Description

Tetrabromophenol Blue Sodium Salt is a high-purity, water-soluble dye salt widely used as a sensitive pH indicator and colorimetric reagent. Its primary value lies in providing a sharp, distinct color transition within specific pH ranges, enabling precise endpoint detection in analytical chemistry. This compound is essential for researchers and quality control laboratories in the pharmaceutical, chemical, and biotechnology sectors requiring reliable visual or spectrophotometric analysis.

Application

• pH Indicator: Used in analytical chemistry for titrations and pH determination, typically exhibiting a color change from yellow to blue in the pH range of 3.0 to 4.6.
• Biochemical Staining: Employed in gel electrophoresis (e.g., SDS-PAGE) for protein detection and as a tracking dye due to its anionic properties and distinct color.
• Spectrophotometric Analysis: Serves as a reagent in colorimetric assays for the determination of various ions and biomolecules based on complex formation.
• Diagnostic Reagents: A component in the formulation of test strips and kits for clinical and environmental testing.
• Research & Development: Utilized in academic and industrial R&D for method development and as a model compound in photochemical studies.
• Teaching & Education: A common demonstrative tool in educational laboratories for teaching acid-base chemistry and indicator principles.

Basic Information

Product Name	Tetrabromophenol Blue Sodium Salt
CAS No.	108321-10-4
Molecular Formula	C19H8Br4Na2O5S
Molecular Weight	727.93 g/mol
Synonyms	Tetrabromophenol Blue, Sodium Salt; 3',3'',5',5''-Tetrabromophenolsulfonephthalein, Sodium Salt; TBPB Sodium Salt; Acid Blue 93; C.I. 42780; Tetrabromophenol Blue; Bromophenol Blue, Tetrabromo Derivative, Sodium Salt
EINECS	Contact for details

Quality Control

Our Tetrabromophenol Blue Sodium Salt is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and performance consistency. A Certificate of Analysis (COA) detailing specifications such as assay, absorbance characteristics, and impurity profile is provided with every shipment to guarantee it meets the rigorous standards required for analytical and research applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to minimize exposure to atmospheric humidity.

Specification

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

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