HI7007-023 is a high quality pH 7.01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on the label and are air tight with a tamper-proof seal to ensure the quality of the solution. Hanna\’s line of technical calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened bottle. Supplied with Certificate of AnalysisAccuracy of +/- 0.02 pH @ 25CTemperature chart of the actual pH value at various temperatures printed on each bottle HI7007-023 is a high quality pH 7.01 calibration buffer produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with certified thermometers. Reported values are accurate to +/- 0.02 pH @ 25C and are traceable to NIST Standard Reference Materials (SRMs). The HI7007-023 is supplied with Certificate of AnalysisProduct codeLot numberMean lot valueSRMs that were usedManufacturing dateExpiration dateColor coded label for easy pH buffer value identificationEasy to identify different buffer valuesSolution does not contain any dyes that may stain the reference cell of a pH electrode