapes), small ester palettes, and trace ionones for violet-rounding.
Grape seed oil
Grape seed oil (CAS 8024-22-4) — the cosmetic carrier oil pressed from grape pips — is nearly odourless and is not a fragrance ingredient. It is used in skincare for its high linoleic acid and vitamin E content. The fragrance accord and the cosmetic oil are different products from different parts of the same plant.
Sources & Notes
[A] PubChem CID 8635 — methyl anthranilate, CAS 134-20-3. The Concord-grape signature. Also occurs naturally in mandarin and orange-blossom absolute. pubchem.ncbi.nlm.nih.gov/compound/8635.
[B] PubChem CID 11669880 — 4-methoxy-2-methyl-2-butanethiol (the 'cat ketone' / Sauvignon Blanc thiol), CAS 86570-37-0. Same compound defines black currant buds. pubchem.ncbi.nlm.nih.gov/compound/11669880.