Ar Eosin
Analytical Histological
Analytical Reagent

Eosin

Analytical Reagent grade Eosin manufactured for histological staining, H&E staining, and microscopy applications. Our AR grade cytoplasmic stain provides reliable staining properties for tissue morphology studies, pathological examinations, and histopathology procedures in clinical diagnostics and research applications.

  • Analytical Grade Purity
  • H&E Staining
  • Cytoplasmic Counterstain
  • Histopathology
  • Clinical Diagnostics
  • Research Laboratory Use

Technical Specifications

Chemical Formula: C₂₀H₆Br₄Na₂O₅
CAS Number: 17372-87-1
Molecular Weight: 691.85 g/mol
Physical State: Red crystalline powder
Staining Properties: Cytoplasm staining (pink-red)
Solubility in Water: 44 g/100ml (25°C)
Solubility in Ethanol: 2.2 g/100ml (25°C)
pH Range: 6.5-7.5 (optimal staining)
Loss on Drying: ≤ 20.0%
Chloride (Cl): ≤ 0.5%
Sulfate (SO₄): ≤ 1.0%
Heavy Metals (as Pb): ≤ 0.002%
Staining Time: 1-3 minutes
Storage Conditions: Cool, dry place, protect from light
Packaging Options: 25g, 100g, 500g plastic bottles

Applications

Histological Staining
H&E Staining Protocol
Medical Education Labs
Clinical Pathology
Teaching Laboratories
Cytoplasm Visualization
Research Applications
Tissue Morphology
Quality Control Testing
Pharmaceutical QC
Diagnostic Pathology
Biological Studies

Industry-Specific Grades

DRAVYOM offers specialized Eosin grades tailored for specific histological and research requirements, ensuring optimal staining performance and regulatory compliance across diverse laboratory applications.

AR Grade (Analytical Reagent)
Purity: ≥ 85.0% Heavy Metals: ≤ 0.002% Staining Quality: Excellent Application: General histological procedures
Clinical Grade
Purity: ≥ 90.0% Sterility: Sterile filtered Documentation: Complete COA Application: Clinical diagnostics
Research Grade
Purity: ≥ 95.0% Consistency: Batch-to-batch Validation: Method verified Application: Advanced research work
Educational Grade
Purity: ≥ 80.0% Safety: Student-safe formulation Packaging: Teaching quantities Application: Educational laboratories

Quality Standards

DRAVYOM's AR Grade Eosin is manufactured under stringent quality control protocols, meeting international analytical standards including USP, BP, and clinical laboratory specifications. Our analytical-grade production ensures consistent staining performance and regulatory compliance.

ISO 9001:2015 Certified Manufacturing
USP/BP Grade Specifications
Consistent Cytoplasm Staining
Reliable H&E Performance
Clinical Laboratory Safety
Optimal Color Development
Traceable Certificate of Analysis
Light-Protected Storage

Advanced Chemical Properties & Performance

AR Grade Eosin exhibits exceptional staining properties essential for histological and cytological applications. Its ultra-pure composition ensures reliable performance in H&E staining, cytoplasmic visualization, and routine histopathology procedures requiring precise pink-red counterstaining.

Staining Properties
Stain Type: Acidic dye
Color: Pink to red staining
Binding Affinity: Cytoplasmic proteins
Differential Staining: Eosinophilic structures
Physical Properties
Appearance: Red-orange crystalline powder
Molecular Weight: 691.85 g/mol (Eosin Y)
Solubility: Water and ethanol soluble
Light Absorption: λmax ~517 nm
Histological Performance
H&E Compatibility: Perfect hematoxylin counterstain
Staining Time: 1-3 minutes optimal
Working pH: Slightly acidic conditions
Contrast Quality: High nuclear-cytoplasmic contrast
Purity Specifications
Dye Content: ≥90% active dye
Water Content: ≤8%
Insoluble Matter: ≤0.1%
Heavy Metals: ≤0.002%
Stability Properties
Shelf Life: 3 years (dry storage)
Light Sensitivity: Store protected from light
Solution Stability: 6 months working solution
pH Stability: Stable in acidic pH

Performance Characteristics

Detailed performance metrics demonstrate AR Grade Eosin superiority in histological staining with exceptional cytoplasmic visualization, reliable color consistency, and reproducible results across diverse histopathological and cytological applications.

