Buffer Concentrated Solution pH 4 (Phthalate) by Fisher Chemical · SKU 10508050 Overview This concentrated buffer solution is formulated to produce a pH 4 (phthalate) buffer when diluted as specified by the manufacturer. Supplied as a set of 6 ampoules, it is intended for preparation of calibration buffers in analytical laboratories. Highlights Buffer type: pH 4 (phthalate) Concentrated solution format Supplied in ampoules Pack size: 6 ampoules At-a-glance Product Type Buffer concentrate pH Value 4 Buffer System Phthalate Pack Size 6 ampoules Condition New / Unused Applications Used for preparation of pH calibration buffers in analytical and quality control laboratories. Suitable for calibration and verification of pH measurement systems. Sustainability By rehoming surplus lab products, this listing supports waste reduction and resource efficiency.