Hivernal Neo

What Hivernal Neo smells like

dsm-firmenich describes Hivernal Neo as a powerful aldehydic-muguet note with green facets, whose fresh and clean signature is reminiscent of sun-dried laundry, and lists muguet, watery, aldehydic and green as its descriptors. Perfumer's Apprentice repeats that description and adds floral and fresh. Scentree classes it as floral, fresh flowers and aldehydic with plastic and ozonic facets.

Leading note

Aldehydic muguet

Clear facets

Green

Supporting facets

Watery

Faint facets

Ozonic

Character

Clean, fresh, powerful

• muguet
• aldehydic
• green
• watery
• clean
• fresh

What makes Hivernal Neo distinctive

Muguet seen as clean laundry: aldehydic and cool rather than soft and petal-like.

Where the descriptions disagree: Perfumer's Apprentice prints the CAS as 300371-99-9; dsm-firmenich and Scentree give 300371-33-9.

How Hivernal Neo is used

dsm-firmenich says it is used in all kinds of applications to enhance muguet accords and their freshness, and used it in muguet and fruity-floral accords in its Sharing Innovation formulas.

Typical role: modifier (used in small amounts to change the character of a blend).

How Hivernal Neo differs from similar materials

Aquaflora

Aquaflora is the more watery, marine muguet; Hivernal Neo is aldehydic, cool and laundry-clean.

Melafleur

Melafleur is muguet outdoors, with a cool green-melon air; Hivernal Neo is more aldehydic, closer to clean washing.

Each difference compares the published descriptions of the two materials. Smell varies with grade, supplier and dilution; compare them side by side on blotters before substituting one for another.

Formulation considerations

Scentree records no IFRA Standard for it (51st Amendment) and lists the hazard statements H302, H317 (may cause an allergic skin reaction) and H411. dsm-firmenich rates it partially biodegradable. No product sold as plain "Hivernal" was found, so a formula that prints only that name is not read as this material.

Identity and classification

Type

Aroma chemical

Origin

Synthetic

Odour family

Floral / Aldehydic

Note position

Heart note

Physical form at room temperature

Liquid

Also known as

2,3-Dihydro-1,1-dimethyl-1H-indene-ar-propanal

No CAS number is shown. The identity of Hivernal Neo is taken from documentation by dsm-firmenich, Scentree; dsm-firmenich and Scentree give CAS 300371-33-9 for 2,3-dihydro-1,1-dimethyl-1H-indene-ar-propanal, a name that leaves the ring position open; PubChem holds no compound record for that number, so it is kept as evidence and not published. Without a verified number there is no formula, molecular weight or structure drawing either.

Safety and compliance

This page is general information, not a safety assessment or a specification. Confirm identity, composition, IFRA status and allergen content from your supplier's documents for the lot you hold.

Materials it works with

• Hydroxycitronellal

  Aroma chemical · Floral / Green — muguet, floral, soft, sweet

• Florol

  Aroma chemical · Floral / Green — muguet, fresh, floral, clean

• Mayol

  Aroma chemical · Floral / Green — muguet, fresh, clean, floral

Used in formulas and accords

Not currently used in any published formula.

The Formula & Accord Library lists Hivernal Neo here as soon as a published formula, accord or base uses it.

Further reading

• Building a Lily of the Valley (Muguet) Accord After Lilial and Lyral

  Why muguet is always an accord, what changed when Lilial and Lyral were prohibited in the EU, and how modern muguet accords are built and checked.

• Perfume Materials by Odor Family: A Formulator's Palette Map

  Which materials build each odor family — citrus, floral, woody, amber, musk and more — their usual roles, what to watch for, and links to each in depth.

Questions about Hivernal Neo

Sources

• dsm-firmenich — Hivernal® Neo (948605) — manufacturer's description.
• Perfumer's Apprentice — Hivernal Neo (Firmenich) — distributor's description.
• Scentree — Hivernal® Neo — odour database.
• Olfactory profile: the RUŌOD Lab team's synthesis of the published descriptions above, reviewed 26 October 2026. Evidence: more than one published description. Classification and the short description: revision 1. Descriptions of odour are judgement, not measurement.