Sl. No.
Characteristics
Lead Suboxide Grey-Oxide
Red Lead Jointing
Red Lead Setting
Red Lead Non -Setting
Litharge Chemical Grade
Litharge Battery Grade
1.
Form & Colour
Grey to Greenish Grey Powder
Orange Red Powder
Orange Red To Brick Red Powder
Brilliant Orange Red to Brick Red Powder
Canary Yellow Powder
Canary Yellow with slight reddish tinge powder
2.
Crystal Structure
Tetragonal
Spinel Structure
Orthorhombic
Orthorhombic + Tetragonal
3.
Thermal Stability
-
500oC
250oC / 897 oC
4.
Specific Gravity
9.1
9.5 to 9.9
5.
Retention on 240 mesh BS Sieve (63 Micron IS Sieve) % Max
0.1
0.25
0.15
6.
Apparent Density (Scott) gms/cc
1.4 to 16
1.2 to 1.6
1.3 to 1.6
1.2 to 1.3
1.8 to 2.2
7.
Subsidence in Petrol / Water ml/gm
0.40 to 0.45
0.38 to 0.45
0.43 to 0.45
0.40 to 0..42
0.40 to 0.42
8.
Water Absorption mg/gm
110 to 120
80 to 100
100 to 110
90 to 100
9.
Acid Absorption mg/gm
160 to 200
150 to 160
130 to 150
10.
Oil Absorption %
6-7
7-8
11
Volatile Matter % Max
0.10
0.01
0.003
12
Matter Soluble in Water % Max by weight
Nil
13.
Insoluble Matter in Acetic Acid % Max
0.08
14.
Free Lead % Max
25 to 40
Traces
0.05
15.
PbO2 %
18 to 27
30 to 33.1
Minm 95
0.002 Max
0.011 Max
16.
Pb3O4 %
51.6 to 77.4
86 o 95
0.007 Max
0.03 Max
17.
Moisture Content % Max
0.06
18.
Chemical
Pb1.37 to 1.73
Pb3O4
PbO