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Simply dissolve the contents of a Chemvelope in 500 mL of distilled water to make a precise buffer solution.
Simply dissolve the contents of a Chemvelope in 500 mL of distilled water to make a precise buffer solution. Carton of 5 envelopes includes 1 vial of preservative solution. Powders keep 5 years; prepared solutions keep 3 weeks (or 3 months with preservative added). Preservative contains a pH indicator and colors each buffer solution for easy identification.