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Cole-Parmer Metrepak 272,PH4 pH Calibration Buffer Capsules, 4.0, orange, 10/vial
Supplier: Cole-Parmer 0597712
Prepare fresh buffer solutions with these handy pH buffer capsules. Empty the contents of one capsule into 100 mL of distilled water and stir. Buffer solutions are accurate to ±0.02 pH. Each vial contains ten capsules.
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