B.O.D. Bottle with Stopper, 125mL, Borosilicate Glass

This Eisco Labs 125mL Biological Oxygen Demand (B.O.D.) bottle is made from borosilicate 3.3 glass and includes an interchangeable glass penny-head stopper. The bottle measures 4.52" tall and 2" in diameter. B.O.D. bottles are specifically designed for biochemical oxygen demand testing of water samples. The penny-head stopper creates a water seal that prevents air exchange, ensuring accurate dissolved oxygen measurements. Suitable for environmental science, water quality testing, and chemistry laboratories.