... Iron drums.Item Specification ItemSphericalAcicularPurity,%≥99.5(A)≥99.3(B)≥99.5Chloride(based on NH4Cl ),%≤0.15≤0.15chlorate ... ,%≤0.25≤0.25PH4.3~5.84.3~5.8Heat stability(177±2°C)h≥3≥3Sodium lauryl sulfate≤0.020NoneTotal ... moisture ,%≤0.20(A)≤0.15(B,C)None Particle( ... spherical)A, 40-60Mu(aperture 450-280um)B, 60-80 Mu(aperture 280-180um)C,100-140 ...