Nitrocefin ≥95%
Supplier: Cayman Chemical
Nitrocefin is a chromogenic cephalosporin substrate commonly used to detect β-lactamases in bacteria. The presence of β-lactamase activity is indicated by the appearance of a red color that is proportional in intensity to the original concentration of nitrocefin.
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Nitrocefin ≥95% (by UV method) dye, Calbiochem®, Sigma-Aldrich®
Supplier: Merck Millipore (Calbiochem)
A chromogenic β-lactamase substrate that undergoes distinctive color change from yellow (λmax = 390 nm at pH 7.0) to red (λmax = 486 nm at pH 7.0) as the amide bond in the β-lactam ring is hydrolyzed by β-lactamase