The pH 4.01 Buffer Solution is manufactured and ready to use in accordance with and traceable to NIST publication 260-53 (PB 248-127) to ensure quality and accuracy. Label includes a table to display what the pH value should be given the buffer solution temperature.

Features
4.01 pH Buffer Solution (25°C)
16.9 fl oz (500ml) bottle with viewing strip and childproof cap
Color-coded red for easy identification
+/-0.020pH accuracy
Certificate of Analysis available upon request