Tetrabromophenol blue

• CAT Number: L023293
• CAS Number: 4430-25-5
• Molecular Formula: C19H6Br8O5S
• Molecular Weight: 985.51
• Purity: ≥95%
• Storage: Room Temperature
• IUPAC Name: 2,6-dibromo-4-[4,5,6,7-tetrabromo-3-(3,5-dibromo-4-hydroxyphenyl)-1,1-dioxo-2,1λ6-benzoxathiol-3-yl]phenol
• InChI: InChI=1S/C19H6Br8O5S/c20-7-1-5(2-8(21)16(7)28)19(6-3-9(22)17(29)10(23)4-6)11-12(24)13(25)14(26)15(27)18(11)33(30,31)32-19/h1-4,28-29H
• InChIKey: QPMIVFWZGPTDPN-UHFFFAOYSA-N
• SMILES: C1=C(C=C(C(=C1Br)O)Br)C2(C3=C(C(=C(C(=C3Br)Br)Br)Br)S(=O)(=O)O2)C4=CC(=C(C(=C4)Br)O)Br

Tetrabromophenol Blue(CAT: L023293) is a halogenated sulfonephthalein dye widely used as a pH indicator and protein stain in biochemical and diagnostic applications. With a molecular formula of C₁₉H₁₀Br₄O₅S, it changes color from yellow to blue over a pH range of 3.0 to 4.6, making it suitable for acidic pH detection. It also binds selectively to proteins, enabling its use in colorimetric assays and gel staining techniques. Appearing as a reddish-brown to purple powder, it is soluble in ethanol and alkaline aqueous solutions. Tetrabromophenol Blue is valued for its sensitivity and specificity in molecular biology and clinical laboratory workflows.