Buffer Rinse Solution, In Portable Pouch, a mixture of acid and its conjugate base, is used to prevent changes in the pH of a solution. These solutions are mainly utilized to keep pH at a constant value in a variety of chemical applications. Spectrum solutions utilize the highest quality raw materials appropriate to your product. Most raw materials meet or exceed the specifications established by the American Chemical Society. Where appropriate, many finished products are traceable to NIST Standard Reference Materials. Manufacturing, quality control testing, and packaging are all performed in Spectrum's own facilities. Record keeping and sample retention of all produced lots ensure product consistency and complete traceability.