Description CAS#: 7803-57-8 | Formula: H2NNH2.H2O | Specifications: Assay (RP-Titration) (%) 99.0 - 102.5 %, Color (APHA) 15 Max, Heavy metals 0.001 % Max, Iron 0.001 % Max, Residue after evaporation 0.05 % Max, Sulfate 0.01 % Max