Precyclemone B

What Precyclemone B smells like

Precyclemone B (IFF; also sold as Aldemone) is a clean ozone with aldehydic warmth. IFF describes a clean, tenacious ozone note with aldehydic warmth and diffusion, recommended as a booster for fragrances that need a fresh outdoors effect. Perfumer & Flavorist calls it aldehydic, fresh and powerfully marine and floral, reminiscent of lily-of-the-valley leaves, with incense and sea-breeze nuances; other suppliers add waxy, grapefruit and muguet notes. It is unusually substantive for a fresh note, lasting for days on a blotter.

Leading note

Clean outdoor ozone

Clear facets

Aldehydic

Supporting facets

Marine, lily-of-the-valley leaf

Faint facets

Waxy, incense

Character

Clean, fresh, diffusive, tenacious

• marine
• ozonic
• aldehydic
• floral
• fresh

What makes Precyclemone B distinctive

Fresh air that lasts. Most ozonic notes are fleeting; Precyclemone B is a tenacious, aldehydic, slightly waxy ozone with a muguet-leaf and incense nuance.

How Precyclemone B is used

Used as a booster for fresh, outdoor and line-dried effects in fine and functional fragrance.

Typical role: modifier (used in small amounts to change the character of a blend); lift (adds diffusion and radiance, especially at the top).

How Precyclemone B differs from similar materials

Calone

Calone is distinctly marine and salty; Precyclemone B is an aldehydic, waxy fresh-outdoors ozone.

Myrac Aldehyde

Myrac aldehyde, a related myrcene-derived aldehyde, is brighter, with orange and fruit; Precyclemone B is a cleaner ozone with a muguet-leaf and incense nuance.

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.

Identity and classification

Type

Aroma chemical

Origin

Synthetic

Odour family

Aquatic / Aldehydic

Note position

Heart note

Physical form at room temperature

Liquid

CAS number

52474-60-9

Molecular formula

C14H22O

Molecular weight

206.32 g/mol

IUPAC name

1-methyl-3-(4-methylpent-3-enyl)cyclohex-3-ene-1-carbaldehyde

The CAS number, formula and molecular weight are taken from PubChem compound 103648, whose own record lists this CAS number; checked 19 October 2026.

Safety and compliance

Hazard classification of the neat substance, as PubChem summarises it, read 26 October 2026. Companies notifying the ECHA C&L Inventory report it as not meeting the GHS hazard criteria (1,190 of 1,204 reports). Unless it is harmonised, this is the notifiers' own classification, not a binding one.

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

• Calone

  Aroma chemical · Aquatic / Metallic — marine, watermelon, ozonic, watery

• Floralozone

  Aroma chemical · Aquatic / Floral — ozonic, marine, floral, airy

• Helional

  Aroma chemical · Aquatic / Floral — ozonic, watery, green, floral

• Dihydromyrcenol

  Aroma chemical · Citrus / Aromatic — citrus, lime, fresh, clean

Precyclemone B is also suggested as a partner on the pages for Myrac Aldehyde.

Used in formulas and accords

Used in 2 published formulas

Precyclemone B is an ingredient in 1 perfume formula and 1 base in the Formula & Accord Library.

Community formulas

• Cannabis Base

  Community Formula · Base

RUŌOD House Originals

Original compositions by RUŌOD House.

• Reef Light

  RUŌOD House Original

Further reading

• Aquatic and Marine Notes in Perfumery

  The materials behind aquatic, marine and ozonic perfumes — Calone, watery aldehydes, dihydromyrcenol — and how to build and dose an aquatic accord.

• Aldehydes in Perfumery: The Aliphatic Aldehydes and How to Use Them

  What the aliphatic aldehydes smell like, what they do, how to dose them, which other aldehydes matter, and how to stop them oxidizing.

Questions about Precyclemone B

Sources

• PubChem — compound 103648, checked 19 October 2026.
• PubChem — GHS classification (the ECHA C&L Inventory notifications and any harmonised EU entry), read 26 October 2026.
• IFF — Precyclemone B, via SpecialChem — manufacturer's description.
• Perfumer & Flavorist — Fresh marine notes — published literature.
• Fraterworks — Aldemone — distributor's description.
• Perflavory (The Good Scents Company) — Precyclemone B — odour database.
• Olfactory profile: the RUŌOD Lab team's synthesis of the published descriptions above, reviewed 20 October 2026. Evidence: several independent published descriptions, which agree. Classification and the short description: revision 1. Descriptions of odour are judgement, not measurement.