M-Xylene

CAS: 108-38-3
Molecular Formula:C8H10 
Molecular Weight: 106.16
Product description:Colorless, flammable liquid. Between adjacent, the melting point of p-xylene, respectively is 25.2 ℃, 47.9 ℃ and 13.3 ℃, boiling point were 144.4 ℃, 139.1 ℃ and 138.3 ℃, the relative density were 0.8802, 0.8642 and 0.8611; Insoluble in water, and many organic solvents miscibility. When catalytic oxidation produce phthalic anhydride, terephthalic acid and isophthalic acid. Xylene is one of the important raw materials for chemical industry, natural exists in coal tar, and some oil, light oil of coal tar part or light catalytic reforming gasoline by fractional distillation. Industry mainly use product naphtha reforming of C8 fraction extraction. Also can be made of toluene in catalyst and under high temperature and high pressure, the disproportionation.Mainly used for preparing phthalic anhydride, it is to create a variety of dyes and indicator (e.g., phenolphthalein) an important raw material. O-xylene also can be used for the preparation of polyester resin, insects, ward off agent, plasticizer and dye, etc. Meta-xylene generated after nitration and reduction of 4, 6 - dimethyl - 1, 3 - phenylene diamine is synthetic dyes intermediates, meta-xylene can also be used as the raw material of synthetic perfume (such as musk xylene).