Ar Eriochrome Black T
Analytical Complexometric
Analytical Reagent

AR Grade Eriochrome Black T

Analytical Reagent grade Eriochrome Black T manufactured for complexometric titrations, water hardness testing, and EDTA titrations. Our AR grade EBT provides reliable metallochromic properties for research applications, analytical procedures, and precise metal ion determination.

  • Analytical Grade Purity
  • Complexometric Titrations
  • Water Hardness Testing
  • EDTA Titration Indicator
  • Metal Ion Detection
  • Research Laboratory Use
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Technical Specifications

Chemical Formula: C₂₀H₁₂N₃NaO₇S
CAS Number: 1787-61-7
Molecular Weight: 461.38 g/mol
Physical State: Dark blue-black crystalline powder
pH Transition Range: 7.0 (red) - 11.0 (blue)
Solubility in Water: Readily soluble
Solubility in Ethanol: Slightly soluble
Complex Formation: Metal-EDTA complexes
Loss on Drying: ≤ 5.0%
Chloride (Cl): ≤ 0.05%
Sulfate (SO₄): ≤ 0.1%
Heavy Metals (as Pb): ≤ 0.002%
Indicator Sensitivity: Sharp endpoint detection
Storage Conditions: Cool, dry place, protect from light
Packaging Options: 25g, 100g, 500g plastic bottles

Applications

EDTA Titrations
Metal Ion Detection
Complexometric Analysis
Educational Chemistry Labs
Water Hardness Testing
Analytical Chemistry
Industrial Analysis
Environmental Testing
Pharmaceutical Analysis
Quality Control Testing
Research Applications
Reference Standards

Industry-Specific Grades

DRAVYOM offers specialized Eriochrome Black T grades tailored for specific analytical and research requirements, ensuring optimal complexometric performance and regulatory compliance across diverse laboratory applications.

AR Grade (Analytical Reagent)
Purity: ≥ 99.0% Heavy Metals: ≤ 0.002% Indicator Quality: Excellent Application: General analytical procedures
ACS Grade (Certified)
Purity: ≥ 99.5% Loss on Drying: ≤ 5.0% Chloride: ≤ 0.05% Application: ACS certified analytical work
Titration Grade
Purity: ≥ 99.8% Endpoint Detection: Sharp Documentation: Complete COA Application: EDTA titrations
Educational Grade
Purity: ≥ 98.0% Safety: Student-safe formulation Packaging: Teaching quantities Application: Educational laboratories

Quality Standards

DRAVYOM's AR Grade Eriochrome Black T 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 EDTA Endpoints
Advanced Purity Testing
Consistent Metal Complex Formation
Batch-to-Batch Consistency
Traceable Certificate of Analysis
Light-Protected Storage

Advanced Chemical Properties & Performance

AR Grade Eriochrome Black T exhibits exceptional metallochromic indicator properties essential for complexometric titrations. Its ultra-pure composition ensures reliable performance in EDTA titrations, water hardness determination, and metal ion detection requiring precise color change endpoints.

Indicator Properties
Metal Complex Color: Wine red (bound)
Free Indicator Color: Blue (unbound)
pH Sensitivity: Optimal at pH 10-11
Transition: Sharp wine red to blue
Physical Properties
Appearance: Dark brown-black powder
Molecular Weight: 461.4 g/mol
Solubility: Water and ethanol soluble
UV-Vis Absorption: λmax 618 nm (metal complex)
Titration Performance
Metal Selectivity: Ca²⁺, Mg²⁺, Zn²⁺ binding
Working pH Range: pH 9-11 optimal
Endpoint Sharpness: Distinct color transition
Stability Constant: High with divalent metals
Purity Specifications
Assay: ≥95% active indicator
Water Content: ≤5%
Insoluble Matter: ≤0.1%
Heavy Metals: ≤0.001%
Stability Properties
Shelf Life: 3 years (dry storage)
Light Sensitivity: Store in dark containers
Solution Stability: Prepare fresh solutions
pH Degradation: Unstable in acidic pH

Performance Characteristics

Detailed performance metrics demonstrate AR Grade Eriochrome Black T superiority in complexometric titrations with exceptional endpoint detection, reliable color transitions, and reproducible results across diverse water hardness and metal analysis applications.

Endpoint Clarity

Transition: Sharp wine red to blue change

Exceptional endpoint visibility
Metal Selectivity

Binding: Selective Ca²⁺/Mg²⁺ indication

Superior metal detection
Titration Accuracy

Precision: ±0.1% hardness determination

Exceptional analytical precision
pH Tolerance

Working range: pH 9-11 optimal

Reliable alkaline performance
Batch Consistency

Variation: ±1% between batches

Outstanding lot-to-lot reproducibility
Reaction Speed

Response: Immediate color change

Rapid endpoint detection

Safety Information

Generally safe to handle with standard laboratory precautions. May cause mild eye and skin irritation. Use appropriate protective equipment including safety goggles and gloves. Avoid inhalation of dust and ensure adequate ventilation. Wash thoroughly after handling.

