ONP

o-nitrophenol


 * Beta-galactosidase cleaves ONPG to produce ONP and galactose.
 * The molar extinction coefficient is reported to be either 4500 M-1cm-1 Skoneczny-BiochemJ-2000 or 4900 M-1cm-1 Onishi-ApplEnvironMicrobiol-1995 (not original references, better references would be preferable).
 * Slightly soluble in water (0.21 g/100ml or 2.1mg/mL)