Why Isobutyl Benzoate is Essential for Floral and Fruity Fragrance Formulations

The global fragrance market continues to shift toward nuanced, complex scent profiles. Perfumers and cosmetic formulators constantly seek reliable raw materials that bridge top notes with warm, lasting base harmonies. Among these specialized esters, Isobutyl Benzoate (CAS 120-50-3) stands out as a fundamental ingredient for creating rich floral accords and vibrant fruity compositions.

As a dedicated manufacturer and supplier of cosmetic and fragrance raw materials, Zhishang Chem produces high-purity Isobutyl Benzoate engineered to meet strict international compendial standards. In this technical overview, we examine the olfactive character, chemical stability, and compounding versatility of Isobutyl Benzoate in modern perfumery.

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What is Isobutyl Benzoate? Core Chemical and Olfactive Specifications

Isobutyl Benzoate is an organic ester formed by the condensation of isobutanol and benzoic acid. Known chemically as 2-methylpropyl benzoate, this colorless clear liquid delivers a characteristic sweet, floral, and fruity aroma profile with mild balsamic undercurrents.

To ensure seamless integration into large-scale batch compounding, purchasing managers and formulation chemists require consistent physical and chemical parameters. Below are the standard manufacturing specifications maintained for our commercial export grade:

Specification Parameter	Technical Standard
CAS Number	120-50-3
Molecular Formula	C11H14O2
Molecular Weight	178.23 g/mol
Purity (GC)	≥ 99.0%
Appearance	Clear, colorless liquid
Odor Profile	Sweet, herbaceous, floral, warm fruity (berry/cherry accents)
Specific Gravity (20/20°C)	1.000 – 1.005
Refractive Index (20°C)	1.492 – 1.496
Flash Point	> 100°C (Closed Cup)
Solubility	Soluble in alcohol and oils; insoluble in water

Maintaining high gas chromatography (GC) purity guarantees that batch-to-batch olfactory variation remains near zero—a critical requirement for global fragrance brands.

Olfactory Character: Boosting Floral Notes and Brightening Fruit Accords

Understanding how Isobutyl Benzoate behaves within a scent pyramid requires examining its dual aroma profile. Unlike volatile top notes that evaporate rapidly, Isobutyl Benzoate functions as a heart-to-base modifier.

Enhancing Floral Structures

In floral compositions, Isobutyl Benzoate provides a rich, natural green-herbaceous backing. It pairs exceptionally well with heavy white florals and delicate blossoms:

Ylang-Ylang & Jasmine: Smooths harsh indolates and reinforces natural carnal warmth.
Tuberose & Neroli: Adds depth to radiant white petals, preventing the accord from smelling overly synthetic.
Carnation & Rose: Works in harmony with eugenol and rose alcohols, adding an authentic, freshly cut stem quality.

Illuminating Fruity Accords

When introduced into fruity accords, it softens sharp synthetic aldehyde edges. It contributes a sweet, ripe nuance to:

Berry Blends: Raspberry, blackberry, and strawberry accords benefit from its smooth balsamic undertone.
Stone Fruit: Enhances peach, plum, and cherry formulations by imparting a velvety, natural mouthwatering aura.

The Fixative Advantage: Extending Scent Retention on Skin and Textiles

Beyond aroma contribution, Isobutyl Benzoate serves a key functional purpose in perfumery: it acts as a secondary fixative and solvent.

Evaporation rates dictate how a fragrance evolves over time. High volatility ingredients dissipate quickly, while low volatility fixatives slow down the loss of lighter aromatic compounds. With its moderate vapor pressure and high boiling point of approximately 242°C, Isobutyl Benzoate depresses the vapor pressure of volatile citrus, green, and fruity top notes.

In traditional scent pyramids, top notes like citrus and green elements evaporate rapidly. Isobutyl Benzoate bridges the heart notes (floral and fruity accords) by acting as a modifier, while simultaneously extending into the base notes (musk, amber, and woods) to enhance overall tenacity and fixation.

By anchoring volatile notes, it yields several practical performance benefits:

Enhanced Tenacity: Extends wear time on human skin in fine fragrance and eau de parfum (EDP) applications.
Fabric Retention: Improves scent longevity on laundered garments when incorporated into fabric conditioners and laundry detergents.
Solvent Capability: Assists in dissolving solid aromatic raw materials, musks, and resinoids without clouding the final wash.

Formulation Guidelines: Dosage Rates Across Personal Care and Fine Fragrance

Formulating with Isobutyl Benzoate requires a precise balance. Because its sweet balsamic character is distinct, overuse can overpower delicate citrus elements, whereas under-dosing misses the fixative synergy.

The following concentration ranges represent practical usage benchmarks across varied finished product formats:

Fine Fragrance (Perfumes & EDPs): 1.0% to 5.0% of the total fragrance concentrate. Used to round out floral hearts and anchor fruity top-notes.
Personal Care (Body Washes, Lotions, Creams): 0.2% to 1.5%. Provides stable scent delivery in rinse-off and leave-on emulsion bases without discoloration.
Hair Care (Shampoos & Conditioners): 0.1% to 1.0%. Helps mask raw surfactant odor bases while leaving a clean floral-fruity trail.
Home Care (Air Fresheners, Cleaners, Candles): 0.5% to 4.0%. Offers strong thermal stability in warm wax bases and ambient evaporation systems.

