pH 4 and pH 7 Calibration Solutions
Product Number: SB28993
In Stock (Ships within 1-2 business days)
This buffer solution is made from an established formula and is standardized with a pH meter that is calibrated to NBS/NIST primary standard buffer solutions. The 20 ml sachets are ideal for infrequent calibrations. The pH values at 25° C are 4.01 and 7.01, package of 10 sachets (five each for 4.01 pH and 7.01 pH).