Description

Bromocresol Blue Sodium Salt is a high-purity sodium salt derivative of the widely used acid-base indicator, bromocresol green. This compound is valued for its precise and reliable colorimetric properties in analytical chemistry. It serves as a critical reagent for pH determination and endpoint detection in titrations across pharmaceutical, biotechnology, and chemical manufacturing industries.

Application

• pH Indicator in Titrations: Primary use as a visual and spectrophotometric endpoint indicator in acid-base titrations, particularly in the pH range of 3.8 (yellow) to 5.4 (blue).
• Microbiological & Cell Culture Media: Used as a pH indicator in various agar plates and liquid culture media to monitor metabolic activity and pH shifts.
• Clinical & Diagnostic Reagents: A component in diagnostic kits and laboratory reagents for biochemical analysis and medical testing.
• Analytical Chemistry Standards: Serves as a reference standard and calibration material in spectroscopic and chromatographic methods.
• Biochemical Research: Employed in electrophoresis, chromatography, and other laboratory techniques for visualization and analysis.
• Industrial Process Control: Monitors pH in specific manufacturing processes within the chemical and water treatment sectors.

Basic Information

Product Name	Bromocresol Blue Sodium Salt
CAS No.	62625-32-5
Molecular Formula	C21H14Br4O5S · xNa
Molecular Weight	Contact for details
Synonyms	Bromocresol Blue, Sodium Salt; 3',3'',5',5''-Tetrabromophenolsulfonephthalein Sodium Salt; Bromcresol Blue Sodium Salt; BCB Sodium Salt; Bromothymol Blue (related compound, common confusion); Bromocresol Green Sodium Salt (common confusion); Acid Blue; NSC 72905
EINECS	Contact for details

Quality Control

Our Bromocresol Blue Sodium Salt is manufactured under a quality management system and undergoes rigorous analytical testing to ensure batch-to-batch consistency and performance. Specifications are aligned with reagent-grade standards for laboratory use. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and performance tests is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at room temperature (15-25°C). The product is light-sensitive and should be handled accordingly to maintain stability.

Specification

Item	Specification
Appearance	Dark greenish-blue to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
pH Transition Range	3.8 (yellow) - 5.4 (blue)
Loss on Drying	≤ 5.0 %
Solubility	Soluble in water and ethanol

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