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Chiral Intermediates
CAS NO:
77-09-8
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APIs for Digestive System Drugs
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Lubricants
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Slice Machine
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APIs for Respiratory System Drugs
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Antipyretic and Analgesic Preparations
Glidants / Anti-caking Agents
Heat Exchanger
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Fine Chemicals
Crushing equipment
Ultrapure Water System
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Energy-saving and Low-carbon Equipment
Other Intermediates
Antiparasitic Preparations
Coating Agents
Storage Tanks, Containers
Herbal medicine Extraction Equipment
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Other Refrigeration Equipment
Drive Equipment
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Solution Preparation System
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APIs for Hormones and Regulatory Drugs
Other Natural Products
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APIs for Antiparasitic Drugs
Anti-Allergic Formulations
Plasticizer
Evaporating Equipment
TCM Cooking Equipments
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Reducers
Laboratory Engineering
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Membrane Module
APIs for Antipyretic and Analgesic Drugs
Anti-Tuberculosis and Anti-Leprosy Formulations
Surfactant
Distillation Equipment
Drop Pill Equipment
Purifying Engineering
VFD (Variable Frequency Drive)
Other preparation equipment
Distilled water machine
Laboratory Solutions
Vitamin
Digestive System Preparations
Centrifuge
Screening Machine
Honey Pill Machine
Flooring Materials
Bearing
Emulsifiers
Ion-exchange equipment
Online Process Control
Respiratory System Preparations
Sterilizing Equipment
TCM Deposition Equipment
Spare Part
Other Cleaning System
Stainless Steel
Nervous System Preparations
Filter press equipment
Herbal medicine Fermentation Equipment
Plastic
Containment System
Special Active Ingredients
Ointment Bases
Homogenizer Equipment
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Others Parts and Components
APIs for Veterinary Drugs and Feed Additives
Anaesthetic and Adjuvant Formulations
Air Filter
Suppository Bases
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Blood System Formulations
Cleanroom Consumables
Glass lining equipment
Film-forming Agents
Urinary and Reproductive System Formulations
Other API Machinery and Equipment
Filter Paper
Release Modifiers
Immunomodulatory Formulations
Filter Paper Board
smotic Pressure Regulators / Tonicity Adjusting Agents
Water, Electrolyte, and Acid-Base Balance Regulating Formulations
Ph Control Agents
Nozzle, Tank Cleaning Machine
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Antioxidants / Antioxidant Synergists
Fluid Equipment
Enzyme and Other Biochemical Formulations
Antimicrobial Preservatives (Preservatives)
Tonic and Nutritional Formulations
Complexing Agents (Chelating Agents / Inclusion Compounds)
Hormonal Formulations
Dermatological Preparations
Other Preparations
Co-solvents
ENT Preparations
Penetration Enhancers (Transdermal)
Freeze-drying Protective Agents
Refrigerants / Cryogens
Capsule
Fragrances
Adsorbents
Pressure-sensitive Adhesives (PSA)
Stiffening Agents
Carriers for Dry Powder Inhalers (DPI Carriers)
Other Excipients
Pipes and Pipe Fittings
Vacuum Equipment
Air Compressor
Compressor
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Prefillable Syringes
Filters
Filter Presstem
Filtration System
Filter Bag
Filter Mesh
Filter Cloth
Filter Membrane
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Sanitary Pressure Vessel
Hyaluronic Acid
Collagen
Botulinum Toxin
Peptide
Other Injection Raw Materials and Ingredients
Ceramide
Ectoin
Niacinamide
Asiaticoside
Ergothioneine
Chitosan
Other Active Ingredients
Chiral Intermediates
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Microfiltration
Ultrafiltration
Auxiliary Equipment
Separation equipment
Metered Dose Inhalers
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Central Nervous System Drugs
Reagents for Biopharmaceuticals
Drug Target Discovery and Validation
Plant Extracts
Animal Extracts
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Ointment Filling-sealing Machine、Vacuum Mixer
Eye Drug Machinery
Soft Gelatin Capsule Machinery
Tablet Press
Pneumatic Cracker
