What Is Isojasmone B 11?
Isojasmone B 11 is a floral aroma chemical created by Givaudan, one of the largest fragrance houses in the world. Although Givaudan invented and named it, other suppliers may offer equivalent grades under different trade names.
The molecule is produced through standard organic synthesis that links renewable plant-derived building blocks into the final C11 compound. The process is considered simple in industry terms which helps keep output reliable and consistent.
At room temperature the material is a clear liquid that starts out colorless and can age to a faint straw tint over time. It pours easily and does not crystallize, so measuring and blending are straightforward.
Perfumers reach for Isojasmone B 11 whenever they need extra lift and realism in jasmine or mixed floral accords. It also finds a niche in chypre styles where it teams with mossy or leathery notes for added radiance.
This is a mid-volume specialty ingredient rather than a bulk workhorse. You will see it in fine fragrance, personal care bases and some air care formulas but seldom in industrial products.
Stored well, the material keeps its quality for roughly two to three years before the scent begins to fade or shift. As synthetics go it sits in the mid-price bracket: not bargain-level cheap but nowhere near the cost of the most exotic natural absolutes.
Isojasmone B 11’s Scent Description
The ingredient lives squarely in the floral family. Off a blotter the first impression is a bright yet soft jasmine tone that feels freshly picked rather than overly heady.
Within seconds a gentle green aspect peeks through, adding an airy leaf-like quality. As it settles a warm diffusive sweetness appears, reminiscent of sun-warmed petals with a hint of aromatic herb.
Perfumers break a fragrance into top, middle and base notes. The top is what you smell in the first minutes, the middle forms the heart once the alcohol flashes off and the base lingers longest on skin or fabric.
Isojasmone B 11 sits in the upper-middle zone. It joins the opening bouquet quickly yet stays present for several hours, bridging the sparkle of top notes with the deeper base.
Projection is moderate: it radiates a clean floral halo without overwhelming nearby noses. Longevity on skin and paper is respectable, lasting three days on a blotter before tapering to a soft trail.
How & Where To Use Isojasmone B 11
Perfumers reach for Isojasmone B 11 when they need a natural yet diffusive jasmine lift in the heart of a composition. It excels at filling the space between bright hedione-type top notes and heavier indolic absolutes, giving the bouquet a clean push that feels modern and effortless. In chypre styles its warm floral facet balances the bitterness of quinolines or oakmoss while adding body to the heart.
Typical use sits between 0.1% and 1% of the total formula. At trace levels it simply freshens a bouquet, nudging other petals forward without announcing itself. Near 1% the material becomes more recognisable, offering a rounded jasmine with faint tea and hay undertones. Going above 2% can work in niche compositions that aim for a bold single-flower statement, yet beyond that point the note may turn slightly oily and can crowd out delicate modifiers.
The ingredient shows strong performance in alcoholic fine fragrance, fabric conditioners and shampoos thanks to its three-day blotter life and high bloom in aqueous systems. It holds up well in neutral and mildly acidic bases, though its floral clarity dulls in very alkaline soaps or bleach where pH sits above 10. In candles and reed diffusers it behaves predictably, but expect a softer projection than in alcohol.
Over-use poses two main risks. First, the scent can flatten into a generic waxy floral that no longer reads as jasmine. Second, its warm facet may clash with fruity lactones, creating an unintended overripe nuance. Always build an accord in increments, smelling the blend on a blotter after each addition rather than relying on the raw dilution.
Prep work is straightforward. Most labs keep a 10% ethanol or DPG dilution ready for weighing, which improves dosing accuracy and reduces the chance of spills from the viscous neat material. Gentle warming of the stock bottle in a water bath can help when piping small amounts, but avoid temperatures above 40 °C to preserve freshness. Label the dilution with both date and concentration so future adjustments are clear.
Safely Using Isojasmone B 11
Dilution is key when evaluating any aroma chemical. Always prepare a 10% or weaker solution before smelling. Avoid direct sniffing from the bottle and instead waft the scent from a blotter held a few inches from your nose.
Work in a well-ventilated area such as a fume hood or near an open window to disperse vapors. Gloves and safety glasses provide a simple barrier against accidental splashes or skin contact.
While Isojasmone B 11 is not classified as highly toxic, some users may experience skin irritation or sensitisation after repeated exposure. If you are pregnant or breastfeeding consult a medical professional before handling any fragrance materials. Short encounters with low concentrations are considered low risk, yet long sessions with undiluted material can cause headaches or nausea.
Keep work surfaces clean and wipe spills promptly with an absorbent towel followed by alcohol. Store the bottle tightly closed in a cool dark cabinet away from oxidising agents. Dispose of excess stock or rinse solutions through your local hazardous waste program rather than pouring them down the drain.
Most importantly, consult the latest safety data sheet provided by your supplier and review it regularly as updates can occur. Follow the International Fragrance Association guidelines for maximum usage levels in each product category to ensure both consumer safety and regulatory compliance.
How To Store & Dispose of Isojasmone B 11
Keep Isojasmone B 11 in a cool dark cupboard away from direct sunlight and any source of heat. A household fridge set around 4 °C can slow down oxidation even more but is optional if space is limited. Wherever you place the bottle make sure the temperature stays steady and below 25 °C.
Air is the enemy of a fresh scent. Use the smallest bottle that will hold your stock so the headspace stays minimal. Top the container up after each transfer if possible or move the remaining liquid to a smaller vial once you pass the halfway mark. This simple habit keeps oxygen out and colour shift to a minimum.
Choose bottles with polycone caps because the soft insert forms a tight seal. Droppers and pipette tops look handy yet they allow slow air creep that will dull the aroma within months. For dilutions made in alcohol or DPG the same rule applies: screw caps first, droppers last.
Label every bottle the day you fill it. Write the material name, CAS number, concentration and the date in clear text. Adding a quick note like “Flammable. Skin irritant” helps anyone who shares your space handle the material correctly.
When a batch reaches the end of its life do not pour it down the sink. Even though Isojasmone B 11 is classed as inherently biodegradable it can still harm aquatic life in high doses. Small leftovers can be soaked into paper then sealed in a bag and placed in chemical waste. Larger volumes should go to a local hazardous waste facility or be collected by a licensed disposal service.
Rinse empty bottles with a little alcohol, let them dry then recycle the glass if accepted by your local program. Caps and seals that smell strongly are best dropped in the same waste stream as the used paper wipes.
Summary
Isojasmone B 11 is a Givaudan floral ingredient built around the scent of fresh jasmine wrapped in a warm green glow. Sitting in the heart of a perfume it bridges light citrus top notes to deeper woods without pulling focus, which explains its steady use in both fine fragrance and everyday products.
The material offers good power at 0.1 % to 1 % so it rarely strains a budget. It stays bright for about three days on a blotter yet can lose sparkle in very alkaline bases or if stored with too much air. Keep caps tight, bottles full and cool for best results.
Most perfumers buy commercial drums directly from Givaudan or approved distributors. Smaller hobby batches are available from specialist resellers and several generic makers offer equivalent grades that perform well in tests.
Whether you need a clean lift in a modern jasmine or a smooth link in a chypre, Isojasmone B 11 remains a reliable choice as long as you watch your dosage and store it with care.