What does Helional smell like?

Helional smells fresh, green and watery, with a floral, ozonic, slightly hay-like character. Perfumers often describe it as marine or airy. It gives perfumes the clean, dewy feel found in many aquatic and fresh floral fragrances.

What is the chemical name of Helional?

Helional is the trade name for 3-(1,3-benzodioxol-5-yl)-2-methylpropanal, CAS 1205-17-0, formula C11H12O3. It's also sold under names like tropional and ocean propanal. It is a synthetic aldehyde aroma chemical used in perfumery.

Is Helional restricted by IFRA?

Helional is understood to have IFRA usage limits that vary by product category. Limits change between IFRA amendments, so check the current IFRA standards and your supplier's IFRA certificate before finalising any formula.

Which notes blend well with Helional?

It pairs well with citrus, green notes, light musks, cucumber or melon-type notes, and florals such as lily of the valley, cyclamen and jasmine. It's commonly used to make floral accords feel fresher and more transparent.

How should I store Helional?

Keep it in a tightly closed glass or aluminium bottle, filled close to the top, in a cool, dark place. As an aldehyde it slowly reacts with air, so close the cap promptly and decant large packs into smaller bottles.

Can I use Helional in soap and detergents?

Yes, Helional is used in fragrance compounds for soaps, shampoos, detergents and fabric conditioners for a fresh, clean note. Test it in your actual base for scent stability and colour, and check IFRA limits for the product type.

Helional Aroma Chemical: Odour, Uses and Safety

Helional is an aroma chemical with a fresh, green, watery-floral odour, often described as ozonic or marine with hints of cyclamen and hay. Perfumers use it in fresh, aquatic and floral fragrances, and in fragrance compounds for soaps, shampoos, detergents and home fragrance products.

Last updated 7 Nov 2026

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Specifications

Formula: C11H12O3
CAS number: 1205-17-0
Grades: Technical

Products and pack sizes

Product	Grade	Pack	Price (incl. GST)	₹ per kg
Helional	Technical	—	₹449	—

What is Helional?

Helional is a trade name for the aroma chemical 3-(1,3-benzodioxol-5-yl)-2-methylpropanal, an aldehyde. It's also sold as tropional or ocean propanal. It's made synthetically.

Formula: C11H12O3
CAS number: 1205-17-0
Molar mass: about 192.2 g/mol
Appearance: colourless to pale yellow liquid
Boiling point: about 282 °C
Density: about 1.16 g/mL
Odour: fresh, green, watery, floral, with ozonic and hay-like facets

Being an aldehyde, it slowly reacts with air, so storage matters. It's quite diffusive, so it lifts the top and heart of a blend. On a blotter it stays noticeable for many hours.

Grades and pack sizes at Azlok

Azlok sells Helional as a perfumery raw material for fragrance blending. It isn't a food, flavour or pharmaceutical ingredient. The listing name doesn't state a pack size, so check the product page. Compare today's price per kg.

Common uses

Fine fragrance: the fresh, airy, watery note in aquatic, ozonic and transparent floral perfumes.
Florals: adds a dewy, green lift to lily of the valley, cyclamen, muguet and white-floral accords.
Personal care: fragrance compounds for soaps, shower gels and shampoos.
Household: fresh notes in detergents, fabric conditioners, cleaners and air fresheners.
Home fragrance: reed diffusers and room sprays with a clean, airy, sea-breeze style.

It's usually a supporting material. It's rarely the main note of a blend.

How to use it

Weigh it on a scale reading to 0.01 g. Don't dose aroma chemicals by drops.
Make a 10% dilution in dipropylene glycol or perfumer's alcohol for smelling and small trial blends.
Pair it with citrus, green notes, light musks and florals for a fresh, clean effect.
Check current IFRA standards before finalising a formula. Helional is understood to be restricted, and limits vary by product type.
Finished cosmetics sold in India must meet CDSCO and BIS requirements.
Patch test finished skin products on the inner arm before regular use.

Safety and storage

Don't apply the neat material to skin. It can cause skin reactions in sensitive people, so wear gloves.
Avoid eye contact and wear safety glasses when decanting.
Work in a ventilated area and smell from blotters, not the bottle.
Not for eating or drinking.
Because it's an aldehyde, keep air out. Close the cap promptly and decant into smaller bottles if you open a large pack often.
Store in a tightly closed glass or aluminium bottle, filled close to the top, in a cool, dark place.
Keep away from heat, flames and strong oxidisers.
Keep out of reach of children, and label decants clearly.
Absorb small spills with paper or sand and dispose of them with solid waste. Don't pour neat material down the drain.

Choosing the right grade and pack

Ask for the supplier's specification sheet, SDS and IFRA certificate before using Helional in products you sell. Smaller packs stay fresher, since less air sits over the liquid once opened, so pick a size you'll use within several months. Fragrance houses and soap or detergent makers needing 25 kg or more can ask for a quote through bulk inquiry.

Frequently asked questions

What does Helional smell like?: Helional smells fresh, green and watery, with a floral, ozonic, slightly hay-like character. Perfumers often describe it as marine or airy. It gives perfumes the clean, dewy feel found in many aquatic and fresh floral fragrances.
What is the chemical name of Helional?: Helional is the trade name for 3-(1,3-benzodioxol-5-yl)-2-methylpropanal, CAS 1205-17-0, formula C11H12O3. It's also sold under names like tropional and ocean propanal. It is a synthetic aldehyde aroma chemical used in perfumery.
Is Helional restricted by IFRA?: Helional is understood to have IFRA usage limits that vary by product category. Limits change between IFRA amendments, so check the current IFRA standards and your supplier's IFRA certificate before finalising any formula.
Which notes blend well with Helional?: It pairs well with citrus, green notes, light musks, cucumber or melon-type notes, and florals such as lily of the valley, cyclamen and jasmine. It's commonly used to make floral accords feel fresher and more transparent.
How should I store Helional?: Keep it in a tightly closed glass or aluminium bottle, filled close to the top, in a cool, dark place. As an aldehyde it slowly reacts with air, so close the cap promptly and decant large packs into smaller bottles.
Can I use Helional in soap and detergents?: Yes, Helional is used in fragrance compounds for soaps, shampoos, detergents and fabric conditioners for a fresh, clean note. Test it in your actual base for scent stability and colour, and check IFRA limits for the product type.