Chemical Raw materials and Intermediates

1,3,5一Trimethyl Benzene
1,3,5－Trimethyl Benzene
C₉H₁₂

Physical chemical properties: Colorless transparent liquid.Melting point: α-type -45℃；β-type 51℃. Boiling point 164.7℃. Relative density( d₄²⁰ )0.864. Refractive index ( n_d²¹ )1.4994. Flash point 44℃. Self-combustion point 550℃. Insoluble in water, soluble in ethanol. Soluble in benzene, aether,acetone with any ratio.


　　 　　 　 　　　　 　　　 　Typical Data
Index 　　　　　　　　　　　　　　　　　　　　　　　Test Method
Purity, m/m%　　　　　　　　　　　≥98　　　　　product standard Q/SHJL0207-2002 appendix A
Pseudocumene content, m/m%　　 ≤1.0
Density ( d₄²⁰ ) 　　　　　　　Actual Measument GB/T1884-92

Product Applications: 

It is a raw material for organic synthesis. It is used to make 1,3,5-Benzene Tricarboxylic Acid, antioxidant, ethoxyline resin solidifying agent, polyester resin stabilizer, and alkide resin plasticizer. It is used to produce 2,4,6-trimethyl benzene for making such dyes as active cobalt blue and K-3R.

Manufacture method: Distill heavy aromatic hydrocarbons to obtain pseudocumene. At the same time, isomerize highly pure 1,2,4－Trimethyl Benzene to 1,3,5－trimethyl benzene. Then fraction distillation is performed to isolate1,3,5－trimethyl benzene from the reaction oil.

Toxicity and protection: Its toxicity is similar to dimethylbenzene.It irritates the nose and the throat. The highest permitted concentration in air is 125mg/m³. The operation spot should be well ventilated and the operators should wear protection masks.

Packaging, storage and transportation: Fire and insolation should be avoided during storage. It should be separated from oxidants. It should be handled with care to avoid breaking the package. Securely sealed iron barrel no thinner than 1.2mm should be used to pack the product and each barrel should not exceed 200kg. If it is packed into plastic barrels or glass bottles, securely seal the containers before put them into wood cases, which should be securely lined inside with inflammable materials and tightly tied outside with iron wires or iron sheets. Each case should not exceed 50kg and be marked with "flammable".