Bis-tris propane, or 1,3-bis(tris(hydroxymethyl)methylamino)propane, is a chemical substance that is used in buffer solutions. It is a white to off-white crystalline powder that is soluble in water. It has a wide buffering range, from 6 to 9.5 due to its two pKa values which are close in value. This buffer is primarily used in biochemistry and molecular biology.

CAS：64431-96-5
中文别名：1,3-二[三(羟甲基)甲氨基]丙烷;BIS-TRIS 丙烷;1,3-双[三(羟甲基)甲氨基]丙烷;1,3-双(三羟甲基甲氨基)丙烷;双[三(羟甲基)氨基丙烷];双三羟基甲氨基丙烷;双三羟基甲氨基丙烷,1,3-双[三(羟甲基)甲基胺]丙烷;1,3-双[三(羟甲基)甲基胺]丙烷;Bis-Tris丙烷;1,3-二[三(羟甲基)甲氨基]丙烷(BIS-TRISPROPANE);
英文别名：BIS-Tris Propane,ULTROL Grade;1,3-Bis[tris(hydroxymethyl)methylamino]propane;BIS-TRIS PROPANE;BIS-TRISPROPANE,BIOLOGICALBUFFER;Bistrishydroxymethylmethylaminopropane;BIS-TRIS PROPANE SIGMAULTRA;
分子式：C11H26N2O6
分子量：282.334
精确质量：282.179
Psa：145.44
Logp：-3.2311

MDL号：MFCD00004689

外观与性状：白色至灰白色结晶粉末
密度：1.326 g/cm3
沸点：573.3ºC at 760 mmHg
熔点：164-165°C(lit.)
闪点：224.5ºC
折射率：1.565
储存条件：Store at RT.

安全说明：S22-S24/25-S26
危险类别码：R20/21/22; R36/37/38
WGK Germany：3
危险品标志：Xn