... granular to fine, crystalline powder, very soluble in water. Non corrosive, non toxic and readily biodegradable (98% after 2 days), sodium ... Pb ,ppm1 max Arsenic salt , ppm2 max Heavy metals,ppm10 max Specification Tech grade ItemIndustry gradestandard AppearanceWhite or yellowish ... Pb ,ppm2 max Arsenic salt , ppm2 max Heavy metals,ppm10 max PACKAGING25KG PP bag500KG/1000KG Super sacks STORAGE Keep ...