Key Terms in Flavors and Fragrances

Key Takeaways

• Over 5,000 synthetic fragrance compounds exist globally, with 400–500 in common commercial use across food, cosmetics, and detergent industries.
• Only 4 animal-derived natural fragrances remain in use: musk, civet, castoreum, and ambergris — plant-based sources dominate modern production.
• Natural fragrances are classified into 9 commercial forms: essential oils, extracts, tinctures, absolutes, balsams (pomades), aromatic balsams, resins, resinoids, and oleoresins.
• Fragrance blending relies on 4 key components: main fragrance, conditioning agent, modifier, and fixative — each playing a distinct role in the composition.
• Synthetic fragrances are categorized by functional group into 12+ classes including ketones, aldehydes, alcohols, acids, esters, lactones, ethers, and phenols.
• A complete fragrance composition follows a 3-tier note structure: top note (first impression), body note (main character), and basic note (lasting base).
• ISO 9235 and IFRA standards provide the international regulatory framework for aromatic natural raw materials and fragrance safety.

Flavors and Fragrances Categories at a Glance

Category	Source	Examples	Production Method	Common Use
Natural Fragrances	Plants & animals	Musk, ambergris, rose oil, peppermint oil	Steam distillation, pressing, extraction	Premium perfumery, high-end cosmetics
Synthetic Fragrances	Chemical synthesis	Benzyl acetate, vanillin, synthetic musk	Chemical synthesis from petrochemicals or naturals	Food, cosmetics, detergents, household products
Isolated Fragrances	Natural sources	Menthol from peppermint, citral from lemon	Physical or chemical separation	Flavor & fragrance compounding
Spice Plants	Botanical sources	Pepper, fennel, Sichuan pepper, star anise	Cultivation, pressing, steam distillation	Culinary seasoning, food flavoring

Introduction to Flavors and Fragrances

The flavors and fragrances industry relies on a precise vocabulary to describe raw materials, extraction methods, and blending techniques. Whether you are a sourcing manager evaluating food additives for a new product line or a perfumer selecting aromatic materials for a composition, understanding these terms is essential for effective communication across the supply chain.

This glossary covers the full spectrum of flavors and fragrances terminology — from natural and synthetic perfume raw materials to the nuanced language of fragrance blending. It aligns with the ISO 9235 standard for aromatic natural raw materials vocabulary and reflects current industry practice as governed by the International Fragrance Association (IFRA).

Why this matters to distributors and wholesalers: Flavors and fragrances are regulated differently across markets. A clear understanding of terminology ensures compliance with EFSA flavouring regulations and helps buyers distinguish between natural, synthetic, and isolated materials — each carrying different price points, regulatory statuses, and application profiles.

Fundamental Flavors and Fragrances Terms

This section defines the core vocabulary used throughout the flavors and fragrances industry, covering raw materials, compound types, and classification systems.

Perfume and Perfume Compound

1. Perfume (Fragrant Raw Materials): A substance that can be perceived by smell or taste and serves as the raw material for creating fragrance compositions. Fragrance materials are classified into natural fragrances (animal or plant-derived) and artificial fragrances (isolated or synthetic).

2. Perfume Compound (Blended Fragrance): A mixture of artificially prepared fragrance materials with a defined fragrance type, such as rose, jasmine, mint, sandalwood, pineapple, or lemon. The concentration of each component in a perfume compound is typically expressed as a mass percentage or per mille.

Natural and Synthetic Perfume

3. Natural Perfume: Divided into two categories — animal and plant natural fragrances — both derived from nature. Only four animal-derived natural fragrances remain in common use: musk, civet, castoreum, and ambergris. Plant natural fragrances are produced from flowers, leaves, branches, bark, roots, stems, grasses, fruits, seeds, and resins using steam distillation, pressing, leaching, or absorption. Commercial products include essential oils, extracts, absolutes, tinctures, balsams, and oleoresins.

