pH 7 is the most frequently used pH buffer. Hanna solution sachets include a pH Vs. Temperature chart together with the production lot# and Expiration date to guarantee maximum accuracy.

Hanna pH buffers are made of Potassium Di-hydrogen Phosphate and Di-sodium Hydrogen Phosphate and are standardized with a pH meter that is calibrated to NIST primary standard buffer solutions (NIST 186Ie & 186IIe and NIST 158g S.R.M.).

pH Value at 77°F (25°C):	7.01
Size:	20 mL
Quantity per Package:	10

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