Description

Tetrabromophenol Blue Disodium Salt is a high-purity, water-soluble dye salt widely used as a sensitive pH indicator and colorimetric reagent. Its distinct color transition across a specific pH range makes it an essential tool for analytical chemistry and biological research. This product is primarily utilized by manufacturers and researchers in the chemical, pharmaceutical, and life science industries for precise endpoint detection and diagnostic applications.

Application

• pH Indicator: Used in analytical chemistry for titrations and pH determination due to its clear visual transition.
• Biological Staining: Employed in histological and cytological staining procedures for microscopy.
• Diagnostic Reagents: A key component in the formulation of test strips and kits for clinical and laboratory diagnostics.
• Research & Development: Serves as a colorimetric reagent in biochemical assays and research protocols.
• Dye Intermediate: Acts as a precursor or intermediate in the synthesis of other specialized dyes and pigments.
• Educational Kits: Included in chemistry educational kits to demonstrate acid-base reactions and indicator properties.

Basic Information

Product Name	Tetrabromophenol Blue Disodium Salt
CAS No.	81590-28-5
Molecular Formula	C19H6Br4Na2O5S
Molecular Weight	727.91 g/mol
Synonyms	Tetrabromophenolsulfonephthalein Disodium Salt; 3',3'',5',5''-Tetrabromophenolsulfonephthalein Sodium Salt; TBPB; Bromophenol Blue, Tetrabromo-; Acid Blue 90; C.I. 45440; Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis[2,6-dibromo-, S,S-dioxide, sodium salt (1:2)
EINECS	Contact for details

Quality Control

Our Tetrabromophenol Blue Disodium Salt is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high performance. Each lot is tested to confirm identity, purity, and suitability for its intended applications. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to purple powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
pH (1% Solution)	3.0 - 4.5 (Yellow); 10.1 - 11.1 (Blue)
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, blue solution

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