When developing new formulations, perform stability testing across temperature extremes (4°C, 25°C, and 45°C) over 12 weeks to confirm color stability and scent retention in your specific matrix.

Regulatory Compliance, Safety Profile, and Global Standards

Navigating international trade and safety compliance is paramount for global cosmetic and chemical sourcing. Isobutyl Benzoate (CAS 120-50-3) is fully registered and documented for commercial cosmetic and fragrance manufacturing worldwide.

Regulatory Documentation & Safety Highlights:

IFRA Compliance: Complies with International Fragrance Association (IFRA) standards when used within established safe exposure limits for specific product categories.
REACH & Global Inventories: Registered on major chemical inventories, including US TSCA, EU REACH, Australian AICIS, and China IECSC.
Quality Documentation: Every batch supplied by Zhishang Chemical is accompanied by a full Certificate of Analysis (COA), Safety Data Sheet (SDS) compliant with GHS Revision 8, and Technical Data Sheet (TDS).
Skin Compatibility: Non-sensitizing at standard use levels in leave-on cosmetic formulations, offering low irritation potential compared to unrefined natural oils.

Our quality control lab tests every export shipment using high-performance gas chromatography and refractometry to verify compliance before dispatch.

Why Source Isobutyl Benzoate from Zhishang Chem?

As a direct chemical manufacturer and international supplier specializing in fragrance ingredients, cosmetic raw materials, and fine chemical intermediates, Zhishang Chem provides end-to-end supply chain reliability. Our complete workflow moves seamlessly from raw material synthesis to GC quality testing, custom packaging, and direct global export logistics.

Our Manufacturing & Supply Capabilities:

Consistent Batch Quality: Automated synthesis lines guarantee purity levels of ≥ 99.0%, reducing batch variations for your blending line.
Flexible Packaging Options: Standard drums (200 kg steel/HDPE drums), 1000 kg IBC totes, or custom ISO tanks based on purchase volume.
Global Logistics Support: Experienced export teams handling hazardous and non-hazardous sea freight, air cargo, and customs clearance procedures globally.
Sample Testing: Free evaluation samples (100g – 500g) available for R&D laboratories, perfumers, and formulation testing upon request.

Request Technical Data, COA, or Bulk Quotation Today

Isobutyl Benzoate remains a cornerstone ingredient for perfumers seeking to elevate floral accords, add realism to fruity fragrances, and enhance overall scent longevity. Partnering with a reliable direct manufacturer ensures your production line maintains steady supply, competitive pricing, and rigorous purity standards.

Whether you are scaling up a new fine fragrance line or optimizing raw material costs for personal care manufacturing, Zhishang Chemical is ready to support your formulation requirements.

Contact Our Sales & Technical Team:

Official Website: https://www.zhishangchem.com/
Inquiries & Quotes: Contact our online service team directly on the site for pricing, COA requests, and sample dispatch.
Technical Support: Request customized batch certificates, SDS sheets, or regulatory dossiers tailored to your destination market.

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企业介绍

Zhishang Chem is located in Hisense Chuangzhi Valley, High tech Zone, Jinan City, Shandong Province. It is a professional fine chemical raw material source supplier that integrates research and development, supply, and foreign trade export. The company has been deeply involved in the field of fine chemicals for many years, specializing in various industrial and fine chemical raw material products. With stable source factory production capacity, strict quality control system, and mature cross-border supply chain, it can provide standardized and customized chemical raw material supply solutions for global customers.

We focus on foreign trade and chemical export business, familiar with quality inspection standards and compliance requirements of various countries, covering the entire process of product testing, packaging customization, logistics transportation, delivery and after-sales services. We always empower global procurement customers with stable supply, high-quality, and efficient services, effectively solving core pain points such as unstable procurement cycles, uneven quality, and cumbersome export compliance for customers.

Since its establishment, the company has always adhered to the development concept of integrity management and quality-oriented, and deeply cultivated the global chemical market. The core vision of the enterprise is to become the world’s most trusted chemical supplier, continuously deepen product upgrades and service optimization, and strive to provide reliable, efficient, and sustainable chemical raw material supply services for domestic and foreign partners, creating a highly competitive global chemical supply brand.

References

International Fragrance Association (IFRA). IFRA Standards and Guidance for Fragrance Ingredient Safety, IFRA Code of Practice. Available at: https://ifrafragrance.org/
Research Institute for Fragrance Materials (RIFM). Toxicology and Safety Assessment of Isobutyl Benzoate in Cosmetic and Household Products. Food and Chemical Toxicology.
U.S. National Center for Biotechnology Information (NCBI). PubChem Compound Summary for CID 8438: Isobutyl Benzoate (CAS 120-50-3). Available at: https://pubchem.ncbi.nlm.nih.gov/compound/8438
European Chemicals Agency (ECHA). Registered Substances Dossier: Isobutyl Benzoate (EC 204-402-9). European Union REACH Registration.
Appell, L. (1982). The Formulation and Preparation of Cosmetics, Fragrances and Flavors. Perfumer & Flavorist Books.

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