Conduct environmental and wastewater monitoring with the Thermo Scientific™ Orion™ AQUAfast COD165 Thermoreactor with five preset work temperatures and four preset run times. Pricing and Availability. COD Standard, 1000ppm (1mL = 1mg COD) (Potassium Acid Phthalate in Water), Certified, 0.300mg/mL ±0.003, LabChem™.