♦Pharmaceutical Field
O-cresol has a certain bactericidal and disinfecting effect and can be used as a raw material to synthesize a variety of drug intermediates. For example, it can participate in the preparation of antibiotics, antipyretic analgesics, etc., and serves as a key structural unit in the drug synthesis process. At the same time, its derivatives are also used in local disinfectants. After being modified by specific chemical reactions, they can enhance the antibacterial activity of drugs or improve pharmacological properties, providing important basic raw material support for pharmaceutical research and development and production.

♦Pesticide Field
In pesticide production, o-cresol is an important intermediate for the synthesis of a variety of high-efficiency pesticides. Using it as a starting material, herbicides, insecticides, etc. can be prepared. For example, it participates in the synthesis of certain phenolic herbicides and achieves a weed control effect by interfering with the physiological metabolism of plants. In addition, the phenolic hydroxyl group in its structure can be combined with other functional groups to form pesticide molecules with specific biological activity, which meets the pest and disease control needs of different crops and plays a key role in the plant protection link in agricultural production.

♦Spice Field
O-cresol itself has a special phenolic aroma and can be used to prepare spices after processing. In edible flavors and daily chemical flavors, its derivatives can be used as fixatives or blending agents to add unique aroma layers to flavors. For example, some o-cresol ester compounds have mild floral or fruity aromas and are often used in the fragrance blending of cosmetics, detergents and food additives. By controlling its dosage and matching with other spices, different aroma effects can be achieved to enhance the sensory experience of the product.

♦Dye Field
O-cresol can be used as a dye intermediate for the synthesis of a variety of azo dyes, anthraquinone dyes, etc. In the molecular structure of dyes, the introduction of o-cresol can affect the color, fastness and solubility of the dye. For example, by coupling reaction with diazonium salts, acid dyes or direct dyes for textile fiber dyeing can be prepared, which can make the fabric present bright and lasting colors, and have important application value in the textile printing and dyeing industry.

♦Plastics and Resin Fields
O-cresol can participate in the synthesis of phenolic resins and improve the performance of resins as a modified monomer. For example, adding o-cresol to phenolic resin can adjust the curing speed, heat resistance and mechanical strength of the resin, making it more suitable for making high-temperature resistant plastic parts, insulating materials or adhesives. In addition, its derivatives can also be used as functional additives in the synthesis of certain engineering plastics to improve the chemical corrosion resistance and processing performance of plastics, and are widely used in electronics, automobiles and other industrial fields.

♦Other Industrial Fields
In petrochemicals, o-cresol can be used as an antioxidant for lubricating oils to inhibit the oxidation and deterioration of oils during use and extend the service life of lubricating oils; in organic synthesis, it can also be used as a solvent or catalyst carrier to participate in the production process of some fine chemical products. At the same time, some metal salts of o-cresol can be used as catalysts in organic synthesis reactions to improve reaction efficiency by reducing the activation energy of the reaction, and play a role in the catalytic system of chemical production.