HI5004-R is a premium quality pH 4.01 technical calibration buffer made from high purity salts and deionized water for analytical use according to ISO 3696/BS3978, using balances checked with certified weight and Class A glassware, in a temperature controlled environment checked with certified thermometers. Reported values are accurate to +/- 0.01 pH @ 25^°C and are traceable to NIST Standard Reference Materials (SRMs).

The HI5004-R is supplied with Certificate of Analysis

• Product code

• Lot number

• Mean lot value

• SRMs that were used

• Manufacturing date

• Expiration date

Color coded label and dyed solution for easy pH buffer value identification

• Easy to identify different buffer values