4. Synthetic Perfume: Fragrance compounds prepared by chemical synthesis using natural or chemical raw materials. Over 5,000 synthetic fragrances exist globally, with 400–500 in common commercial use. By functional group, they are classified into ketones, aldehydes, alcohols, acids, esters, lactones, ethers, phenols, nitriles, hydrocarbons, and acetals. By atomic skeleton, they are divided into terpenes, aromatics, aliphatics, nitrogen-containing, sulfur-containing, and heterocyclic compounds. Notable examples include benzyl acetate (an ester with a jasmine-like aroma) and benzyl benzoate (used as a fixative and solvent in fragrance compositions).

Perfumery Isolates, Spice, and Schiff Base

5. Perfumery Isolates: Monomeric fragrance compounds separated from natural fragrances by physical or chemical methods. For example, menthol isolated from peppermint oil, or citral isolated from lemongrass oil.

6. Spice: Spice plants and their products specifically used for seasoning, such as Sichuan pepper, prickly ash oil, black pepper, pepper oil, fennel, and fennel oil.

7. Schiff Base: Condensation products of amino-containing compounds (such as anthranilates) with aldehydes. Compared with aldehyde-based fragrances, Schiff base fragrances offer longer-lasting aroma and better chemical stability.

Common Terms in Natural Flavors

Natural flavor extraction produces a range of commercial products, each with distinct characteristics and applications. This section defines the nine primary product types.

Essential Oil and Extract (Concrete)

1. Essential Oil: Also known as volatile oil or aromatic oil, this is the primary product of plant natural fragrances. For most plant raw materials, essential oils are produced by steam distillation and pressing — for example, rose oil, peppermint oil, lavender oil, iris oil, fennel oil, and fir oil. For citrus raw materials, essential oils are mainly produced by pressing — for example, tangerine oil, sweet orange oil, grapefruit oil, and lemon oil.

2. Extract (Concrete): A concentrated non-aqueous solvent extract containing essential oils and vegetable waxes. Spice plant raw materials are extracted with a volatile organic solvent, then the solvent is recovered by distillation. The distillation residue is the extract. In addition to essential oils, the extract contains considerable amounts of vegetable waxes and pigments, so most extracts are dark, paste-like or waxy at room temperature. Examples include jasmine extract, sweet osmanthus extract, tuberose extract, and rose extract.

Tincture and Absolute

3. Tincture: Also known as an ethanol solution, a tincture is obtained by leaching plant raw materials, natural resins, or animal secretions with ethanol at room temperature or under heating, followed by cooling, clarification, and filtration. Examples include date tincture, coffee tincture, cocoa tincture, vanilla tincture, and musk tincture.

4. Absolute: Obtained by extracting a concrete, balsam, or resin with ethanol, then freezing to filter out insoluble waxes and impurities, and distilling under reduced pressure to remove ethanol. The resulting fluid or semi-liquid is collectively called absolute oil. Absolutes are relatively pure and are premium materials for cosmetic and perfume formulation.

Balsam, Resin, and Related Terms

5. Balsam (Pomade): Refined animal fat or vegetable oil used to absorb aromatic components from flowers. The fat or oil saturated with aromatic compounds is called balsam or pomade. Pomade can be used directly in cosmetic essences or extracted with ethanol to produce pomade oil.

6. Aromatic Balsam: A paste with fragrant ingredients exuded by spice plants due to physiological or pathological reasons. Most balsams are semi-solid or viscous liquids, insoluble in water, and almost entirely soluble in ethanol. The main components are benzoic acid and its esters, cinnamic acid and its esters. Examples include Peru balm, Tolu balm, benzoin balm, and styrax balm.

7. Resin: Divided into natural resin and processed resin. Natural resins are solid or semi-solid substances formed by terpenoids exuded from plants and oxidized by air. Examples include mastic resin, styrax resin, and liquidambar resin. Processed resins are obtained by removing essential oils from natural resins — for example, rosin is obtained by distilling pine resin and removing turpentine.

