Stable 3,3'-dichlorobenzidine dihydrochloride suspension

Details Stable 3,3'-dichlorobenzidine dihydrochloride suspension Stable 3,3'-dichlorobenzidine dihydrochloride suspension

C - Chemistry, Metallurgy

09

B

C09B 33/06 (2006.01) C07C 209/90 (2006.01)

Patent

CA 2102749

Abstract: Stable 3,3'-dichlorobenzidine dihydrochloride suspenion By means of a 3,3'-dichlorobenzidine dihydrochloride suspension in hydrochloric acid, comprising the components a) 35 to 63.5% by weight of 3,3'-dichlorobenzidine dihydrochloride; b) 11 to 24% by weight of hydrogen chloride; c) and 25 to 55% by weight of water, in each case relative to the total weight of the suspen- sion (100% by weight) and with the proviso that the components a), b) and c) together make 100% by weight; and whose viscosity is in the range from 80 to 1400 mPa?s, 3,3'-dichlorobenzidine dihydrochloride can be stably suspended in hydrochloric acid at high concentration and consequently low water content and at the same lime a suspension having low viscosity can be obtained, so that the slurry flows out of containers without problems oven after rotatively long static storage.

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