DPD 1A + DPD 1B Liquid Reagents – for Testing Free Chlorine (250 Tests)

DPD 1A + DPD 1B Liquid Reagents – for Testing Free Chlorine (250 Tests) are photometer-compatible replacement / refill consumable liquid reagents used for accurate pool & spa testing.

Key Specs

• Product type: Replacement / refill reagent (consumable)
• Test parameter: Free chlorine
• Range: 0.0 - 4.0 mg/l (ppm)
• Format: Liquid reagent kit (250 tests)
• Shelf life: 6 months (from the date you receive it)

What this reagent does

Chlorine (in the form of sodium hypochlorite, calcium hypochlorite, chlorine gas, chlorinated isocyanurates,...) has become the leading disinfectant for swimming and bathing pool water worldwide. When measuring the chlorine concentration present in the water, a distinction is made between 3 partial values according to DIN EN 7393. 1 Free chlorine: Chlorine present as hypochlorous acid, hypochlorite ion or as dissolved elemental chlorine. 2. Combined chlorine: Proportion of total chlorine present in the form of chloramines and all chlorinated derivatives of organic nitrogen compounds. 3. Total chlorine: Sum of the former two forms.

Storage & shelf life

Store reagents cool, dry, and sealed. Avoid humidity and heat.

• Recommended storage temperature: 46°F
• Protect from: moisture/water and direct heat

Proper storage helps maintain accuracy and supports the stated shelf life.

Note: Product performance depends on correct testing procedure and proper reagent storage.