All Hanna solution bottles come with a pH Vs. temperature chart together with the production lot # and expiration date to guarantee maximum accuracy.

Formulation Hanna pH buffers are made of potassium dihydrogen phosphate and disodium hydrogen phosphate and are standardized with a pH meter calibrated to NIST primary standard buffer solutions (NIST 186Ie & 186IIe and NIST 158g S.R.M.).

1413mS/cm Sol. 230mL

SKU: HI7031M
$16.99Price
Excluding Sales Tax