Hydrion Buffer Chemvlp Ph7 , Pack Of 5

Details:

Hydrion buffer chemvelope ph 7.0^ 5 Envelopes/pk. Triple protective foil of aluminum, polyethylene and paper. When dissolved in 500 ml. Distilled water, makes a precise 7.0 Buffer solution. 5 Envelopes & 1 dispensing vial of hydrion color key buffer preservative per pack. (Traceable to nist stds)