Buffer Solution, pH 7.0, Coded Yellow *


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Component CAS-No Weight %
Water 7732-18-5 99.18
Dihydrogen potassium phosphate 7778-77-0 0.7
Sodium Hydroxide 1310-73-2 0.1
FD&C yellow No. 5 1934-21-0 0.0 - 0.02

A buffer solution has the capability to resist change in its pH upon the addition of acid or base in a small quantity. It possesses a working range of pH values and capacity that dictates its stability before any change and the amount by which it will change. It usually consists of a weak conjugate acid-base pair. This pair might contain a weak acid and its conjugate base, or a weak base and its conjugate acid. The choice of the pair is simply dependent upon the desiredpH when preparing the buffer solution. Lab Alley’s Buffer Solution, pH 7.0, Coded Yellow is a combination of Dihydrogen Potassium Phosphate (0.7 wt.%), Sodium Hydroxide (0.1 wt.%), FD&C Yellow No. 5 (0.0-0.02 wt.%), and purified Water (balanced). It is color-coded yellow for easy identification and appears as an opaque liquid at ambient conditions. In the United States of America (USA), Lab Alley is selling its high-quality Buffer Solution, pH 7.0, Coded Yellow online at laballey.com. Due to its high purity, this Lab Alley product is highly recommended for labs and commercial applications.

Common Uses
  • Reagent
  • Calibration of pH meters
  • Titrimetric analysis
Safety and Handling

Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Buffer pH7 (Coded Yellow).

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