Hanna, HI7004-023, GroLine pH 4.01 Calibration Buffer (230 mL)

HI7004-023 is a high quality pH 4.01 calibration buffer produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with certified thermometers. Reported values are accurate to +/- 0.02 pH @ 25 ° C and are traceable to NIST Standard Reference Materials (SRMs).
The HI7004-023 is supplied with Certificate of Analysis
Product code
Lot number
Mean lot value
SRMs that were used
Manufacturing date
Expiration date
Color coded label for easy pH buffer value identification
Easy to identify different buffer values
Solution does not contain any dyes that may stain the reference cell of a pH electrode