4.01 pH Buffer Solution, (25x 20 mL)
HANNA®' buffer solutions are prepared according to precise formulas and are standardized with a pH meter calibrated according to the NIST standards.
The 20 mL sachets are single-dose whereas.
All pH 4 solutions show batch number, expiration date and the correlation table between pH and temperature.
Order Information: 25 count, 20 mL sachets