CAS No. 1309-37-1
Other Names Iron Oxide Red
EINECS No. 215-168-2
Appearance red power
Usage Cement color tile, paint, coating, ink, ceramics, rubber, plastics, le
Model Number 110 120 130 190
Iron Oxide Red Inorganic Pigment .
Color is steel or silver gray to black in some forms and red to brown in earthy forms. Sometimes tarnished with irredescent colors when in a hydrated form (called Turgite).
Luster is metallic or dull in earthy and oolitic forms.
Transparency: Crystals are opaque.
Crystal System is trigonal; bar 3 2/m
Crystal Habits include tabular crystals of varying thickness sometimes twinned, micaceous (specular), botryoidal and massive. also earthy or oolitic.
Cleavage is absent however there is a parting on two planes.
Fracture is uneven.
Hardness is 5 - 6
Specific Gravity is 5.3 (slightly above average for metallic minerals)
Streak is blood red to brownish red for earthy forms.
Purity(fe2o3):80.0% min
Moisture:0.30%max
Water soluble salt:0.50%max
Residue(45um):0.3%max
Tinting strength:95-105%
Ph of aqueous extract: 6.5-8.5
Volatiles at 105ípc:1.0%max .
