Oakton WD-00654-00 pH Buffer Reference Standard Solution for Calibration, pH 4.01 ± 0.01, 500mL

The Oakton Economical one-pine buffer solution bottles are freshness dated – and standardized against NIST-certified references to ensure quality. Bottles are labeled with the name and CAS number for all ingredients (for ‘Right-to-Know’ requirements). The high- accuracy solutions are ideal for pH meters with 0.001 resolution. Store buffers away from direct sunlight. Sold in individual bottles; 500-mL bottles are also available in cases of 12 – 4-L bottles in cases of four.