Info: Two 20 ml Sachets
To get the proper use of your expensive pH monitoring equipment, it is vitally important to recalibrate it periodically with a buffer and maintenance solution with a known pH level. These premium quality buffered solutions from Hanna Instruments solve that problem. They have a pH of 7.01 when the contents are at 25 Celsius, with accuracy of +/- 0.01 pH, and the packets come with a table indicating what the solution's pH would be at temperatures ranging from 0C to 85 (32 to 203F) (which vary accordingly, depending on the conditions you actually do the calibration test in).
Hanna's technical calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened sachet.
Ingredients:Aqueous Buffer Solution of Potassium di-hydrogen phosphate (7778-77-0) and di-Sodum hydrogen phosphate (7758-79-4)
Not to be taken internally. Keep out of reach of children. If you inhale the fumes, remove yourself from area to the fresh air. If it makes contact with your skin, wash the affected area with water and soap. If you get some in your eye, rinse out with plenty of water for at least 15 minutes. If pain persists, summon medical advice. If swallowed, wash out mouth with plenty of water, provided person is conscious; obtain medical attention if still feeling unwell.