APA6000 and EZ4003/EZ4004 Alkalinity Standard, 500 mg/L, 1 L
APA6000 and EZ4003/EZ4004 Alkalinity Standard, 500 mg/L, 1 L
www.hach.com
I have 2 IL bottles of 500 ppm alkalinity standards. One bottle is completely unopened. The other has about 300 mL removed.
You can dilute these down and use them to test your alkalinity equipment.
35 Shipped for the unopened, 25 shipped for the opened.