Industrial grade 99% Fragrance Grade，Benzyl benzoate CAS 120-51-4

What is benzyl benzoate? How does it work? What are all the uses of fragrance grade benzyl benzoate?

1. What is Benzyl benzoate? How does it work?

Benzyl benzoate, also known as benzyl benzoate (or benzoic acid benzyl ester), is an ester formed from benzyl alcohol and benzoic acid. It is one of the most widely used fixatives, solvents, and flavoring components in the fragrance and flavor industry. Its molecular formula is:

C14H12O2 (C6H5COOCH2C6H5, molecular weight approximately 212.25; CAS No.: 120-51-4; EC No.: 204-402-9; FEMA No.: 2137)

It is a colorless to slightly yellow oily liquid at room temperature (it can solidify into white solid flakes at low temperatures), with a faint and sweet balsamic aroma. The fragrance is described as slightly sweet, balsamic, oily, and slightly herbal, floral, and fruity. Its density is 1.118 g/cm³ (20℃), melting point 17-21℃, boiling point 323-324℃, flash point 148℃, vapor density 7.31, and it is almost insoluble in water (0.0153 g/L, 20℃), but soluble in most organic solvents such as ethanol and ether. It has extremely low vapor pressure and volatility. Industrially, it is prepared by reacting sodium benzoate with benzyl chloride, as a byproduct of toluene oxidation, or by the Tishchenko reaction of benzaldehyde. It occurs naturally in flowers such as tuberose, hyacinth and jasmine as well as in Peruvian balsam and toluene balsam and is therefore a classic fragrance material that can be found in both natural and synthetic forms.

Benzyl benzoate has 2 benzene rings and an ester group in its structure. The 2 aromatic rings mean it has a very high affinity for aromatic fragrances (like dissolves like) and is a great fragrance solvent. The ester group gives it a mild sweet, balsamic aroma. It is almost non-volatile because of the low total molecular vapor pressure. It can realize the dual properties of “fixing fragrance” and “solubilizing fragrance”, and is an indispensable functional ingredient in fragrance formulation.

Benzyl benzoate is a stable aromatic ester, not easy to hydrolyze, heat-resistant, good storage properties, almost non-volatile (boiling point 323°C, extremely low vapor pressure), low skin irritation and low acute toxicity (it can be rapidly hydrolyzed in the body to benzoic acid and benzyl alcohol and metabolized and excreted), it meets the safety requirements for fragrance raw materials; but it has some toxicity to aquatic organisms (GHS H411), and environmental protection considerations are needed for its daily and industrial use. Keep away from strong oxidizers. Store in a tightly closed container, in a dry place.

In terms of grading, the "fragrance grade" referred to in this article refers to benzyl benzoate specifications that meet the quality and safety standards of the fragrance and flavor industry (such as IFR usage guidelines and cosmetic raw material requirements), and are used in perfume, cosmetic, daily chemical and food flavor formulations;

From the perspective of mechanism of action, benzyl benzoate exerts its effect through the unique properties of "fragrance fixation and sustained release + solvent dissolution + fragrance harmonization + safety and compatibility". The mechanism of action in different fragrance applications is as follows:

1.Fixative and sustained-release mechanism (low vapor pressure locks in the top notes)

Benzyl benzoate has an extremely low vapor pressure and is almost non-volatile. When added to fragrances, it can "lock in" volatile top notes and slow down their escape from the skin or product surface, allowing the top, middle, and base notes to be released slowly and in sequence, significantly extending the fragrance time. This is its core mechanism as a fixative.

2.Solvent-based fragrance dissolution mechanism (like dissolves like)

The two benzene rings offer good solubility to aromatic fragrance raw materials, such as fragrance resins, crystalline fragrances and essential oils. The ester group can also dissolve polar constituents. It is an important solvent and diluent in fragrance-blending operations and can uniformly dissolve and dilute solid or high-viscosity fragrances to a blendable, sprayable concentration.

3.Perfume blending mechanism (sweet balsam floral notes)

Benzyl benzoate has a soft, sweet balsamic, floral and slightly fruity scent. It can be mixed and altered with the fragrance of other fragrances, resulting in a rounded and harmonious overall scent. It is also naturally found in flowers such as tuberose, hyacinth and jasmine, and is an important fragrance ingredient to recreate these natural floral scents.