8. Resinoid: A concentrated extract with characteristic aroma obtained by leaching plant resins or balsam substances with hydrocarbon solvents. Resinoids are generally viscous liquids, semi-solid, or solid homogeneous masses. Examples include mastic resinoid and benzoin resinoid.

9. Oleoresin: A concentrated extract with characteristic aroma or flavor obtained by extracting natural spices with a solvent and then distilling off the solvent. Commonly used solvents include acetone, dichloromethane, and isopropanol. Oleoresins are usually viscous liquids with a darker color and non-uniform consistency. Examples include chili oleoresin, pepper oleoresin, and turmeric oleoresin.

Common Terms in Spice Blending

Spice blending is both an art and a science. This section defines the terminology used to describe fragrance characteristics, aroma structure, and blending techniques.

Fragrance Type, Note, and Odor Concentration

1. Fragrance Type (Type): Describes the overall aroma style of a fragrance or fragranced product, such as floral, rose, jasmine, woody, or cologne type.

2. Note: Describes a specific aroma tone within a fragrance, essence, or fragranced product, rather than the overall aroma. Distinguishing notes is a complex task requiring trained olfactory expertise.

3. Odor Concentration: Also known as aroma intensity, this refers to the inherent strength of a fragrance. It can be evaluated by the odor value of the aromatic material — the lower the odor value, the greater the aroma intensity.

Top Note, Body Note, and Basic Note

4. Top Note: The first impression of a fragrance — the aroma characteristic perceived immediately upon smelling. Top notes are generally produced by highly diffusive fragrance materials. The fragrances acting as top notes in a composition are called top note materials.

5. Body Note: Also known as the middle note, this is the main fragrance of the composition. The body note is the aroma perceived immediately after the top note dissipates and remains stable and consistent for an extended period. It is the most important aroma characteristic of the fragrance. The material providing the body note is called the main fragrance (Base).

6. Basic Note: Also known as the tail or bottom note, this is the final aroma remaining after the top and body notes have evaporated. It is generally produced by low-volatility fragrance materials or fixatives. The material providing the base note is called a fixative.

Blending, Modify, and Fragrance Base

7. Blending (Blend): The mixing of several fragrance materials to produce a coordinated aroma. The purpose is to make the fragrance beautiful, fresh, strong, or subtle, enabling the main agent to perform optimally. Fragrance materials that serve this blending role are called blending agents or coordinators (Blender).

8. Modify: Using the aroma of one fragrance material to modify the aroma of another, giving it a specific effect within the composition and making the aroma unique. Fragrance materials that perform this role are called modifiers (Modifier).

9. Fragrance Base: Also known as a flavor base, this is the main agent of a fragrance composed of several materials. Fragrance bases have specific aroma characteristics or represent a particular aroma type. They are generally not used directly in flavored products but serve as a raw material in fragrance compositions.

Key Components of Fragrance Blending

A well-crafted fragrance composition requires four essential components, each serving a distinct purpose. Understanding these roles is critical for professionals working in flavors and fragrances formulation.

The Four Main Components of Flavor

① Main Fragrance: The raw material that gives the fragrance its basic character and represents the main body of the entire composition’s aroma.

② Conditioning Agent: Typically shares a similar rhythm with the main fragrance. It blends the various components of the main fragrance to create harmony within the composition.

③ Modifier: Generally composed of fragrance materials with a different rhythm from the main fragrance. It modifies the main aroma and changes the aromatic components of the fragrance style, making the overall aroma richer, more multi-toned, and more distinctive.

④ Fixative: Composed of fragrance materials with long-lasting aroma and low volatility. It ensures the fragrance volatilizes evenly and the aroma lasts for an extended period.

The preparation of a specific fragrance requires combining these four components in appropriate ratios, allowing each material to complement the others, achieve harmony and balance, and produce a pleasant aroma from beginning to end.

Frequently Asked Questions

Below are answers to common questions about flavors and fragrances terminology, from natural vs. synthetic classification to fragrance blending components.