Silver Nitrate → HCID 178418580, compound

Participants

Reaction Conditions

Reaction Steps

6.5 g of benzotriazole and 10 g of gelatin were dissolved in 1,000 ml of water and the solution was stirred while maintaining the temperature at 50° C. A solution containing 8.5 g of silver nitrate dissolved in 10 ml of water was added to the above described solution for a period of 2 minutes and thus silver benzotriazole was formed. Then a solution containing 1.19 g of potassium bromide and 0.083 g of potassium iodide dissolved in 50 ml of water was added to the above described mixture for a period of 5 minutes. It is believed that on this step silver was supplied from the silver benzotriazole to form crystals of silver iodobromide (iodide: 20 mol%) adjacent to the silver benzotriazole. By controlling a pH of the emulsion thus prepared precipitation was caused and the undesirable salts were removed. The pH of the emulsion was adjusted to 6.0 and 400 g of the emulsion was obtained.

Provenance & Evidence