... )34.0-40.0(Ca)49.5-54.5(As CaO)As, ppm20 max.50 max.3 max.1 max.F ... acid, melting point 1670, stable in air.UsageUsed for livestock, poultry feed additives, treatment of certain diseases of poultry, animals.PackageLined with plastic bags, jackets composite plastic ... free to contact me for best offer. we will supply you with the most competitive price and best quality. best regards. tricalcium phosphate