Granulator
Labelers, Label Printers
Bag Packaging Machine
Thermostatic / Heating / Drying Equipment
Chromatography
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Tabletop
Glass bottles & Vials
Fermentation Products
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Mixing Tank/Blender
Bioreactor
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PCR
Recombinant Collagen
Alkaloids
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Peptides
Balances / Weighing Scales
Online Gas Chromatography
Cephalosporins
Anesthetics
Immunology Reagents
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Pharmaceutical Chemistry
Formulation Design
Regulatory and Compliance Consulting
Syrup Machinery
Injection Medicine Machinery
Hard Capsule Filling Machine
Coating Machine
Medicine Material Grinding Machine
Lettering machine
Box Packaging Machine
Mass Spectrometry
Laboratory Bench
Aluminum Foil
Rheometers / Viscometers
Chemical Reagents
Cleaning & Disinfection Equipment
Granulator
Emulsifier
Biological Fermentation System
Injection Molding Equipment
Exosome
Phospholipids
Prostaglandins
Veterinary Biologics
Chemical Reagents
Therapeutic Biological Products
Biochemical Reagents
Antibodies
Natural Pigments
Animal Lipids
Enzyme Preparations
Flowmeters
Online Particle Size Analyzer
Tetracycline
Amino Acids and Derivatives
Process Optimization and Testing
Nucleic Acids and Derivatives
Pre-Clinical Research
Chemical/Biological API Manufacturing
Powder Filling Machine
Oral Liquid Machinery
Low Temperature Pulverizer
Strapping machine
Paper Film Packaging Machine
Thermal Analyzers
Spectrometers
Other Measurement and Metrology Instruments
Storage Cabinets
Plastic Bottles
Other Industrial Process Control and Online Analytical Instruments
Certification
Feed Additives
Diagnostic Biological Products
Pulverizer
Coating Machine
Capsule Filling Machine
Other Mixing Equipment
Cell Engineering Equipment
Pre-filled Syringe Production Equipment
Purification Equipment
Electrophoresis/Gel Imaging/UV Detection
Regenerative Materials
Other Fine Chemicals
Cell Biology Reagents
Biological Consumables
Feed Additives
Soft Mist Inhaler
Plant Polysaccharides
Animal Proteins
Microbial Polysaccharides
Aminoglycoside
Enzymes
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Market and Business Strategy Consulting
Suppository Drug Machinery
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Printing Device
Blister Packaging Machine
Environmental Test Chambers
Moisture Analyzer
Air Discharge Equipment
Rubber Stopper
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Capsule Production Line
Isolator
Synthesis/Reaction Equipment
Microbial Detection Instrument
Composite Biomaterials
Animal Breeding Auxiliary Products
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Preclinical Research Services
Nebulizer
Essential Oils
Animal Polysaccharides
Bioactive Functional Ingredients
Macrolides
Microbial / Fermentation Reagents
Proteins
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Formulation Development and Manufacturing
Other Services
Medicine Film Drug Machinery
Infusion Medicine Machinery（中文站有输液剂机械的三级分类）
Pharmaceutical Machine Milling
Instruction Booklet Folding Machine
Fan
Chromatography Consumables and Accessories
Other Physical Properties Testing Instruments
Gasket
Sample Preparation / Digestion Equipment
X-ray Structure Analysis
Safety Cabinet
Counting Machine (Tablet)
Other Capsule Filling Equipment
Disposable Biotechnology Equipment
Vacuum Packaging Machine
Laboratory Low-temperature Storage
Other Innovative Materials
Other Veterinary
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Sulfonamides
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Computational Chemistry and AI-Assisted Drug Design
Clinical Trial Drug Manufacturing
Aerosol Drug Machinery
Super Micro Mill
Bottle Conveyer
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Trays
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Centrifugal Separation System
Automatic Packaging Machine
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Chip System/Accessories
Cytokines
Counting Machine
Cartridge Vial
Medicinal Herbs
Bee Products
Chloramphenicols
Testing
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Medicine Filling Machine
Disk Type Bottle Straightening Machine
Lidding Materials
Other Crushing Equipment
Ultrafiltration/Microfiltration System
Horizontal Pillow Packaging Machine
Cartoning Machine
Auto-injector
Transfection/Cell Fusion
Track & Trace
Gas Generators / Gas Handling Equipment
Blood Products
