**o-Toluic Acid (2-Methylbenzoic Acid)**
Also known as o-toluylic acid, 2-methylbenzoic acid is a white crystalline solid commonly used in organic synthesis and chemical research. It has the CAS number **118-90-1** and a molecular formula of **C₈H₈O₂**, with a molecular weight of **136.15 g/mol**. The product is available in analytical reagent (AR) grade, with a purity of **≥99.0%**.
The melting point of o-toluic acid ranges from **102 to 106°C**, and it can sublime when heated with water vapor. It is soluble in ethanol and chloroform, and moderately soluble in boiling water, but only slightly soluble in cold water. Its relative density is **1.0621**, and it boils at **258–260°C**. The refractive index at 114.6°C (nâ‚â‚â‚„.₆D) is **1.512**, and its flash point is **148°C**.
This compound is considered **moderately toxic**, with an oral LDâ‚…â‚€ of **400 mg/kg** in rats. It is widely used in biochemical research, organic synthesis, dye production, and as a bacteriostatic agent. Additionally, o-methylbenzoic acid serves as a key intermediate in the preparation of various fine chemicals, such as the initiator **MBPO**, the fungicide **phosphoramide**, perfumes, and photographic films.
Its versatility and stability make it a valuable component in both industrial and laboratory settings. Proper handling and storage are recommended due to its moderate toxicity.
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