Tris Base, Molecular Biology Grade tris(Hydroxymethyl)aminomethane Useful in the pH range of 7.0-9.0. Has a pKa of 8.1 at 25°C. 产品信息 Form White solid Molar mass 121.1 Purity ≥99% by titration test (perchloric acid titration) Contaminants RNases, DNases, proteases: none detected. Absorbance (260 nm): ≤0.03; (280 nm): ≤0.02 Heavy metals ≤0.0005% PKA 8.30 at 20°C Solubility H2O Chemical formula C4H11NO3 RTECS TY2900000 CAS number 77-86-1 Merck USA index 14, 9772 商店和运输信息 Storage +15°C to +30°C Ship Ambient Temperature Only Irritant
