Parameter

Index

High Grade

First Grade

ZnO

99.7% min

99.5% min

Pb

0.037% max

0.05% max

Mn

1ppm max

1ppm max

Cu

2ppm max

4ppm max

HCl Insoluble

0.006% max

0.008% max

Loss of Ignition

0.2% max

0.2% max

Residue On 45um sieve

0.1% max

0.15% max

Water Soluble

0.1% max

0.1% max

Volatile at 105 Degree

0.3% max

0.4% max