Alternative Name: beta-Nicotinamide Adenine Dinucleotide Phosphate (reduced form) . 4Na, beta-NADPH . 4Na. Formula: C21H26N7O17P3 . 4Na. MW: 741.4 . 92.0. CAS Number: 2646-71-1. Purity: ≥95% (HPLC). Appearance: White to light yellow powder. Solubility: Soluble in water (50mg/ml) or 0.01M sodium hydroxide. Use/Stability: NADPH is unstable in acid media. Stock solutions should be at pH 8. Long Term Storage: -20°C