Description

Bromocresol Green Sodium Salt is a high-purity sodium salt derivative of the acid-base indicator bromocresol green. This compound is valued for its precise and reliable colorimetric properties, making it an essential reagent in analytical chemistry. It is primarily used by professionals in pharmaceutical quality control, clinical diagnostics, and research laboratories for pH determination and endpoint detection in titrations.

Application

• pH Indicator in Titrations: Used as a visual endpoint indicator in acid-base titrimetry, particularly in the pH range of 3.8 to 5.4 where it transitions from yellow to blue.
• Clinical Diagnostic Kits: A key component in reagent formulations for blood gas analysis and other diagnostic tests requiring precise pH measurement.
• Microbiological Media: Incorporated into culture media as a pH indicator to visualize metabolic activity and acid production.
• Biochemical Research: Employed in buffer solutions and enzymatic assays to monitor pH changes in reaction mixtures.
• Pharmaceutical Analysis: Used in compendial testing (e.g., USP, EP) for the assay and identification of various drug substances.
• Educational Laboratories: Serves as a standard indicator for teaching fundamental principles of analytical chemistry and titration techniques.

Basic Information

Product Name	Bromocresol Green Sodium Salt
CAS No.	67763-24-0
Molecular Formula	C21H13Br4NaO5S
Molecular Weight	720.00 g/mol
Synonyms	Bromocresol Green Sodium; 3',3'',5',5''-Tetrabromo-m-cresolsulfonphthalein Sodium Salt; Bromocresol Green Na Salt; BCG Sodium Salt; NSC 7570; Bromcresol Green Sodium Salt; Sodium 3',3'',5',5''-Tetrabromophenolsulfonphthalein
EINECS	Contact for details

Quality Control

Our Bromocresol Green Sodium Salt is manufactured under a strict quality management system. Each batch is tested to ensure it meets high-purity standards suitable for analytical and diagnostic applications. Certificates of Analysis (COA) detailing identity, purity, and performance are available upon request to support your regulatory and quality assurance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed in a low-humidity environment to prevent degradation.

Specification

Item	Specification
Appearance	Green to dark green powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
pH Transition Range	3.8 (yellow) to 5.4 (blue)
Loss on Drying	≤ 5.0 %
Residue on Ignition	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm

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