Home pageProductsReference standards and chemicals in small quan...High Purity Standards (HPS)Water standardsDrinking water hardness quality control Drinking Water Hardness Standard. 500 mL. Contains: (mg/mL) Calcium at 30-90, Magnesium at 2-20. Calcium hardness as CaCO3 at 75-225 mg/L. Total hardness as CaCO3 at 83-307 mg/L. Concentrations vary depending on lot. 12 months expiry date. ISO 9001:2015 certified, ISO/IEC 17025:2017 and ISO 17034:20166 accredited. Ask question


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Product no.:WQC-HARD-DW-500
Manufacturer:High Purity Standards
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