Bromocresol Green Cas 62625-32-5

Chemical Name: Bromocresol Green
CAS No.: 62625-32-5
Molecular Formula: C21H15Br4NaO5S
Molecular Weight: 722.01

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Bromocresol Green (Cas 62625-32-5) User Guide

Table of Contents

Product Overview & Specifications

Bromocresol Green (Cas 62625-32-5) is a pH-sensitive triphenylmethane dye widely used in biochemical and analytical chemistry. Key parameters:

Parameter Bromocresol Green Bromocresol Purple (Comparison)
CAS Number 62625-32-5 115-40-2
Molecular Formula C21H14Br4O5S C21H16Br2O5S
Molecular Weight 698.01 g/mol 540.22 g/mol
pH Range 3.8 (yellow) – 5.4 (blue) 5.2 (yellow) – 6.8 (purple)
Solubility Soluble in ethanol, alkali; insoluble in water Soluble in ethanol, dilute alkali

Applications & Use Cases

Primary Uses

  • Laboratory Analysis: pH indicator in titrations (e.g., weak acid/base detection).
  • Biochemical Assays: Protein concentration measurement via Bradford assay.
  • Environmental Testing: Detection of carbonate/bicarbonate in water quality analysis.

Step-by-Step Usage Examples

Example 1: Acid-Base Titration

  1. Prepare 0.1% w/v solution in 20% ethanol.
  2. Add 2-3 drops to analyte solution.
  3. Observe color transition from yellow (pH <3.8) to blue (pH >5.4).

Client Case Studies

Case 1: University of Cambridge (UK)

  • Application: Monitoring algal photosynthesis efficiency in environmental research.
  • Result: Achieved 95% accuracy in pH-dependent metabolic rate measurements.

Case 2: Novartis AG (Switzerland)

  • Application: Quality control in antacid tablet production.
  • Result: Reduced batch rejection rate by 22% through precise endpoint detection.

Inquiry & Contact

For pricing, bulk orders, or technical support:

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