Ar Phenolphthalein
Analytical Indicator
Analytical Reagent

AR Grade Phenolphthalein Indicator

Analytical Reagent grade phenolphthalein indicator manufactured for acid-base titrations, pH determination, and analytical chemistry. Our AR grade phenolphthalein provides reliable colorimetric properties for research applications, analytical procedures, and precision endpoint detection.

  • Analytical Grade Purity
  • pH Range 8.2 - 10.0
  • Acid-Base Titrations
  • Research Laboratory Use
  • Sharp Color Change
  • Precise Endpoint Detection
Request Quote Technical Support

Technical Specifications

Chemical Formula: C₂₀H₁₄O₄
CAS Number: 77-09-8
EINECS Number: 201-004-7
Assay (Indicator Grade): ≥98.0% (AR Grade)
Physical State: White to pale yellow crystalline powder
Bulk Density: 0.40-0.60 g/cm³
Molecular Weight: 318.32 g/mol
Melting Point: 258-262°C
pH Transition Range: 8.2-10.0 (colorless to pink)
Solubility (ethanol): 18 g/L at 15°C
Water Content: ≤ 1.0%
Residue on Ignition: ≤ 0.05%
Chloride (Cl): ≤ 0.01%
Sulfate (SO₄): ≤ 0.02%
Heavy Metals (as Pb): ≤ 0.001%
Sensitivity: Sharp endpoint at pH 8.5-9.5
Color Change: Colorless (acid) to Pink (alkaline)
Packaging Options: 25g, 100g, 250g amber glass bottles

Applications

Acid-Base Titrations
pH Endpoint Detection
Alkalinity Measurements
Strong Acid Titrations
Analytical Chemistry
Pharmaceutical Analysis
Environmental Testing
Educational Laboratories
Quality Control
Volumetric Analysis
Solution Standardization
Reference Indicator

Industry-Specific Grades

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

AR Grade (Analytical Reagent)
Assay: ≥98.0% Residue: ≤ 0.05% Heavy Metals: ≤ 0.001% Application: General analytical procedures
ACS Grade
Assay: ≥98.0% pH Range: 8.2-10.0 Melting Point: 258-262°C Application: ACS analytical standards
Indicator Grade
Assay: ≥99.0% Sharp Transition: Yes Color Stability: Excellent Application: Precise titrations
USP Grade
Assay: 98.0-101.0% USP Monograph: Compliant Pharmaceutical Grade: Yes Application: Pharmaceutical testing

Quality Standards

DRAVYOM's AR Grade Phenolphthalein 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
≥98.0% Accurate Purity
Advanced Analytical Testing
Sharp pH Transition
Batch-to-Batch Consistency
Traceable Certificate of Analysis
Light-Protected Storage

Advanced Chemical Properties & Performance

AR Grade Phenolphthalein exhibits exceptional indicator properties essential for acid-base titrations. Its precise transition range and sharp endpoint make it the preferred choice for volumetric analysis requiring accurate pH determinations.

Indicator Properties
Transition Range: 8.2-10.0 pH units
pKa Value: 9.3 (25°C)
Color Change: Colorless to pink/magenta
Endpoint Sharpness: ±0.1 pH unit precision
Analytical Performance
Titration Accuracy: ±0.02% relative precision
Detection Limit: 0.01% w/v solution
Temperature Stability: 15-40°C working range
Solution Stability: 12 months in ethanol
Chemical Structure
Molecular Formula: C₂₀H₁₄O₄
Molecular Weight: 318.32 g/mol
Functional Groups: Phenolic hydroxyl groups
Solubility: Ethanol, slightly in water

Performance Characteristics

Performance metrics demonstrate Phenolphthalein superiority in alkalimetric titrations with exceptional endpoint precision, reliable color transitions, and reproducibility across diverse analytical procedures.

Endpoint Clarity

Detection: Sharp colorless-to-pink transition

Precise visual endpoint
Titration Precision

Accuracy: ±0.02% relative deviation

Superior analytical accuracy
pH Sensitivity

Range: 8.2-10.0 pH transition

Optimal alkaline detection
Solution Stability

Duration: 12 months in ethanol

Extended indicator viability

Safety Information

May cause eye and skin irritation. Avoid inhalation of powder and contact with mucous membranes. Use standard laboratory protective equipment including safety goggles, gloves, and lab coats. Ensure adequate ventilation when preparing solutions.

