CAS 27164-46-1 appears in our catalog under these names: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-[[(5-methyl-1,3,4-thiadiazol-2-yl)thio]methyl]-8-oxo-7-[[2-(1H-tetrazol-1-yl)acetyl]amino]-, sodium salt (1:1), (6R,7R)-, 98%, 98%, Cefazolin Sodium Salt, Cefazolin Sodium, Cefazolin Sodium Salt, >95% (HPLC), 7-epi-Cefazolin Sodium Salt. Offered by: Chemat, Chemat Brand, Mikromol, LoGiCal, Dr. Ehrenstorfer. Available pack sizes: 1g, 5g, 10g, 15g, 25g, on request, 100mg, 10mg.