Nitrate Standard – as Nitrogen Preserved with Chloroform, Concentration 1000 ppm, CAS Number 67-66-3, 7732-18-5, 7757-79-1, APHA 4500-NO3 E, Chemical Container Material Plastic, Chemical Container Type Bottle, Chemical Grade Lab, Chemical Container Size 125 mL, Chemical Family Type Solution, Standard, Calibration Certificate NIST, Shelf Life 24 mo, Shipping Restrictions Chemical Not Regulated For Transport, Standards APHA 4500-NO3� E, ASTM D3867-09 A,B, Traceable to NIST