HI7080L is a 500 mL bottle of premium quality 2.3 g/L sodium standard solution for ISEs. Hanna standard solutions have the lot number and expiration date clearly marked on the label and are air tight with a tamper-proof seal to ensure the quality of the solution. Hanna's line of standard solutions have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened bottle.

• 2.3 g/L sodium standard
• Air tight bottle with tamper-proof seal to ensure quality
• Lot number and expiration date printed on each label