... rhombus crystal or grain.Ammonium formate GR SpecificationItemQualificationItemQualificationPurity ,%≥99.8Potassium (K),%≤0.001pH(50g/L,25°C)6.0~7.0Calcium ... Pb), %≤0.0005Nitrate (NO3),%≤0.002Package:500gAR SpecificationItemQualificationItemQualificationPurity ,%≥99.5Potassium (K),%≤0.002pH(50g/L,25°C)6.0~7.0Calcium ...