Hamilton, 238317, CRM DuraCal Buffer pH 4.01 Red, 250 mL

Hamilton pH calibration solutions offer stability of up to five years before buffer expiration. High buffering capacity provides rapid and stable calibration with accuracy up to +/- 0.01pH. Buffer solutions are tested against primary reference material from NIST and PTB. Each batch is also verified at an independent laboratory to ensure buffer solution accuracy. DuraCal Buffer pH are patented pH calibration solutions available in a wide range of independently verified pH values (pH 1.68 - pH 12).