Description

Bromophenol Blue Sodium Salt is a high-purity sodium salt derivative of the widely used acid-base indicator Bromophenol Blue. This compound is valued for its excellent solubility in aqueous solutions, making it a preferred choice for precise pH determination and as a tracking dye in various analytical techniques. It is essential for research laboratories, diagnostic kit manufacturers, and quality control departments in the pharmaceutical and biotechnology industries seeking reliable and consistent performance in their processes.

Application

• pH Indicator: Used in microbiological media, cell culture, and titration experiments for visual pH endpoint detection, typically in the range of pH 3.0 (yellow) to 4.6 (blue).
• Electrophoresis Tracking Dye: Serves as a common front-running dye in agarose and polyacrylamide gel electrophoresis (PAGE) to monitor the progress of nucleic acid and protein separation.
• Diagnostic Reagents: Incorporated into clinical diagnostic strips and kits for urinalysis and other biochemical tests that require a colorimetric pH change.
• Biochemical Research: Employed in buffer preparation and as a visual aid in enzymatic assays and other laboratory procedures requiring pH monitoring.
• Industrial Process Control: Applied in certain chemical manufacturing processes where a non-toxic, visible pH indicator is needed for reaction monitoring.

Basic Information

Product Name	Bromophenol Blue Sodium Salt
CAS No.	34725-61-6
Molecular Formula	C19H9Br4O5S·Na
Molecular Weight	691.94 g/mol
Synonyms	3',3'',5',5''-Tetrabromophenolsulfonephthalein Sodium Salt; Bromphenol Blue Sodium Salt; BPB Sodium Salt; Acid Blue 90; Tetrabromophenol Blue Sodium Salt; Sodium 3',3'',5',5''-Tetrabromophenolsulfonephthalein; Bromophenol Blue, water soluble
EINECS	Contact for details

Quality Control

Our Bromophenol Blue Sodium Salt is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including identification, purity assay, and impurity profiling, to ensure it meets the high standards required for research and diagnostic applications. A Certificate of Analysis (COA) detailing specific results for parameters such as absorbance, pH transition range, and purity is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is sealed tightly after each use to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	Dark blue to purple powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
pH Transition Range	3.0 (yellow) to 4.6 (blue)
Loss on Drying	≤ 5.0 %
Absorbance (1% Solution)	Conforms
Solubility (in Water)	Freely soluble

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.