4-Nitrophenyl Butyrate

4-Nitrophenyl butyrate (4-NPB) is a colorimetric substrate for lipases. Upon hydrolysis, 4-NPB is converted into p-nitrophenoxide, which can be monitored using UV-Vis spectrophotometry at 400 nm to quantify lipase activity.Formal Name: butanoic acid, 4-nitrophenyl ester. CAS Number: 2635-84-9. Synonyms: p-Nitrophenyl Butyrate, para-Nitrophenyl Butyrate, 4-NPB, NSC 6867. Molecular Formula: C10H11NO4. Formula Weight: 209.2. Purity: >95%. Formulation: (Request formulation change), A neat oil. Solubility: DMF: 30 mg/ml, DMSO: 30 mg/ml, DMSO:PBS (pH 7.2) (1:1): 0.5 mg/ml, Ethanol: 15 mg/ml. lambdamax: 270 nm. SMILES: O=C(CCC)OC1=CC=C([N+]([O-])=O)C=C1. InChi Code: InChI=1S/C10H11NO4/c1-2-3-10(12)15-9-6-4-8(5-7-9)11(13)14/h4-7H,2-3H2,1H3. InChi Key: DVDUMIQZEUTAGK-UHFFFAOYSA-N.