Hanna, HI77400C, pH 4.01 and 7.01 Calibration Buffer Sachets w/ COA (10 x 20mL, 5 Each)

HI77400C is a set of premium quality pH 4.01 and 7.01 calibration buffer solutions that is NIST traceable and supplied with a Certificate of Analysis. Each sachet has the lot number and expiration date stamped on it and is made of light block foil ensuring freshness each time one is opened. Hanna's line of calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened sachet. The HI77400C is for 5 sachets of pH 4.01 and 5 sachets of pH 7.01 with each containing 20 mL of buffer.
Supplied with Certificate of Analysis
Accuracy of +/- 0.01 pH @ 25°C
Temperature chart of the actual pH value at various temperatures printed on each sachet packet