The Verichem Urine Chemistry Standard Kit is an aqueous in vitro diagnostic product. It is intended for calibration or calibration verification of clinical chemistry test systems with known, gravimetric concentrations. Ready to use. Synthetic matrix: free of surfactants, glycols, azide and other interfering substances. Shelf life: 17 months from date of manufacture. Treat as patient specimen with any wet chemistry urine test. Kit size: five concentration levels, 15ml each level.