Material guide · 14
Material guide: benzyl acetate — the flesh of the jasmine, and the shortest-lived material in this series
· 16 min read
It keeps appearing on the main-constituent lists of jasmine absolutes — sweet, fruity, the bite of a white petal. At 4 hours of substantivity it is the shortest-lived material in this series so far: not a flaw but the definition of a top note. And its family (benzyl acetate 4 h, benzyl alcohol 35 h, benzyl benzoate 322 h, benzyl salicylate 384 h) — one benzyl head, different acids — forms an evaporation curve all by itself. 100 suppliers.
Hedione is the jasmine's transparent halo; the indole of the first article is its animal depth. This guide adds the third piece: the jasmine's flesh.
What matters
- Benzyl acetate is one of jasmine's main constituents: sweet, fruity, the bite of a white petal. Jasmine in three pieces: flesh (this), transparent halo (Hedione), animal depth (indole).
- Four hours of substantivity, the shortest-lived material in this series so far. That is simply what a top note is. Bright, fast, gone.
- Its family is a ready-made evaporation lesson: one benzyl head, 4 hours with acetic acid, 322 with benzoic, 384 with salicylic. Swap the acid and the lifespan changes completely.
The record
| CAS | 140-11-4 |
| Formula | C₉H₁₀O₂ (an ester — plainly: an alcohol and an acid "holding hands"; the biggest family of fruity molecules) |
| MW | 150.18 |
| Odour | sweet, floral, fruity, jasmine, fresh |
| Strength | medium |
| Substantivity | 4 h (neat, on a strip) |
| Specific gravity | 1.049–1.059 (25 °C) — heavier than water |
| Shelf life | 24 months or longer (cool, dark, sealed) |
| Registers | GRAS, JECFA, CoE, FEMA GRAS, IFRA |
Plain reading: CAS is the material's ID number. Set 4 hours against ethylene brassylate's 208 and you have two ends of one scale, the textbook contrast of top note and base.
How much of the jasmine is it?
Two studies place it on jasmine's main-constituent lists:
In 2009 Braun and colleagues, in Natural Product Communications, compared four Indian jasmine absolutes (J. flexile, J. sambac, J. officinale subsp. grandiflorum, J. auriculatum):
One hundred and twenty-one compounds were characterized in J. flexile flower absolute, with methyl linolate, benzyl salicylate, benzyl benzoate, (2E,6E)-farnesol, and benzyl acetate as the main constituents.
In 2012 Kunhachan and colleagues analysed the flowers of J. sambac "Grand Duke of Tuscany":
The main volatile constituents were benzyl acetate, indole, (E,E)-α-farnesene, (Z)-3-hexenyl benzoate, benzyl alcohol, linalool, and methyl anthranilate.
Two things are worth noticing across both lists. Benzyl acetate makes the main-constituent cut in both. And the benzyl clan holds nearly half the seats across the two main-constituent lists (benzyl acetate, benzyl benzoate, benzyl salicylate, benzyl alcohol). The lists only tell us they are all present; neither abstract gives each constituent's actual share of the smell. Kunhachan's list also carries indole and linalool: the first article's "jasmine carries indole" and linalool's omnipresence, both back again here.
The shortest-lived material in the series
Four hours. Against the materials covered so far: citral 12 h, linalool 12 h, PEA 32 h, ethylene brassylate 208 h, patchouli at top of scale.
This is not a defect. The evaporation curve article made the point: the curve is continuous, and every stretch needs something. Benzyl acetate's job is the very front, the sweet white flower of the first second, brilliant and punctually gone, handing the stage to the heart. Anyone trying to make it stay will be disappointed; anyone who understands it stations a successor beside it (Hedione is the natural relay).
The family: a ready-made evaporation curve
The benzyl clan is one benzyl head with different acids attached:
| Item | Substantivity | Role |
|---|---|---|
| benzyl acetate (100 suppliers) | 4 h | top: the sweet white flower's flesh |
| benzyl alcohol (125) | 35 h | middle: soft florality with a phenolic edge (the solvents article noted it genuinely smells) |
| benzyl benzoate (84) | 322 h | base: balsamic (the solvents article's warning: not an odourless solvent) |
| benzyl salicylate (58) | 384 h | base: the white flower's "skin-like" afterglow |
One head, four acids, a near-hundredfold spread in persistence. For an intuitive grasp of "what happens when you swap the acid", put all four on strips and watch them exit in order across one day. The first time I ran this myself, benzyl salicylate was the only one still going the next morning, and that stuck with me better than any chart. Four small bottles, one evaporation class.
Jasmine in three pieces (our own starter smelling experiment — not a literature formula)
- Flesh: benzyl acetate, 5 parts
- Transparent halo: Hedione, 10 parts
- Animal depth: indole as a 10% dilution, 0.5 part (neat indole smells faecal, the first article's classic lesson; dilute first, always)
Smell at 10% overall. It will be far from a finished jasmine, but you will understand in one sitting what each piece is for.
Smelling it
- Evaluate at 10%. Neat it is flatly sweet; diluted, the fruit gains dimension.
- Pair it with fruit accords: it is a regular in banana and apple notes too. "Jasmine and banana share a molecule" is the ester family's best welcome gift.
- Storage for a sprinter: it is an ester rather than an oxidation casualty, so seal and shade as usual. Its real enemy is your expectation: four hours means four hours.
Regulatory
Listed on GRAS, JECFA, CoE, FEMA GRAS, IFRA. As always: registers carry no limit values. Benzyl acetate is regulatorily uncomplicated; for skin formulae consult the current IFRA Standards and the supplier's specification.
Buying it
- 100 suppliers and cheap. Top notes are dosed generously, so the bigger bottle is fine.
- Collect the four benzyl brothers in one order and the evaporation class above comes with the shipment.
- Add the jasmine trio: with Hedione and an indole dilution, the white-floral skeleton arrives in one go.
→ Benzyl acetate in the database: full properties, supplier list, suggested pairings. → Benzyl alcohol | Benzyl benzoate | Benzyl salicylate | Indole | Search by odour: try "jasmine sweet" for its neighbours.
References
N. A. Braun, B. Kohlenberg, S. Sim, M. Meier & F.-J. Hammerschmidt, Jasminum flexile flower absolute from India – a detailed comparison with three other jasmine absolutes, Natural Product Communications, 4(9), 1239–1250 (2009). PMID 19831037
P. Kunhachan et al., Chemical composition, toxicity and vasodilatation effect of the flowers extract of Jasminum sambac (L.) Ait. "G. Duke of Tuscany", Evidence-Based Complementary and Alternative Medicine, 2012, 471312 (2012). PMID 22536286