positive colloids ( ferric hydroxide , calcium oxalate , casein chloride-the latter at ph 4.0 ) are practically not affected by nacl , are rendered slightly negative by high concentrations of na ( 2 ) so ( 4 ) , and are rendered more negative by na ( 4 ) fe ( cn ) ( 6 ) and acid dyes .
C0008203
chloride
C0037494
nacl