Color Intensity

Staining: Brilliant pink-red coloration

Exceptional color quality
Contrast Quality

Differentiation: High nuclear-cytoplasmic contrast

Superior morphological detail
Staining Efficiency

Optimal time: 1-3 minutes staining

Rapid diagnostic procedure
H&E Compatibility

Perfect pairing: Optimal with hematoxylin

Standard histology protocol
Batch Consistency

Variation: ±2% between batches

Outstanding lot-to-lot reproducibility
Solution Stability

Working solution: 6 months stability

Extended laboratory use

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 working solutions fresh or store in amber bottles to maintain staining quality and color intensity.

Cool, dry storage (15-25°C)
Protect from light
Amber bottles for solutions
Protect from moisture

Chemical Mechanisms & Reaction Pathways

Eosin exhibits controlled fluorescent staining mechanisms through xanthene dye interactions, making it suitable for analytical applications requiring counterstaining in histopathology and fluorescence microscopy procedures.

Fluorescent Properties

Green fluorescence with excitation at 515 nm and emission at 544 nm

Distinctive fluorescent identification
Cytoplasmic Binding

Selective binding to protein components in cytoplasm

Specific cellular staining
pH-Dependent Color

Red-pink coloration in acidic to neutral conditions

pH-controlled staining intensity
Halogenation Effects

Bromine atoms enhancing staining properties and contrast

Enhanced visual differentiation
Counterstain Function

Complementary staining with hematoxylin for H&E procedures

Enhanced histological contrast

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

Histology Standards

Clinical laboratory histopathology method compliance

SDS Documentation

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

Technical Support & Value-Added Services

DRAVYOM's histopathology team provides comprehensive staining method support, troubleshooting assistance, and analytical services to optimize AR Grade Eosin performance in your specific diagnostic applications.

Staining Method Development
  • H&E staining protocol optimization
  • pH and timing adjustment guidance
  • Fluorescence microscopy techniques
  • Quality control procedures
Analytical Services
  • Certificate of Analysis verification
  • Custom fluorescence intensity testing
  • Staining specificity validation
  • Stability assessment
Technical Support
  • Histopathology 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 Eosin production emphasizes environmental responsibility through sustainable manufacturing practices, controlled halogenated dye management, and comprehensive environmental impact management for diagnostic laboratory operations.

Halogen Safety

Controlled bromine handling with safety containment systems

Waste Minimization

Optimized concentrations reducing fluorescent dye usage

Clean Production

Energy-efficient synthesis with emission controls

Wastewater Treatment

Advanced treatment of xanthene dye wastewaters

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 fluorescent dye synthesis technology with continuous monitoring systems to ensure consistent AR Grade Eosin quality and performance across all production batches.

Production Process

Controlled synthesis with high-purity fluorescein and bromination

Precise fluorescence and staining quality control
Quality Testing

16-point analytical testing protocol including fluorescence and staining specificity

Spectrofluorometric verification and performance testing
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

Fluorescence stability preservation and contamination prevention

Market Applications & Performance Data

Comprehensive diagnostic laboratory data demonstrating AR Grade Eosin effectiveness across diverse applications with quantified performance metrics and histopathological method validations.

Fluorescence Performance
Excitation maximum: 515 nm wavelength Emission maximum: 544 nm green fluorescence Quantum yield: 0.65 fluorescence efficiency
H&E Staining
Cytoplasm contrast: Excellent pink-red staining Nuclear complement: Perfect with hematoxylin Penetration: Effective in 3-5 μm sections
Staining Conditions
pH optimum: 4.5-6.5 for best contrast Concentration: 0.1-1% working solutions Time: 2-10 minutes staining duration
Validation Data
Method validation: Clinical histopathology standards Stability: 36+ months proven shelf life Reproducibility: <2% RSD staining intensity

DRAVYOM Competitive Advantages

Superior Fluorescence

High quantum yield ensuring bright, consistent fluorescence

Histological Excellence

Optimal cytoplasmic contrast for H&E staining

Clinical Standards

Histopathology laboratory compliant with comprehensive documentation

Light-Protected Supply

UV-protected supply chain maintaining fluorescence integrity

Pathology Expertise

Support team with histopathology and fluorescence specialists

Safety Management

Controlled halogenated dye handling with comprehensive safety protocols