FOLLOWING ARE THE MAIN SPECIFICATION OF BLACK IRON OXIDE :-
APPEARANCE: BLACK POWDER
FERRIC CONTENT: 50% ~ 95%
MOISTURE: 1.0%
WATER-SOLUBLE MATTER: 0.5%
PH VALUE: 5-8
OIL ABSORPTION: 15-25
TINTING STRENGTH: 95-105%
DENSITY APPROX: 4.5-5.5
MESH : 325#.
CHEMICAL / PHYSICAL ATTRIBUTES DIFFER BY GRADES/ USES/REQUIREMENT.
IMPORTANT FEATURES & QUALITY:
BLACK POWDER, ADDITION COMPOUND OF FERROUS OXIDE AND FERRIC OXIDE, WITH MAGNETISM, HIGH TINCTORIAL STRENGTH AND COVERING POWER, GOOD RESISTANCE TO LIGHT AND ATMOSPHERE,
GOOD LIGHT-FASTNESS, AND NO IMPERMEABILITY OR OIL RESIDUE. IT IS VERY STABLE IN GENERAL ORGANIC SOLVENTS, NOT RESISTANT TO ACID, SOLUBLE IN HOT STRONG ACID. GOOD ALKALI RESISTANCE.
IT'S INORGANIC PRODUCTS OF A KIND USED AS LUMINOPHORES.

USES:
ANTIRUST PAINTS, PRIMERS, WATERCOLORS AND GREASEPAINTS, FOR COLORING FOR MAN-MADE MARBLES, CEMENT FLOORS AND GROUND TILES AS WELL AS CATHODE PLATES OF ALKALINE BATTERIES, CEMENT COLOURS, CEMENT TILES, TERRAZZO AND MOSAICS