... ,Reasonable particle size range distribution ensure the coat surface smooth.2,Low sulphate ,phosphorus and chlorine element ,make the weld ... 18--27Water unsolvable,%≤0.6Light transmittance,%qualifiedLead(pb),(mg/kg)≤4Arsenic (As),( mg/kg)≤2 To guarantee the function of the sodium alginate ... ,our sodium alginate are highpurity. The content is ≥99.2% . Picture for Reference Welding Grade Sodium Alginate