A solution of bichromate of potassa intensifies the color ; but an excess of this salt is apt to impart a reddish hue. The best aniline for black is the one which contains a mixture of aniline and ...

Aniline is a toxic substance that is used in ... Images show the Sarandi River's water with an intense color red flowing into an estuary, the Rio de la Plata. Fernando Cervantes Jr. is a trending ...