Description Widely used buffer in amino acid analysis. Form White crystalline solid CAS number 6132-04-3 RTECS GE8300000 Molar mass 294.1 Chemical formula C?H?O?Na? · 2H?O Purity ?99% by titration Contaminants DNases, proteases, RNases: none detected. Absorbance (260 nm and 280 nm): ?0.015. Heavy metals: ?0.001% (as Pb) Solubility H?O (100 mg/ml) Storage +15°C to +30°C Do Not Freeze No Special Instructions Following reconstitution, store at room temperature (20°C). Stock solutions are stable for up to 6 months at 20°C. Toxicity Standard Handling Merck USA index 14, 8602