Ar Bromothymol Blue
Analytical Indicator
Analytical Reagent

AR Grade Bromothymol Blue Indicator

Analytical Reagent grade bromothymol blue indicator manufactured for pH determination, neutral point titrations, and analytical chemistry. Our AR grade bromothymol blue provides reliable colorimetric properties for research applications, analytical procedures, and precision neutral pH detection.

  • Analytical Grade Purity
  • pH Range 6.0 - 7.6
  • Neutral Point Titrations
  • Research Laboratory Use
  • Clear Color Transition
  • Neutral pH Detection
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Technical Specifications

Chemical Formula: C₂₇H₂₈Br₂O₅S
CAS Number: 76-59-5
EINECS Number: 200-972-8
Molecular Weight: 624.38 g/mol
Physical State: Blue-green crystalline powder
pH Transition Range: 6.0 (yellow) - 7.6 (blue)
pKa Value: 7.1
Solubility in Water: 0.1 g/100ml (25°C)
Solubility in Ethanol: Readily soluble
Melting Point: 201-204°C
Loss on Drying: ≤ 1.0%
Chloride (Cl): ≤ 0.01%
Sulfate (SO₄): ≤ 0.01%
Heavy Metals (as Pb): ≤ 0.002%
Indicator Sensitivity: Sharp color change
Storage Conditions: Cool, dry place, protect from light
Packaging Options: 25g, 100g, 500g plastic bottles

Applications

pH Indicator (6.0-7.6)
Acid-Base Titrations
Educational Chemistry Labs
Environmental pH Testing
Biological Buffer Systems
Analytical Chemistry
Soil pH Analysis
Water Quality Testing
Pharmaceutical Analysis
Industrial Process Control
Research Applications
Quality Control Testing

Industry-Specific Grades

DRAVYOM offers specialized bromothymol blue grades tailored for specific analytical and research requirements, ensuring optimal indicator performance and regulatory compliance across diverse laboratory applications.

AR Grade (Analytical Reagent)
Purity: ≥ 99.0% Heavy Metals: ≤ 0.002% pH Range: 6.0-7.6 Application: General analytical procedures
ACS Grade (Certified)
Purity: ≥ 99.5% Loss on Drying: ≤ 1.0% Chloride: ≤ 0.01% Application: ACS certified analytical work
Research Grade
Purity: ≥ 99.8% Color Change: Sharp transition Documentation: Complete COA Application: Advanced research work
Educational Grade
Purity: ≥ 98.0% Safety: Student-safe formulation Packaging: Small quantities Application: Teaching laboratories

Quality Standards

DRAVYOM's AR Grade Bromothymol Blue is manufactured under stringent quality control protocols, meeting international analytical standards including ACS, ISO, and pharmacopoeia specifications. Our analytical-grade production ensures consistent indicator performance and regulatory compliance.

ISO 9001:2015 Certified Manufacturing
ACS Grade Specifications
Sharp pH Transition Range
Advanced Purity Testing
Consistent Color Performance
Batch-to-Batch Consistency
Traceable Certificate of Analysis
Light-Protected Storage

Advanced Chemical Properties & Performance

AR Grade Bromothymol Blue exhibits exceptional pH indicator properties with precise color transitions. Its ultra-pure composition ensures reliable performance in acid-base titrations, biological pH monitoring, and analytical procedures requiring accurate pH determination.

Indicator Properties
Transition Range: pH 6.0-7.6
pKa Value: 7.1 at 25°C
Color Change: Yellow (acid) to Blue (base)
Midpoint Color: Green at pH 7.1
Physical Properties
Appearance: Crystalline powder (dark green)
Solubility (Water): Moderately soluble
Solubility (Ethanol): Freely soluble
Working Concentration: 0.1% aqueous solution
Analytical Performance
Color Intensity: High extinction coefficient
Transition Sharpness: 1.6 pH unit range
Temperature Coefficient: -0.007 pH/°C
Ionic Strength Effect: Minimal interference
Purity Specifications
Assay: ≥99.0%
Water Content: ≤2.0%
Heavy Metals: ≤0.001%
Insoluble Matter: ≤0.1%
Stability Properties
Shelf Life: 5 years (powder), 1 year (solution)
Light Sensitivity: Stable in normal light
pH Stability: Stable across pH range
Temperature Stability: Stable up to 80°C

Performance Characteristics

Detailed performance metrics demonstrate AR Grade Bromothymol Blue superiority in pH indication with exceptional color transition clarity, reliable endpoint detection, and reproducible results across diverse analytical and biological applications.

Color Transition

Sharp change: Yellow-Green-Blue progression

Excellent visual discrimination
pH Precision

Transition range: pH 6.0-7.6

Optimal near-neutral detection
Visual Clarity

High contrast: Distinct color differences

Clear endpoint determination
Temperature Stability

Working range: 15-60°C

Wide temperature tolerance
Batch Consistency

Variation: ±0.05 pH units between batches

Outstanding lot-to-lot reproducibility
Solution Stability

Stable for 1 year in proper storage

Extended working solution life

Safety Information

Handle with standard laboratory precautions. May cause mild eye and skin irritation. Avoid dust inhalation and ingestion. Use appropriate protective equipment including safety goggles and gloves. Ensure adequate ventilation during powder handling and solution preparation.

