Waters IonHance Difluoroacetic Acid is an MS-grade mobile-phase additive that can be used for LC and LC-MS techniques, such as reversed-phase separations of proteins, peptides, and small molecules. This reagent has been purified to achieve the low metal (sodium and potassium) content that is necessary for MS compatibility. Each vial of the standard is provided in an approximately 1 mL quantity and is contained within a high quality, chemically resistant PFA vial.Both the PFA and LDPE (low density polyethylene) containers are rigorously QC tested to ensure less than 100 ppb levels of sodium and potassium to achieve exquisitely high quality mass spectra. This product includes two 1.1 mL IonHance DFA vials and two 1000 mL LDPE mobile phase bottles to maintain the high levels of purity IonHance has to offer. *Disclaimer: Reference values for RM 8671 are not certified to be in correspondence with any Report of Investigation offered by the National Institute of Standards and Technology (NIST). If it is desirable to have such correspondence, it is advised that RM 8671 be directly acquired from NIST (nist.gov).