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Bromophenol blue is commonly used as a pH indicator, a color marker to monitor the progress of agarose or polyacrylamide gel electrophoresis, and a dye to detect proteins and nucleic acids (absorbance at 610 nm), particularly when staining living tissues. As an acid-base indicator its useful pH range is 3-4.6 where the color changes from yellow at pH 3.0 to purple at pH 4.6.Formal Name: 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis-2,6-dibromo-phenol. CAS Number: 115-39-9. Synonyms: Albutest, NSC 7818. Molecular Formula: C19H10Br4O5S. Formula Weight: 670.0. Formulation: (Request formulation change), A crystalline solid. Solubility: DMF: 30 mg/ml, DMSO: 30 mg/ml, Ethanol: 10 mg/ml, PBS (pH 7.2): 1 mg/ml. lambdamax: 206, 282, 424 nm. SMILES: O=S1(C2=CC=CC=C2C(C3=CC(Br)=C(O)C(Br)=C3)(C4=CC(Br)=C(O)C(Br)=C4)O1)=O. InChi Code: InChI=1S/C19H10Br4O5S/c20-12-5-9(6-13(21)17(12)24)19(10-7-14(22)18(25)15(23)8-10)11-3-1-2-4-16(11)29(26,27)28-19/h1-8,24-25H. InChi Key: UDSAIICHUKSCKT-UHFFFAOYSA-N. Origin: Synthetic.
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