Raspberry Ketone (CAS 5471-51-2) Technical Ingredient Overview
🏭 Manufacturer — Various industrial fragrance suppliers
🔎 Chemical Name — 4-(4-Hydroxyphenyl)butan-2-one
🧪 Synonyms — Raspberry Ketone, Frambinone, Rheosmin, Oxyphenylon, p-Hydroxybenzylacetone
🧬 Chemical Formula — C₁₀H₁₂O₂
📂 CAS Number — 5471-51-2
📘 FEMA Number — 2588
🌍 Council of Europe — 755
🇪🇺 Flavis Number — 7.055
⚖️ Molecular Weight — 164.20 g/mol
🌡️ Melting Point — 82-83°C
📝 Odor Type — Fruity / Sweet
📈 Odor Strength — High
👃🏼 Odor Profile — Fruity, sweet, powdery, with red fruit facets; soft and delicate in drydown
⚗️ Uses — Enhances fruity base notes (berries, red fruits); adds powdery softness; effective in fruity florals and gourmand structures
🧴 Appearance — White crystalline solid or off-white powder
💧 Solubility — Slightly soluble in water; soluble in alcohol, ether, and most organic solvents
What is Raspberry Ketone?
Raspberry Ketone, chemically named 4-(4-hydroxyphenyl)butan-2-one, is a synthetic aromatic ketone structurally related to vanillin and zingerone. It is one of the key odorants associated with raspberry fruit aroma, although it occurs only in trace amounts in nature (approximately 1-4 mg/kg in fresh raspberries). The compound is also found naturally in other Rubus species including blackberries and cranberries, as well as in certain orchid flowers such as Dendrobium species.
First synthesized in the early 20th century and introduced to perfumery in the mid-20th century, Raspberry Ketone has become an indispensable ingredient thanks to its low odor threshold, high tenacity, and excellent blending compatibility with fruit and floral materials.
Historical Background
Raspberry Ketone was first isolated and characterized from natural raspberry sources in the early 1900s, though its commercial synthesis and application in perfumery began in earnest during the 1950s-1960s. The molecule's structural similarity to vanillin (differing by a two-carbon chain extension) made it accessible through established synthetic routes, and perfumers quickly recognized its value for creating realistic berry accords.
The ingredient gained prominence as fruity-floral compositions became increasingly popular in the latter half of the 20th century, finding particular success in youth-oriented fragrances, body care products, and modern gourmand perfumes. Its approval as FEMA GRAS (Generally Recognized as Safe) for flavor use further expanded its applications across both fragrance and flavor industries.
Olfactory Profile
Scent Family
Fruity-sweet with powdery undertones
Main Descriptors
Raspberry Ketone offers a delicate yet persistent red fruit tone with a sweet, berry-like opening that transitions into a smooth powdery drydown. The powdery effect is similar to heliotropin or benzyl salicylate but less floral and more fruit-focused. At higher concentrations, it exhibits jammy, preserve-like characteristics with subtle woody-warm undertones.
Odor Characteristics:
Top Note: Sweet, fresh raspberry with berry-jam nuances
Heart: Red fruit fullness, ripe berry character
Base: Soft, powdery, subtly warm with delicate sweetness
Intensity & Volatility
Odor Strength: High impact at low concentrations
Odor Threshold: Low (highly perceptible at trace levels)
Volatility: Middle to base note; low volatility but high substantivity
Tenacity: Excellent persistence; long-lasting on blotter and skin
Performance Characteristics
Raspberry Ketone demonstrates high compatibility with musks, violet notes, aldehydes, and gourmand bases. It functions as both a primary fruity note and as a supporting modifier that adds natural fruitiness without cloying sweetness.
Synergistic Combinations:
Zingerone (structural relative): Creates enhanced raspberry realism; ideal ratio 8-10:1 (raspberry ketone:zingerone)
Ethyl Maltol, Furaneol: Amplifies sweetness and cotton-candy facets
Methyl Anthranilate: Supports grape-berry blends
Ionones, Musks: Adds roundness, diffusion, and depth
Vanillin, Heliotropin: Harmonious powdery-sweet combinations
Applications in Fine Fragrance
Primary Applications:
Fruity-floral perfumes (raspberry-rose, peony-fruit accords)
Gourmand compositions (red fruit & vanilla blends)
Modern chypres and teen-oriented fragrances
Body sprays and light eau de toilettes
Typical Usage Levels:
Fine Fragrance: 0.1-2%
Body Care: 0.5-3%
Functional Products: Up to 5%
Notable Effect: As Arctander notes, "This ketone is used in perfume compositions, particularly in Jasmin, Gardenia, Tuberose, etc. where floral notes need fruity undertones, or where fruity notes need fixation and supporting delicate sweetness" (Arctander, 1969).
Industrial & Technical Uses
Flavor Applications (FEMA 2588):
Berry-flavored beverages and confectionery
Bakery products and dessert flavoring
Functional fruit aromas in oral care
Ice cream and dairy applications
Cosmetic Fragrance:
Lotions, creams, and body powders
Hair care products
Scented cosmetics
Stability: Chemically stable in fragrance formulations; may discolor slightly under prolonged UV exposure or extreme pH conditions.
Regulatory & Safety Overview
IFRA Status: Not restricted under IFRA 51st Amendment
EU Cosmetics Regulation (EC 1223/2009): Permitted; not listed among the 26 declarable fragrance allergens
FEMA GRAS: ✅ FEMA 2588; approved for flavor use in food and beverages
JECFA Evaluation: Evaluated and approved by the Joint FAO/WHO Expert Committee on Food Additives
ECHA: Registered under REACH; not classified as hazardous under CLP Regulation
Council of Europe: Listed (No. 755)
Toxicology: Generally recognized as safe at standard perfumery and flavoring concentrations. No known sensitization or phototoxicity at recommended use levels. Not classified as a skin sensitizer or allergen.
Safety Note: While marketed in some regions as a dietary supplement for weight management, such applications fall outside validated fragrance and flavor uses and lack conclusive scientific support.
References
Arctander, S. (1969). Perfume and Flavor Chemicals (Aroma Chemicals). Self-published, Montclair, NJ.
Bauer, K., Garbe, D., & Surburg, H. (2001). Common Fragrance and Flavor Materials: Preparation, Properties and Uses (4th ed.). Wiley-VCH.
European Commission. (2024). CosIng – Cosmetic Ingredient Database. Retrieved from https://ec.europa.eu/growth/tools-databases/cosing/
FEMA (Flavor and Extract Manufacturers Association). (2024). FEMA GRAS Database – FEMA No. 2588. Retrieved from https://www.femaflavor.org
JECFA (Joint FAO/WHO Expert Committee on Food Additives). Evaluation of raspberry ketone. Retrieved from https://apps.who.int/food-additives-contaminants-jecfa-database/
Leffingwell & Associates. (2024). Fragrance Ingredient Reviews. Canton, GA.
Park, K. S. (2015). Raspberry ketone, a naturally occurring phenolic compound, inhibits adipogenic and lipogenic gene expression in 3T3-L1 adipocytes. Pharmaceutical Biology, 53(6), 870-875.
PubChem. (2025). Compound Summary for CID 10621 (Raspberry Ketone). National Center for Biotechnology Information. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/10621
Surburg, H., & Panten, J. (2006). Common Fragrance and Flavor Materials: Preparation, Properties and Uses (5th ed.). Wiley-VCH.
Wright, J. (2014). Flavor Bites: 4-(P-Hydroxyphenyl)-2-butanone. Perfumer & Flavorist, 39, 26-28.