Eye Irritant
Skin Contact
Avoid Inhalation

Storage & Handling

Store in original containers in a cool, dry, dark place away from strong acids and bases. Keep containers tightly closed to prevent moisture absorption. Use clean, dry measuring equipment and prepare solutions in well-ventilated areas.

Cool, dry storage (15-25°C)
Protect from light exposure
Moisture-proof containers
Away from acids/bases

Chemical Mechanisms & Reaction Pathways

Phenolphthalein demonstrates distinctive pH-dependent structural transitions through lactone ring opening and quinonoid formation, enabling precise alkaline endpoint detection with sharp color changes in the pH 8.2-10.0 range.

Lactone Form

Colorless lactone structure stable in acidic and neutral solutions below pH 8.2

Acidic pH detection and starting point
Quinonoid Formation

Pink quinonoid ion formation through ring opening in alkaline conditions

Alkaline pH indication above pH 8.2
Equilibrium Transition

Reversible structural change enables precise endpoint determination

Sharp transition in pH 8.2-10.0 range
Visual Detection

Immediate color response enables accurate alkaline titration endpoints

Precise analytical determinations

Regulatory Compliance & Documentation

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

ACS Specifications

American Chemical Society analytical reagent standards compliance

ISO 3696 Standard

International standard for analytical grade reagent specifications

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 phenolphthalein performance in your specific alkaline titration applications.

Alkaline Titration Development
  • Titration protocol optimization
  • Indicator concentration guidance
  • Endpoint detection training
  • pH range optimization
Analytical Services
  • Indicator purity verification
  • Color transition analysis
  • pH range testing protocols
  • Method validation support
Technical Support
  • Titration troubleshooting consultation
  • Safe handling and preparation training
  • Laboratory protocol development
  • Quality control guidance
Supply Solutions
  • Consistent indicator quality batching
  • Emergency supply arrangements
  • Custom concentration solutions
  • Global distribution network

Environmental Impact & Sustainability

Our phenolphthalein production emphasizes environmental responsibility through sustainable manufacturing practices, waste reduction systems, and comprehensive environmental impact management for laboratory operations.

Organic Recovery

Advanced organic compound recovery and purification systems

Waste Minimization

Optimized synthesis reducing waste generation

Clean Production

Energy-efficient manufacturing with emission controls

Safe Disposal

Comprehensive neutralization and disposal 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 indicator manufacturing facility employs advanced synthesis technology with continuous monitoring systems to ensure consistent phenolphthalein quality and performance across all production batches.

Synthesis Process

Controlled phthalic anhydride condensation with precise purification protocols

Consistent color transition and pH sensitivity
Quality Testing

Multi-point pH validation including transition range and color assessment

Spectrophotometric verification and titration testing
Quality Systems

ISO 9001:2015 quality management with analytical laboratory accreditation

Continuous improvement and method validation
Packaging Control

Amber glass containers with light protection and stability preservation

Chemical stability and contamination prevention

Market Applications & Performance Data

Comprehensive analytical laboratory data demonstrating phenolphthalein effectiveness across diverse applications with quantified performance metrics and alkaline titration method validations.

Alkaline Titrations
Precision: ±0.05 pH units accuracy Transition: Sharp endpoint at pH 8.2 Stability: 18-month shelf life
Educational Institutions
Curriculum Support: 300+ educational protocols Reproducibility: >99% consistent results Safety: Low toxicity indicator
Quality Control Labs
Reliability: 99.9% batch consistency Efficiency: Quick visual assessment Accuracy: Precise endpoint detection

DRAVYOM Competitive Advantages

Superior Color Response

Consistently sharp color transitions with precise alkaline endpoints for accurate analytical determinations

Reliable Supply

Guaranteed availability with strategic inventory management and consistent production scheduling

Analytical Expertise

Dedicated analytical chemistry team provides alkaline titration method development and support

Quality Assurance

Traceable certificates with comprehensive pH validation and analytical method support

Global Standards

International compliance with ACS, USP, and analytical specifications for worldwide acceptance

Partnership Approach

Collaborative relationships with analytical laboratories and custom indicator development services