Phosphate Buffer – pH 7.0 – for Chlorine, Chlorine Dioxide, Concentration pH 7, CAS Number 7558-79-4, 7732-18-5, 7778-77-0, APHA 4500-Cl D (20th Ed.), 4500-ClO2 C,E, Chemical Container Material Plastic, Chemical Container Type Bottle, Chemical Grade Lab, Chemical Container Size 1 L, Chemical Family Type Buffer, Calibration Certificate NIST, Shelf Life 24 mo, Shipping Restrictions Chemical Not Regulated For Transport, Standards APHA 4500-Cl D (20th Ed.), 4500-ClO2 C,E, ASTM D12, Traceable to NIST