BIS-Tris, ULTROL® Grade A zwitterionic buffer that exhibits only a very small shift in dissociation constant with respect to temperature. Useful in the pH 5.8-7.3 range. Has a pKa of 6.50 at 25°C. Suitable for fractionation of hemoglobin. Absorbance (100 mM, H2O, 280 nm):≤0.04. 产品信息 Form White solid Molar mass 209.2 Purity ≥99% by titration Heavy metals <1 ppm PKA 6.5 at 20°C Solubility H2O Chemical formula C8H19O5N CAS number 6976-37-0 商店和运输信息 Storage +15°C to +30°C Ship Ambient Temperature Only Standard Handling