Features

One-time use sachet packets ensures quality and freshness of solution

Light block foil packaging to prevent against UV light degradation

Each sachet marked with lot number and expiration date of 5 years from manufacture for an unopened sachet

Solution does not contain any dyes that may stain the reference cell of a pH electrode

The HI70004G Certificate of Analysis includes:

• Product code
• Lot number
• Mean lot value
• SRMs that were used
• Manufacturing date
• Expiration date

HI70004G 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).