Chlorophosphonazo Indicator Solution, 500 mL

For the determination of Ultra Low Range Hardness, 4-1000 µg/l CaCO3.
For ultra low range hardness determination by the Chlorophosphonazo method. Hach Method 8374. Range: 4 - 1000 ug/L Ca & Mg as CaCO3. Ideal for use with Hach's Pour-Thru Cell. Requires CDTA Reagent, Cat. No. 2589636. 500 mL bottle