Overview
o-Cymene, or ortho-cymene, is an organic compound belonging to the class of aromatic hydrocarbons. It is one of the three structural isomers of cymene, alongside m-cymene and p-cymene. The compound is characterized by its aromatic ring structure with a methyl and isopropyl group attached at the ortho position. o-Cymene is naturally found in some essential oils but is primarily produced synthetically for industrial use. Its applications span across various industries, including pharmaceuticals, fragrances, and chemical manufacturing. As a solvent, it is valued for its ability to dissolve a wide range of organic compounds. Its role as an intermediate in chemical synthesis further underscores its importance in industrial chemistry.
Physical and Chemical Properties
o-Cymene is a colorless to pale yellow liquid with a distinct aromatic odor. It has a molecular weight of 134.22 g/mol and a density of 0.876 g/cm³ at 20°C. The compound is highly volatile and flammable, with a boiling point ranging between 178-180°C and a melting point of -73.5°C. Chemically, o-cymene is insoluble in water but readily dissolves in common organic solvents such as ethanol, ether, and benzene. Its aromatic structure makes it relatively stable under normal conditions, though it can undergo reactions typical of alkylbenzenes, such as halogenation and sulfonation. These properties make it a versatile component in various chemical processes.
Main Applications
o-Cymene is widely used as a solvent in the production of resins, paints, and coatings. Its ability to dissolve a variety of organic compounds makes it a preferred choice in formulations requiring high solvency power. Additionally, it serves as an intermediate in the synthesis of more complex chemicals, including pharmaceuticals and agrochemicals. In the fragrance industry, o-cymene is utilized as a component in perfumes and essential oils due to its pleasant aromatic scent. Its role in these applications highlights its versatility and importance across multiple sectors. The compound's stability and reactivity also make it valuable in research and development within the chemical industry.
Safety and Storage
Due to its flammable nature, o-cymene must be stored in a cool, dry, and well-ventilated area away from ignition sources. Proper handling procedures, including the use of personal protective equipment (PPE) such as gloves and goggles, are essential to prevent skin and eye irritation. In case of spills, absorb the material with an inert substance and dispose of it according to local regulations. Avoid inhalation of vapors by working in a fume hood or with adequate ventilation. Safety data sheets (SDS) should always be consulted before handling to ensure compliance with health and safety guidelines.
B2B Procurement Guide
When procuring o-cymene, B2B buyers should prioritize suppliers who adhere to stringent quality and safety standards. Verification of the CAS number (527-84-4) is crucial to ensure the correct compound is being purchased. Buyers should also consider the compound's purity, typically ranging from 95% to 99%, depending on the application requirements. Pricing can vary based on quantity, purity, and supplier location. Bulk purchases often attract discounts, so buyers should negotiate terms based on their volume needs. Additionally, ensure that the supplier provides proper documentation, including certificates of analysis (CoA) and safety data sheets (SDS), to guarantee product quality and compliance.
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