Certified pH Buffer Solution, pH 4 at 20°C, Coloured (Red), with Fungicide

The ALK-PH4-20CF is a certified pH 4 buffer solution from Paragon Scientific. This red-colored liquid is formulated to provide a highly accurate and stable pH reference at 20 degrees Celsius. Incorporated into the solution is a fungicide to prevent microbial contamination, extending its usable lifespan. This product is widely used in laboratories for calibrating pH meters and in various applications requiring a precise pH 4 standard.