4.Safety and compatibility mechanism (low irritation and low toxicity)

Benzyl benzoate has low skin irritation and low acute toxicity. It is metabolized in the body into benzoic acid and benzyl alcohol and excreted. It has good compatibility with skin and formulation systems and complies with the fragrance industry's usage standards such as IFRA, making it a classic fragrance raw material that can be safely used in cosmetics, daily chemical products and food flavorings.

In summary, benzyl benzoate is a three-in-one raw material in the fragrance and flavor industry, serving as a fixative, solvent, and blending agent: as a fixative, it locks in the top notes and prolongs the fragrance with low vapor pressure; as a solvent, it dissolves and dilutes fragrance raw materials; and as a blending component, it contributes sweet balsamic floral aromas. It is one of the most widely used benzoic acid ester fragrance raw materials.

II. What are all the uses of fragrance-grade Benzyl benzoate?

The fragrance-grade applications of benzyl benzoate revolve around three main functions: fixation, dissolution, and blending.

1.Perfume and daily chemical fragrance fixatives (core application in the fragrance and flavor industry)

Application Areas: Perfume, daily chemical products, and home fragrance.

Corresponding Products: Perfume/cologne/eau de toilette fragrance, soap/shower gel/shampoo fragrance, laundry detergent/fabric softener fragrance, face cream/lotion/makeup fragrance, scented candle/air freshener fragrance.

Why it works for this purpose: Benzyl benzoate has an extremely low vapor pressure and is almost non-volatile, which slows down the escape of volatile top notes in fragrances, allowing the fragrance to be released slowly and stably, significantly prolonging the scent's lasting power. Its fixing effect is universal for perfumes, daily chemical products, and home fragrances—regardless of whether the product carrier is alcohol, soap base, lotion, or wax, the low-volatility fixing mechanism is completely consistent, hence it is combined into one point.

2.Fragrance solvents and diluents (core application in the field of fragrance blending and preparation)

Application Areas: Flavor processing, fragrance blending.

Related products include solvents for fragrance resins/extracts, solvents for crystalline fragrances such as vanillin and musk, essential oil diluents, base solvents for fragrance blending and fragrance premix intermediates.

Why it works for this purpose: Benzyl benzoate’s bibenzene ring structure and good dissolving power for aromatic fragrance raw materials and its ester group dissolves polar components. It can uniformly dissolve and dilute solid or high viscosity fragrance resins, crystal fragrances and concentrated essential oils to a suitable concentration for fragrance blending, spraying and stable storage. It is the only solvent and diluent used in operations of fragrance blending.

3.Floral fragrance components (perfume industry)

Usage: in floral and complex fragrance compositions.

Related Products: Fragrances of the floral type such as tuberose, hyacinth, jasmine, gardenia; fragrances of the balsam-type oriental type; and complex daily chemical fragrances.

Why it works in this application: Benzyl benzoate is found in the flowers of tuberose, hyacinth and jasmine. It has a sweet, balsamic, floral and slightly fruity aroma. In perfumery it provides a base note, and blends and alters the odors of other fragrances to produce a harmonious and rounded overall scent. It is also a key element in the reproduction of the characteristics of these natural floral scents and is a classic base ingredient in floral fragrance formulations.

4.Flavoring components of food flavorings (food flavoring industry, compliance specifications)

Use Areas: Flavor & Fragrance Industry for Food.

Related Products:Flavor ingredients for confectionery/baking /beverage/dairy flavors. Base materials for edible flavor formulations.

Why it works for this: Benzyl benzoate (FEMA 2137) has a mild, sweet, balsamic flavor which can be used in food flavor formulations to add aroma and roundness. It’s low volatility also helps retain flavor and stability for longer periods of time. For food applications, it shall be used in specifications in conformity with food safety standards (such as GB 2760 usage regulations) and in the prescribed dosage. It is a functional component in food flavoring industry.

To summarize, Benzyl benzoate (CAS 120-51-4, FEMA 2137) is the most popular benzoate raw material in the fragrance and flavor industry. It has four major mechanisms, namely “fixation and sustained release, solvent dissolution, fragrance harmonization and safety compatibility”, so it is maturely used in perfumes and cosmetics (fixants), fragrance processing (solvents and diluents), floral fragrance blending (fragrance components), and food flavorings (flavor components). It has low volatility, low irritation and strong compatibility with aromatic systems, making it a classic fragrance raw material that integrates fixing, dissolving and blending functions in perfume, cosmetic, cosmetic and food flavor formulations.