250 mL

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  Phenolphthalein Indicator, 1% (w/v) in Isopropanol

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  Sulfuric Acid, 1.00 Normal (N/1)

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  Total Dissolved Solids (TDS) Standard, 10,000 ppm; NaCl-based

  $20.00 – $28.00Price range: $20.00 through $28.00 Select options This product has multiple variants. The options may be chosen on the product page
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  Total Dissolved Solids (TDS) Standard, 18,000 ppm; NaCl-based

  $18.00 – $28.00Price range: $18.00 through $28.00 Select options This product has multiple variants. The options may be chosen on the product page