TCM Ingredients & Slices
Animal Medicinal Materials
Lincomycin
Microbial Products
Bottle Washer
Vial Sealing Machine
Liquid Handling Equipment
Hoses and Fittings
Other Biopharmaceutical Equipment
Vertical Packaging Machine
Casing Machine
Microplate Reader/Enzyme Labeling Instrument
Analysis and Validation
Serialization System
Pen Injector
Other Anti-Infective Drug
Other Pharmaceutical R&D Outsourcing
Conveyer For Medicine Material
Spray Pump
Other Injectable Equipment
Aluminum Foil Packaging Machine
Coding Machine
Cell Analysis
Automated Assembly
Other Laboratory General Equipment
Packaging Bag Valve
Freeze Dryer
Granule packaging machine
Other Drug Delivery Device Accessories
Biological Microscope/In Vivo Imaging
Other Antibiotics
Cap Screwing Machine
Nasal Drug Delivery Devices / Nasal Spray Pumps
Printing Services
Liquid Packaging Machine
Laboratory Automation
Screw Capping Machine
Lamp Inspection Machine
Ophthalmic Drug Delivery Devices / Eye Drop Delivery Systems
Labelling
Powder Packaging Machine
Synthesizer
Heat Shrink Packaging Machine
Metal Detector
Insulin Pens / Blood Glucose Management Devices
Security Taggants & Markings
Filter Cartridge
Tablet Packaging Machine
Animal Experiment Instrument
Injection & blow molding machines
Batching system
Self-Injection Systems / Safety Protection Devices
Incubator Equipment
Printed Drugs Packaging
Box filling & sealing machine
Palletizing equipment
CIP cleaning system
Topical / Gynecological / Intimate Drug Delivery Devices
Desiccants
Other Life Science Instrument
Bottle Filling Line
Contaners
Lifting Charging Machine
Others
Inhalant Packaging
BFS Bottlepack Machine
Weighting Equipment
Blister Packaging Machine
Pharmaceutical Paper
Other Pharmaceutical Outer Packaging Equipment
Packaging bag valve
Container Sealing Machine
Glass Tube
Multi-functional Bottle Packaging Machine
Medical Aesthetic Freeze-Dried Powder Vials
Sachets Cartoner Packing line
Primary Packaging
Other Pharmaceutical Inner Packaging Equipment
Aluminum Caps & Aluminum-Plastic Combination Caps
Sterile Bags / Breathing Bags / Sterilization Bags
Medical Device Packaging / Bioconsumables Packaging
Dispensing Bottles
Blister Packaging
Pharmaceutical Plastic Films / Composite Film Bags
Accessories
Ampuls
Other Packaging Materials
Basic Info
CAS Number
77-09-8
Pharmacopoeia
In-house Standards
Grade
Pharmaceutical Grade
Is Manufacturer
No
Samples Provided
NO
Product Description
/
AI Product Description
*The following content is generated by AI and is for reference only.
Phenolphthalein, chemically known as 3,3-bis(4-hydroxyphenyl)-2-benzofuran-1(3H)-one, is a widely utilized organic compound with the molecular formula C₂₀H₁₄O₄. Its distinctive Chemical Abstracts Service (CAS) registry number is 77-09-8. This white or slightly yellow crystalline powder is renowned for its unique acid-base indicator properties, which have made it a staple in analytical chemistry laboratories worldwide for over a century. The compound remains colorless in acidic and neutral solutions but undergoes a dramatic transformation to a vivid pink or magenta hue when exposed to alkaline environments with a pH typically ranging between 8.2 and 10.0. This sharp color transition allows scientists to precisely determine the endpoint of titration reactions, particularly in strong acid-strong base analyses where visual detection of neutrality is critical. Beyond its primary role as an indicator, phenolphthalein has historical significance in various industrial applications, including its former use as a laxative in medical formulations, although this application has been largely discontinued due to safety concerns regarding potential carcinogenicity and genotoxicity. In modern contexts, it serves as a crucial reagent in forensic science for detecting blood traces and in educational settings to demonstrate chemical equilibrium principles. While its use in food coloring was banned by the FDA in the 1960s following toxicity studies, it remains essential in quality control processes within the pharmaceutical and chemical industries. Researchers must handle phenolphthalein with appropriate safety precautions, utilizing personal protective equipment to avoid skin contact and inhalation, given its classification as a possible human carcinogen. Despite regulatory restrictions on specific uses, its fundamental importance in understanding pH dynamics ensures its continued presence in scientific literature and laboratory protocols globally.
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