W1100S7 - Hanna Buffer Solution for pH Meter (pH Level 7.01)
W408-7010 - Hanna pH 10.01 Buffer Solution, 500 mL (pH Level 10.01)

Hanna's Buffer solutions are made from established formulas and are standardized with pH meters that are calibrated to NBS/NIST primary standard buffer solutions. Now the pH 4 buffers carry lot #, expiration date as well as pH/°F/°C chart on every bottle.

The ingredients of Hanna pH 4 buffers are Potassium Hydrogen Phthalate. They are standardized using a pH meter calibrated by primary standard buffer solutions (NIST 186 Ie, NIST 186 IIe and NIST 6.52 oz. (185g) S.R.M.). The pH value is certified traceable to NIST 6.52 oz. (185g) S.R.M.

If you cannot open the MSDS, Get Adobe Reader.