1N (0.O.(SULFURIC ACID)/UN3264 Ferrous Ammonium Sulfate 0.1M), APHA 5220 B, C, D, Chemical Container Material Amber Glass, Chemical Container Type Bottle, Chemical Grade Lab, Chemical Container Size 4 L, Chemical Family Type Standards and Solutions, Calibration Certificate NIST, Shelf Life 12 mo, Shipping Restrictions DOT - CORROSIVE LIQUID, ACIDIC, INORGANIC, N.