Linalool (CAS 78-70-6) is a fascinating molecule whose chemical structure and properties are the foundation of its widespread use in the fragrance, flavor, and chemical industries. As a B2B chemical supplier, understanding the molecular intricacies of compounds like Linalool allows us to better serve our clients. This article explores the chemistry behind Linalool, explaining why it is such a valuable ingredient.

Molecular Structure and Isomers:
Linalool is a naturally occurring monoterpene alcohol with the chemical formula C10H18O. Its structure features a ten-carbon chain with two double bonds and a hydroxyl (-OH) group. A key aspect of Linalool's chemistry is its chirality. It exists as two enantiomers: (R)-(-)-linalool (also known as licareol) and (S)-(+)-linalool (also known as coriandrol). These isomers, while sharing the same chemical formula, have slightly different scent profiles and occur in different natural sources. For instance, (R)-(-)-linalool is abundant in lavender and rosewood, contributing to their characteristic calming aroma, while (S)-(+)-linalool is found in coriander and sweet basil. Commercial Linalool is often a racemic mixture (dl-linalool) or one of the specific enantiomers, depending on the intended application.

Physical and Chemical Properties:
Linalool is typically a colorless liquid with a distinctive floral and slightly woody aroma. Its low boiling point and volatility contribute to its effectiveness as a top-note ingredient in fragrances, providing initial freshness and diffusion. Key physical properties include:

  • Appearance: Colorless liquid
  • Molecular Weight: 154.25 g/mol
  • Boiling Point: Approximately 198°C
  • Flash Point: Around 71°C
  • Solubility: Insoluble in water but readily soluble in organic solvents like ethanol and ether.

Chemically, Linalool is relatively stable in alkaline conditions, making it suitable for use in soaps and detergents. However, it can undergo isomerization in acidic media and oxidation upon exposure to air, which can alter its scent profile and, in some individuals, cause skin sensitization. This oxidative potential is why proper storage – in cool, dark, and airtight containers – is essential for maintaining its quality.

Applications Driven by Chemistry:
The presence of the hydroxyl group and the double bonds in Linalool's structure makes it reactive and useful as a chemical intermediate. It can be easily esterified to form compounds like linalyl acetate, another important fragrance ingredient. Its oxidation leads to citral, which is a precursor for other aroma chemicals and vitamins. This chemical versatility is what makes Linalool valuable not only for its scent but also for its role in synthesis, such as in the production of Vitamin E.

Sourcing High-Quality Linalool:
When you buy Linalool, understanding its chemical makeup is crucial for selecting the right grade for your application. As a leading supplier, we ensure that our Linalool (CAS 78-70-6) meets high standards of purity and consistency. Whether you need it for its aromatic qualities in fine fragrances, its flavor profile in food products, or as a key intermediate in pharmaceutical synthesis, our high-quality Linalool is sourced and produced with chemical integrity in mind. Partner with us for your Linalool needs and leverage its versatile chemistry.