55.1 lbs (25kg) Gold Free Granular Assay Litharge

Description

Contact Legend Inc for more information regarding International Orders

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)