## Description - Certified Reference Material (CRM) solutions - Meets all test requirements for federal, state and local agencies - 100% compatible with all makes of pH instruments and electrodes - Long term buffer stability and buffer resistance to temperature changes during pH meter calibration - Manufactured to IUPAC (International Union of Pure and Applied Chemistry) formulation - Triple-layered proprietary packaging (aluminum, foil, PET and low-density polyethylene bag) prevents contamination by permeable gases - Supplied with individual temperature chart, traceability information and Traceable™ Certificate ## Chemical Identifiers ||| | ------------ | ------------ | |Additional Information|Accuracy of pH: ±0.010 at 25°C| ## Specifications ||| | ------------ | ------------ | |Shelf Life|2 years| |NIST Traceable|Certified and Traceable| |Physical State|Liquid| |Color|Red| |Chemical Name or Material|Buffer Standards pH 4.005(CRM)| |Additional Information|Accuracy of pH: ±0.010 at 25°C| |Packaging|473mL (16 oz.) bottle (ea)| |pH|4.005| |Quantity|473mL (16 oz.)|