The formula ,C13H16NNaO4 The molecular weight, 273.26 The CAS number. 26774-89-0 The formula ,C13H16NNaO4The molecular weight, 273.26The CAS number. ... 26774-89-0Appearance: white or white crystalline powderWater: less than 0 ... 85°- -95°(C=4%,1N HCL)Free benzene glycine 1.0% MAX.Package. 25 kg/box , 20 kg/barrelCefalexin intermediates ...