Hydrion Buffer Capsules are perfect for quick and easy pH meter calibration. When mixed with distilled or de-ionized water, a Hydrion Buffer Capsule will accurately produce 100 ml.of solution at pH 4.00. Hydrion Buffers are free flowing soluble powders that prepare clear or color safe solutions in minutes. A built-in preservative ensures long-lasting solutions ""color-keyed"" to easily identify the ph value of the buffer solution.

Specifications:

• Storage And Shelf Life: When stored at room temperature in clean airtight bottles, prepared solutions will last for three weeks. When added to the solution, Hydrion Buffer Preservative will protect prepared solutions for up to three months.
• Unprepared, packaged Hydrion Buffer Salts have a shelf life of five years.
• All HYDRION BUFFER SALTS ARE DIRECTLY TRACEABLE TO NIST STANDARDS AND CERTIFIED TO ± 0.02 pH UNITS AT 25°C

Directions:

Empty the contents of a Hydrion pH Buffer Capsule into 100 ml. of de-ionized or distilled water.