Mild Irritant
Avoid Dust Inhalation
Eye Protection Required

Storage & Handling

Store powder in original containers in a cool, dry place away from strong acids and bases. Prepared solutions should be stored in amber glass containers and protected from extreme temperatures. Handle with care to prevent contamination and maintain indicator integrity.

Cool, dry storage (15-25°C)
Protect from strong acids/bases
Amber glass for solutions
Protect from moisture

Chemical Mechanisms & Reaction Pathways

Bromothymol Blue exhibits pH-dependent color transition mechanisms through protonation equilibria, making it suitable for analytical applications requiring precise pH indication and acid-base titration endpoint detection.

Acid-Base Equilibrium

HIn ⇌ H⁺ + In⁻ with distinct color forms

pH-dependent color transition
Color Transition

Yellow (acidic) ⇌ Green (neutral) ⇌ Blue (basic)

Visual pH indication system
Structural Changes

Quinoid-benzenoid structural transitions affecting absorption

Molecular basis of color change
Optical Properties

Wavelength absorption shifts: 435 nm (yellow) to 615 nm (blue)

Spectrophotometric applications
Solution Behavior

pKa ≈ 7.1 providing sharp transition around neutral pH

Optimal neutral pH indication

Regulatory Compliance & Documentation

Comprehensive regulatory compliance ensures global analytical laboratory access with complete documentation packages supporting international standards and analytical method validations.

ACS Specifications

American Chemical Society analytical reagent standards compliance

ISO 6353 Standard

International standard for reagent specifications and testing

USP Grade Available

United States Pharmacopeia specifications for pharmaceutical analysis

REACH Registration

European Union chemical regulation compliance

EPA Method Support

Validated for EPA environmental analytical methods

SDS Documentation

Multi-language Safety Data Sheets (16 sections, GHS compliant)

Technical Support & Value-Added Services

DRAVYOM's analytical chemistry team provides comprehensive indicator method support, troubleshooting assistance, and analytical services to optimize AR Grade Bromothymol Blue performance in your specific analytical applications.

Indicator Method Development
  • pH indicator optimization protocols
  • Concentration adjustment guidance
  • Color transition enhancement
  • Endpoint detection techniques
Analytical Services
  • Certificate of Analysis verification
  • Custom purity testing
  • pH transition validation
  • Color stability assessment
Technical Support
  • Titration method consultation
  • Safe handling and storage training
  • Method transfer support
  • Laboratory safety protocols
Performance Services
  • Method validation support
  • System suitability testing
  • Stability studies
  • Quality assurance consultation

Environmental Impact & Sustainability

Our AR Grade Bromothymol Blue production emphasizes environmental responsibility through sustainable manufacturing practices, controlled organic synthesis, and comprehensive environmental impact management for analytical laboratory operations.

Biodegradable Dye

Environmentally friendly indicator with natural degradation

Waste Minimization

Optimized concentrations reducing chemical usage

Clean Synthesis

Energy-efficient production with emission controls

Safe Disposal

Comprehensive disposal and neutralization guidance

ISO 14001

Environmental management system certified production

Container Recycling

Glass container return and recycling programs

Manufacturing Excellence & Quality Control

DRAVYOM's state-of-the-art analytical reagent manufacturing facility employs advanced purification technology with continuous monitoring systems to ensure consistent AR Grade Bromothymol Blue quality and performance across all production batches.

Production Process

Controlled synthesis with high-purity precursors and purification

Precise color quality and transition control
Quality Testing

16-point analytical testing protocol including pH transition and purity

Spectrophotometric verification and color assessment
Quality Systems

ISO 9001:2015 quality management with analytical laboratory accreditation

Continuous improvement and method validation
Packaging Control

Light-resistant containers with controlled atmosphere protection

Color stability preservation and contamination prevention

Market Applications & Performance Data

Comprehensive analytical laboratory data demonstrating AR Grade Bromothymol Blue effectiveness across diverse applications with quantified performance metrics and analytical method validations.

pH Indication
Transition range: pH 6.0-7.6 Precision: ±0.1 pH units Color clarity: Distinct yellow/blue transition
Visual Detection
Color intensity: High contrast transitions Sensitivity: 0.01% concentration effective Reproducibility: Consistent color development
Titration Performance
Endpoint sharpness: Clear transition point Accuracy: ±0.02 mL endpoint detection Temperature stability: 15-35°C range
Validation Data
Method validation: USP indicator standards Stability: 36+ months proven shelf life Reproducibility: <0.01% RSD batch-to-batch

DRAVYOM Competitive Advantages

Ultra-Pure Indicator Quality

Purity >99%, sharp color transitions, guaranteed performance

Superior pH Precision

Enhanced color clarity for accurate pH determination

Multi-Standard Compliance

ACS, USP, and ISO specifications with comprehensive documentation

Light-Protected Logistics

UV-protected supply chain maintaining color integrity

Analytical Chemistry Expertise

Support team with pH indicator specialists

Environmental Responsibility

Biodegradable indicator with minimal environmental impact