Mild Irritant
Eye Protection Required
Wash After Handling

Storage & Handling

Store in original containers in a cool, dry, dark place away from light and moisture. Keep containers tightly closed to prevent degradation. Prepare indicator solutions fresh or store for short periods only. Use amber glassware for light protection.

Cool, dry storage (15-25°C)
Protect from light
Prepare solutions fresh
Use amber glassware

Chemical Mechanisms & Reaction Pathways

Eriochrome Black T functions as a complexometric indicator through metal-chelation mechanisms, enabling precise EDTA titrations and water hardness determinations with predictable color transition pathways.

Metal Complexation

Forms stable 1:1 chelate complexes with Ca²⁺ and Mg²⁺ ions

Wine-red complex formation at pH 10
EDTA Displacement

Metal ions transferred from EBT to EDTA during titration

Blue endpoint indication mechanism
pH-Dependent Equilibrium

Optimal performance at pH 10 with ammonia buffer

Sharp color transition for accurate endpoints
Chelation Stability

Thermodynamically stable complex formation kinetics

Reliable indicator performance in water analysis

Regulatory Compliance & Documentation

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

ACS Specifications

American Chemical Society analytical reagent standards compliance

ISO 6059 Standard

International standard for water quality determination methods

ASTM Methods

American Society for Testing and Materials water analysis protocols

REACH Registration

European Union chemical regulation compliance

EPA Method Support

Validated for EPA environmental water analysis methods

SDS Documentation

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

Technical Support & Value-Added Services

DRAVYOM's analytical chemistry team provides comprehensive complexometric titration support, water hardness method development, and indicator optimization services for Eriochrome Black T applications.

Water Analysis Methods
  • Water hardness titration protocols
  • EDTA standardization procedures
  • Buffer system optimization
  • Endpoint detection training
Analytical Services
  • Indicator purity verification
  • Color transition validation
  • Complexometric method development
  • Titration accuracy assessment
Technical Support
  • Complexometric troubleshooting consultation
  • Indicator solution preparation training
  • Method transfer support
  • Quality control protocols
Supply Solutions
  • Consistent high-purity batching
  • Custom indicator concentrations
  • Light-protected packaging
  • Global analytical supply network

Environmental Impact & Sustainability

Our Eriochrome Black T production emphasizes environmental responsibility through sustainable organic synthesis practices, minimal waste generation, and comprehensive environmental impact management for analytical applications.

Clean Synthesis

Green chemistry principles in indicator compound production

Waste Minimization

Solvent recovery and purification byproduct management

Efficient Production

Optimized synthetic routes with minimal environmental impact

Safe Disposal

Comprehensive disposal guidance for indicator solutions

ISO 14001

Environmental management system certified production

Container Recycling

Glass container return and recycling programs

Manufacturing Excellence & Quality Control

DRAVYOM's specialized organic synthesis facility employs advanced purification technology with continuous quality monitoring to ensure consistent Eriochrome Black T purity and indicator performance across all production batches.

Synthesis Process

Multi-step organic synthesis with controlled azo coupling reactions

Precise pH control and temperature management
Quality Testing

18-point analytical testing including purity, moisture, and indicator performance

HPLC verification and colorimetric analysis
Quality Systems

ISO 9001:2015 quality management with analytical method validation

Continuous improvement and batch consistency
Packaging Control

Light-protected containers with moisture barrier closures

Stability preservation and contamination prevention

Market Applications & Performance Data

Comprehensive analytical laboratory data demonstrating Eriochrome Black T effectiveness across diverse complexometric applications with quantified performance metrics and method validations.

Water Analysis Applications
Endpoint Precision: ±0.05% RSD in hardness titrations Detection Range: 1-1000 mg/L CaCO₃ equivalent Color Transition: Sharp wine-red to blue change
Research Institutions
Method Publications: 400+ cited analytical procedures Reproducibility: >99.5% inter-lab agreement Innovation: Advanced complexometric protocols
Quality Control Labs
Reliability: 99.8% batch consistency Audit Success: 100% regulatory compliance Efficiency: 25% faster hardness determinations

DRAVYOM Competitive Advantages

Superior Indicator Performance

Consistently sharp color transitions with exceptional complexometric titration accuracy for water hardness determinations

Reliable Supply

Guaranteed availability with strategic inventory management and analytical-grade indicator production scheduling

Analytical Expertise

Dedicated complexometric chemistry team provides method development and water analysis troubleshooting support

Quality Assurance

Traceable certificates with comprehensive indicator performance data and complexometric method validation support

Global Standards

International compliance with ACS, ASTM, and EPA specifications for worldwide analytical acceptance

Partnership Approach

Collaborative relationships with water analysis laboratories and custom complexometric method development services