SPL Set ID: 18e7366a-1b3e-4010-8f4a-dd559d4f2146

Cefazolin for injection, USP is a semi-synthetic cephalosporin for parenteral administration. It is the sodium salt of (6R, 7R)-3-[[(5-methyl-1,3,4-thiadiazol-2-yl)thio]methyl]-8-oxo-7-[2-(1H-tetrazol-1-yl)acetamido]-5-thia-1-azabicyclo [4.2.0]oct-2-ene-2-carboxylic acid. Structural Formula: Molecular Formula: C 14 H 13 N 8 NaO 4 S 3 Molecular Weight: 476.5 The sodium content is 24 mg (1.05 mEq) per 500 mg of cefazolin sodium and 48 mg (2.1 mEq) per 1 gram of cefazolin sodium. Cefazolin for Injection, USP is a sterile, white to yellowish powder. Cefazolin for injection, USP is supplied in vials equivalent to 500 mg of cefazolin or to 1 gram of cefazolin. chemical-structure