Calibration Solutions at Hanna have been specially formulated to have an expiry date of 5 years from manufacture for an unopened sachet. The HI-50036P is for 25 sachets containing 20 mL of calibration solution. It is produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionised water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with certified thermometers.

Features
Quick Calibration Solution
Calibration solution for Gro line pH and EC/TDS meters
pH calibration buffer value of pH 6.86
EC calibration standard value of 5,000 μS/cm (5.00 mS/cm)
Convenience of individual packaging
Ideal for users that do not calibrate frequently
Ideal for field use due to portability
Every sachet is as fresh as the day it was packaged
Light block packaging
Prevents any oxidation from UV light which could alter the pH buffer value