Sodium Thiosulfate, Concentration 0.5 N (0.5 M), CAS Number 10102-17-7, 497-19-8, 7732-18-5, Chemical Formula Na2S2O3, Chemical Container Material Plastic, Chemical Container Type Box, Chemical Grade Lab, Chemical Container Size 20 L, Chemical Family Type Solution, Standard, Calibration Certificate NIST, Shelf Life 24 mo, Standards Traceable to NIST