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Hydrion pH Chemvelopes are packaged in triple protection foil, polyethylene, and paper. This keeps the enclosed buffer dry and free flowing. The envelope is clearly marked with the correct pH value. The contents of the chemvelope, when dissolved in 500mLs of distilled water, makes a precise buffer solution. Packaged five envelopes to the box, and supplied with one dispenser vial of Hydrion color key buffer.
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