| Potassium permanganate | 1/4 ounce |
| Caustic soda | 1/2 ounce |
| Water | 2 pints |
Agitate the mixture frequently during several hours; then separate the benzine and wash it thoroughly with water. On agitating the benzine with the acid permanganate solution an emulsion-like mixture is produced, which separates in a few seconds, the permanganate slowly subsiding and showing considerable reduction. In the above process it is quite probable that the time specified (24 hours) is greatly in excess of what is necessary, as the reduction takes place almost entirely in a very short time. It has also been suggested that if the process were adopted on a manufacturing scale, with mechanical agitation, the time could be reduced to an hour or two.
KEROSENE-CLEANING COMPOUNDS: See Cleaning Preparations, under Miscellaneous Methods.
KEROSENE EMULSIONS: See Petroleum.
KETCHUP (ADULTERATED), TESTS FOR: See Foods.
KHAKI COLORS: See Dyes.
KID: See Leather.
KISSINGEN SALTS: See Salts (Effervescent).
KISSINGEN WATER: See Waters.
KNIFE-SHARPENING PASTES: See Razor Pastes.