Molecular Formula | C8H10Cl2O2 |
Physical and Chemical Properties | Chemical quality This product is prismatic crystal, m.p.95 ~ 96.5 ℃, insoluble in water, soluble in organic solvents such as alcohol, benzene, toluene, chloroform, etc. |
Use | Use (±) trans-dichloropolyamic acid is an intermediate for the preparation of cypermethrin. |
Raw Materials | Permethric acid cis-DL-3-(2,2-Dichlorovinyl)-2,2-dimethylcyclopropanecarboxylic acid |
Downstream Products | cis-DL-3-(2,2-Dichlorovinyl)-2,2-dimethylcyclopropanecarboxylic acid |
The preparation method is to add (±) cis-trans dichlorochrysanthemum acid in the reaction kettle, add sodium hydroxide solution, adjust the pH value to a certain value, and then pass carbon dioxide in the solution,(±) cis-dichlorochrysanthemum acid is precipitated, filtered and removed, acidified with hydrochloric acid in the solution to obtain crystallization, filtered, and recrystallized as (±) trans-dichlorochr.
chemical properties | this product is a prismatic crystal, m.p.95 ~ 96.5 ℃, insoluble in water, soluble in organic solvents such as alcohol, benzene, toluene, chloroform, etc. |
Use | (±) Trans dichlorochrysanthemum acid is an intermediate for the preparation of trans-cypermethrin. |
production method | its preparation method is to add (±) cis-trans dichlorochrysanthemum acid in the reaction kettle, add sodium hydroxide solution, adjust the pH value to a certain value, then pass carbon dioxide in the solution,(±) cis dichlorochrysanthemum acid is precipitated, filtered and removed, crystallized with hydrochloric acid in the solution, filtered, recrystallization is (±) trans dichlorochrysanthemum acid. |