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CAS No.: 80370-57-6
Formula: C19H17N5O7S3
Exact Mass: 523.02900
Molecular Weight: 523.56300
PSA: 256.26000
LogP: 1.89100
Reference Price: $1,239/g Post Buying Request
Description Feedback
Ceftiofur is an antibiotic of the cephalosporin type (third generation), licensed for use in veterinary medicine. It was first described in 1987. It is marketed by pharmaceutical company Zoetis as Excenel, Naxcel, and Excede and is also the active ingredient in that company's Spectramast LC (lactating cow formulation) and Spectramast DC (dry cow formulation) product.
It is resistant to the antibiotic resistance enzyme beta-lactamase, and has activity against both Gram-positive and Gram-negative bacteria. E. coli strains resistant to ceftiofur have been reported.
The metabolite desfurolyceftiofur also has antibiotic activity. The two compounds are measured together to measure for antibiotic activity in milk (alongside other antibiotics).

Properties Feedback
Appearance & Physical State:White to off-white powder
Density:1.81 g/cm3
Refractive Index:1.819
Storage Condition:0-6ºC

Safety Info Feedback
HS Code:2941905700

Synthesis Route Total: 3 Synthesis Route
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Precursor and Product