pH 4.0 Standard @ 25°C Back Catalog number: 59468 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MI504-100 Reagent kit for 100 tests (Free & total chlorine) Contains: 1 x 20 mL DPD1, 1 x 20mL DPD2, 1 x 20mL DPD3 Price on request 52043 Calibration Standard Mix 1 Price on request 674962 Propisochlor, 10.0 µg/ml, Cyclohexane, 10ml Price on request