... ,2,3-Benzotriazole 99.8%, --metal's slow corrosion water treatment chemical 2) low poison, LD50 for small mouse is 965mg ... be big flake, column, fine granular, powder. Properties:It's bitter, odorless, boiling point is 204°C(15mmHG),soluble in alcohol ... ,2,3-Benzotriazole 99.8%, --metal's slow corrosion water treatment chemical