• Free and Total Chlorine
• Approved for reporting
• 30mL size contains 144 5mL tests. 60mL size contains 288 5mL tests
• DPD#1A and DPD#1B are added to a 5mL or 10mL sample to test for free chlorine. DPD#3 is then added to measure total chlorine
   
• DPD Colorimeter Grade Tablets
• DPD Rapid Dissolve Tablets
• Chlorine Index
• Reagents Index

• DPD 1A MSDS
• DPD 1B MSDS
• DPD 3 MSDS

• Combined Chlorine = Total Chlorine - Free Chlorine
• Use DPD1 to measure the free chlorine
• Add DPD3 to the same sample to measure the total chlorine
• LaMotte liquid reagents separate DPD1 into two components for stability
• Free chlorine testing requires one bottle of 1A and one bottle of 1B

PURCHASE LIQUID DPD REAGENTS