Features: 1) Specification: tech, 50SL 2) Appearance: buff powder, light yellow to light brown liquid, transparent liquid 3) Content: 98% (min.), 500g/L (min.), 0.0±5.0g/L 4) Loss on drying: 0.5% (max.) 5) Water: 0.1% (max.) 6) Acidity (as H2SO4): 0.5% (max.), 1.5% (max.)