Rosalva

Synthetic Ingredient Overview

• 🏭 Manufacturer: IFF

• 🔎 Chemical Name: dec-9-en-1-ol

• 🧪 Synonyms: Rosalva

• 🧬 Chemical Formula: C₁₀H₂₀O

• 📂 CAS N°: 13019-22-2

• ⚖️ Molecular Weight: 156.26 g/mol

• 📝 Odor Type: Floral – Rosy – Aldehydic

• 📈 Odor Strength: High

• 👃🏼 Odor Profile: Fresh, green, aldehydic-dewy rose; waxy, oily-floral with tenacity. Rosy character intensifies at 1% dilution or lower.

• ⚗️ Uses: Floral-rosy modifier, aldehydic floral booster, laundry-grade radiance, herbal fragrance support

• 🧴 Appearance: Colorless oily liquid

What is Rosalva?

Rosalva is a synthetic unsaturated aliphatic alcohol introduced in the late 1950s. It is chemically simple but olfactorily complex, with a scent profile that bridges green aldehydes, waxy floral alcohols, and soft rose molecules. Its formula, dec-9-en-1-ol, delivers exceptional diffusion and tenacity, performing effectively across both fine fragrance and high-performance detergent systems.

Unlike typical fatty floral alcohols, Rosalva maintains brightness and non-fatty clarity, making it especially valuable when precision is required in aldehydic-floral compositions.

Olfactory Profile & Perfumery Applications

👃🏼 Scent Description:

• Strongly aldehydic, waxy, and dewy

• Rosy, floral, slightly herbal in diluted use

• More oily-waxy in concentrated form

• Long-lasting and structurally radiant, especially when blended with other linear alcohols or aldehydes

⚗️ Functional Roles:

• Adds lift and persistence to rose, peony, hyacinth, or aldehydic floral accords

• Boosts diffusion in herbal-green fragrances

• Enhances modern detergent fragrance radiance, especially in powder or bar formats

• Supports floral backgrounds in functional bases (fabric care, shampoos)

🧴 Formulation Compatibility:

• Blends well with aliphatic aldehydes, isobutylquinoline, ionones, and Styrax derivatives

• Recommended for pairing with Norhexahydrofarnesal and lily alcohols in soap-compatible builds

• Non-discoloring and stable under alkaline conditions

Industrial & Technical Uses

• Fine fragrance: Aldehydic florals, classic rose compositions, modern green florals

• Functional perfumery: Soap, detergent, and fabric softener bases

• Crossover applications: Can unify top-to-heart phases in citrus-rose or green-fruity blends

• Not used in flavor: No FEMA registration; not classified for ingestible use

Stability Overview

🧪 Solubility: Insoluble in water; soluble in alcohol and oil systems
🔥 Thermal Stability: Stable under conventional hot soap and detergent production conditions
🧼 Ideal for:

• Bar soap fragrances

• Powdered laundry care

• Aldehydic muguet-lily or herbal-rose hybrids

• Complex blends requiring aldehydic-fresh lift with soft floral persistence

Regulatory & Safety Overview

• IFRA: Permitted; no specific restriction under 51st Amendment

• EU Allergens: Not among the 26 declarable fragrance allergens

• ECHA (REACH): Registered; not classified as hazardous

• Toxicology:

  • Non-sensitizing at normal use levels

  • Biodegradable; low bioaccumulation potential

  • High oxidative stability and low photo-reactivity

✅ Safe for use in all fragrance applications within recommended concentration limits.

Sources

• IFF Ingredient Datasheet – Rosalva

• S. Arctander – Functional Aliphatic Alcohols (1959)

• ECHA Substance Database (13019-22-2)

• Fulvio Ciccolo – Internal Use Commentary, 2023