Rosalva

What Rosalva smells like

Rosalva (IFF; 9-decen-1-ol) is a fresh, dewy rose with a waxy, aldehydic character. Descriptions list dewy, rose, waxy, fresh, clean and aldehydic, and a distributor adds a metallic aspect. Its rosy side is most noticeable at 1% or below; at higher concentrations it turns waxy and oily. On its own it can seem dull, so it is used to blend.

Leading note

Dewy rose

Clear facets

Waxy

Supporting facets

Aldehydic

Faint facets

Metallic

Character

Fresh, dewy, clean, waxy

• rosy
• waxy
• fresh
• aldehydic

What makes Rosalva distinctive

Dew on petals: an aldehydic, waxy freshness that makes a rose accord read wet and just-opened.

Concentration and dilution

Rosy and dewy at 1% or below; waxier and oilier at higher concentration.

How Rosalva is used

Used in rose-petal and fresh floral compositions to add a dewy, aldehydic lift.

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

How Rosalva differs from similar materials

Aldehyde C-9 (Nonanal)

Nonanal is a waxy aldehyde that leans rose and orange; Rosalva is an alcohol, dewier and more specifically rose-petal.

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

Floral / Aldehydic

Note position

Heart note

Physical form at room temperature

Liquid

Also known as

9-Decen-1-ol, Dec-9-en-1-ol

CAS number

13019-22-2

Molecular formula

C10H20O

Molecular weight

156.26 g/mol

IUPAC name

dec-9-en-1-ol

The CAS number, formula and molecular weight are taken from PubChem compound 25612, 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 classify it (1,788 reports): H315 causes skin irritation (100% of reports); H319 causes serious eye irritation (99.7% of 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

• Phenylethyl Alcohol

  Aroma chemical · Floral / Green — rose, honeyed, soft, floral

• Citronellol

  Aroma chemical · Floral / Green — rosy, fresh, citrus, waxy

• Rose Oxide

  Aroma chemical · Floral / Metallic — metallic, green, geranium, rosy

• Geraniol

  Aroma chemical · Floral / Citrus — rosy, sweet, citrus, fresh

Used in formulas and accords

Used in 3 published formulas

Rosalva is an ingredient in 3 perfume formulas in the Formula & Accord Library.

RUŌOD House Originals

Original compositions by RUŌOD House.

• Orange Blossom Chalk

  RUŌOD House Original

• Silver Amber

  RUŌOD House Creation

• Typewriter Ribbon

  RUŌOD House Creation

Further reading

• How to Make a Rose Accord

  Build a rose accord from phenylethyl alcohol, citronellol and geraniol, add acetates and powerful traces from dilutions, and balance it by ratio trials.

• 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 Rosalva

Sources

• PubChem — compound 25612, checked 19 October 2026.
• PubChem — GHS classification (the ECHA C&L Inventory notifications and any harmonised EU entry), read 26 October 2026.
• Scentspiracy — Rosalva — distributor's description.
• De Hekserij — Rosalva (IFF) — distributor's description.
• The Good Scents Company — petal odour category (9-decen-1-ol) — odour database.
• Olfactory profile: the RUŌOD Lab team's synthesis of the published descriptions above, reviewed 20 October 2026. Evidence: more than one published description. Classification and the short description: revision 1. Descriptions of odour are judgement, not measurement.