55.1 lbs (25kg) Gold Free Granular Assay Litharge

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GOLD FREE Assay Litharge - Lead Oxide (PbO)
A yellow/orange granular assay litharge that is C.P. grade (chemically pure). This material is used for fire assaying processes for the quantitative determination of precious metals in an ore. It is the purest form of litharge, particularly low in silver, and is milled to a fine and uniform particle size for enhanced reactivity and consistency of reaction.
SPECIFICATION
Lead Monoxide (PbO) 99.95 % Minimum
MAXIMUM IMPURITY LEVELS
Gold (Au) 1.5 ppb Maximum
Iron (Fe) 0.002 % Maximum
Free Metallic Lead (Pb) 0.04 % Maximum
Red Oxide Lead (Pb3O4) 0.05 % Maximum
Other Trace Elements See ASTM Spec B29 for Corroding Grade Lead
Silver Approx. 2 ppm
SG (20oC) 9.53
Particle Size 14 mesh retained >60 %
Physical Properties
Color Yellow/Orange
Form Granular
Specific Gravity 9.5 g/cc
Apparent Density 23-33 g/cu.in
Molecular Weight 223.21
Refractive Index 2.67
Melting Point 1630°F. (888°C)
Legend, Inc. 988 Packer Way Sparks, NV 89431 Phone: 775-786-3003
Email: ss@lmine.com
www.lmine.com