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.

CAS：80370-57-6
中文别名：(6R,7R)-7-[2-(2-氨基噻唑-4-基)(甲氧基亚胺基)乙酰胺基]-3-[(2-呋喃基羰基)硫甲基]-8-氧代-5-硫杂-1-氮杂双环[4.2.0]辛-2-烯-2-甲酸;头孢替呋钠;
英文别名：CEFTIFURHCL;CeftiofurFreeAcid;CEFTIOFUR HCL;EXCENEL;ceftiofur acid;
分子式：C19H17N5O7S3
分子量：523.563
精确质量：523.029
Psa：256.26
Logp：1.891

外观与性状：白色至灰白色粉末
密度：1.81 g/cm3
折射率：1.819
储存条件：0-6ºC

海关编码：2941905700