GroLine pH 4.01 Buffer Sachets, 20 mL (25 pcs.)

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^°C and are traceable to NIST Standard Reference Materials (SRMs).

Each sealed sachet holds just the right amount of solution making every sachet as fresh as the day it was packaged!

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

Light block foil packaging

• Light-tight packet helps to prevent against degradation by UV light.

One-time use sachet packets

• Ensures quality and freshness of solution.

Each sachet marked with lot number and expiration date

• Many Hanna solutions are specially formulated to have an expiration of 5 years from manufacture for an unopened sachet.

The HI70004G is supplied with Certificate of Analysis

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