Total zinc amount( base on zinc sulfate) （m/m）28% min
Zinc oxide(m/m)： 0.6% max
105℃ volatile(m/m): 0.3% max
After Soluble in water% (m/m): 0.4% max
Residue on sieve (63um sieve pore) (m/m):0.1% max
Oil absorption, g/100g :14 max
Reducing power ( compare with standard sample): 105% min