205478

Bromoxylenol Blue

indicator grade, Dye content 95 %

• Synonym(s): 3′,3″-Dibromo-p-xylenolsulfonphthalein
• Empirical Formula (Hill Notation): C₂₃H₂₀Br₂O₅S
• CAS Number: 40070-59-5
• Molecular Weight: 568.27
• Beilstein: 369060
• EC Number: 254-780-4
• MDL number: MFCD00005873
• UNSPSC Code: 12171500
• PubChem Substance ID: 24852334
• NACRES: NA.47

Properties

• grade: indicator grade
• form: powder or crystals
• composition: Dye content, 95%
• technique(s): titration: suitable
• pH: 6.0-7.6, yellow to blue
• mp: 218 °C (dec.) (lit.)
• solubility: ethanol: 1 mg/mL, clear
• λmax: 417 nm
• ε (extinction coefficient): ≥16000 at 417-421 nm in methanol at 0.016 g/L
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: room temp
• SMILES string: Cc1cc(c(C)c(Br)c1O)C2(OS(=O)(=O)c3ccccc23)c4cc(C)c(O)c(Br)c4C
• InChI: 1S/C23H20Br2O5S/c1-11-9-16(13(3)19(24)21(11)26)23(17-10-12(2)22(27)20(25)14(17)4)15-7-5-6-8-18(15)31(28,29)30-23/h5-10,26-27H,1-4H3
• InChI key: MRDOFVRMTNWMDA-UHFFFAOYSA-N

Description

General description

Bromoxylenol blue (BXB) belongs to the sulfonphthalein family. It is also known as 3′,3′′-dibromo-p-xylenol sulfonphthalein.

Application

Bromoxylenol blue is a pH indicator (for pH ranges 6.0-7.6) that is routinely used in acid-base titrations. It is also used for the photometric determination of carboxylic acid impurities in organic liquids and polymers.

Recent applications of bromoxylenol blue include:

• Building pH sensors
• Developing optical sensors for high acidity measurements
• Synthesizing antifungal activity compounds
• Determination of drugs
• In fiber-optic biosensors for the determination and detection of pesticides.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves