HI7004-050 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℃ and are traceable to NIST Standard Reference Materials (SRMs). Solution does not contain any dyes that may stain the reference cell of a pH electrode.
The HI7004-050 Certificate of Analysis includes:
- Product code
- Lot number
- Mean lot value
- SRMs that were used
- Manufacturing date
- Expiration date
