HI7023/1L is a premium quality TISAB calibration solution 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 traceable to NIST Standard Reference Materials (SRMs).

Air tight bottle with tamper-proof seal

• Ensures quality and freshness of solution

Each bottle marked with lot number and expiration date

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

• Certificate of Analysis available upon request