Phenolphthalein with CAS 77-09-8
What is Phenolphthalein?
Phenolphthalein is a premium quality pH indicator and analytical reagent widely used in acid-base titrations, laboratory analysis, and pharmaceutical applications. As a leading chemical supplier, Runtai Chemical provides high-purity Phenolphthalein (CAS 77-09-8) that meets international quality standards. Our Phenolphthalein powder exhibits excellent color transition properties, changing from colorless in acidic solutions (pH < 8.2) to pink-purple in alkaline solutions (pH > 10.0), making it an indispensable tool for analytical chemistry, quality control laboratories, and educational institutions worldwide.
Runtai Chemical is a professional and reliable China manufacturer of Phenolphthalein with CAS 77-09-8 with higher purity and lower price. If you are interested in our Phenolphthalein, PLS free to contact us for a free sample!
Product Advantages
- High Purity Grade: High purity ensures accurate and reliable results in analytical procedures and titrations.
- Sharp Color Transition: Clear and distinct color change from colorless to pink-purple provides precise endpoint detection in acid-base titrations with minimal error.
- Laboratory Grade Quality: Manufactured under strict quality control with low impurity levels, suitable for research, pharmaceutical testing, and analytical chemistry applications.
- Flexible Packaging Options: Available in multiple packaging sizes from 1kg bottles to 25kg drums to meet different application requirements and order quantities.
- Competitive Pricing: Direct manufacturer pricing with volume discounts available. Bulk orders welcome with favorable terms for distributors and long-term partners.
- Stable Quality: Consistent batch-to-batch quality with proper storage stability. Each lot comes with Certificate of Analysis (COA) and MSDS documentation.
Phenolphthalein Quick Details
- Chemical Name:Phenolphthalein
- CAS No.: 77-09-8
- EINECS:201-004-7
- Molecular Formula: C20H14O4
- Molecular weight: 318.32
- Appearance: White to yellow white powder
- Assay: 98%min
- Synonyms:1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-;1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-;2,2-bis(p-hydroxyphenyl)phthalide;3,3-bis(4-hydroxyphenyl)-1(3hChemicalbook)-isobenzofuranon;alpha-(p-hydroxyphenyl)-alpha-(4-oxo-2,5-cyclohexadien-1-ylidine)-o-toluicacid;alpha-di-(p-hydroxyphenyl)phthalide;Chocolax;componentofCorrectol
Phenolphthalein Typical Properties
| Item | Specifications | Results |
| Appearance | White or slightly yellow powder | Conform |
| Odor | odorless | Conform |
| Melting point℃ | 260-263 | 261.0-262.0 |
| The color of ethanol solution | Colorless | Conform |
| Chloride % | ≤0.01 | <0.01 |
| Sulfate % | ≤0.02 | <0.02 |
| Loss in drying % | ≤1.0 | 0.09 |
| Residue on ignition % | ≤0.1 | 0.05 |
| Heavy Metals（Pb）% | ≤0.001 | <0.001 |
| Assay % | 98.0-102.0 | 99.3 |
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Phenolphthalein Applications
- Acid-Base Titrations: Most common use as a pH indicator in volumetric analysis for determining the concentration of acids and bases. Ideal for strong acid-strong base titrations with clear endpoint detection.
- Pharmaceutical Testing: Used in pharmaceutical quality control for assay procedures, dissolution testing, and analytical method development in drug manufacturing and testing laboratories.
- Analytical Chemistry: Applied in various analytical procedures including water testing, soil analysis, food chemistry, and environmental monitoring where pH determination is required.
- Industrial Quality Control: Used in manufacturing quality control processes for chemical products, detergents, cleaning agents, and other industrial applications requiring pH monitoring.
- Agriculture & Soil Testing: Applied in soil pH testing and agricultural analysis to determine soil alkalinity/acidity levels for optimal crop growth and fertilizer recommendations.
- Water Treatment Analysis: Utilized in water quality testing laboratories for determining pH levels in drinking water, wastewater, and industrial water treatment processes.
Phenolphthalein Package & Storage
- Package:1kg/bag; 25kg/drum
- Storage: Store in a cool place and keep it sealed to avoid direct sunlight.
Hot tags
phenolphthalein, phenolphthalein powder, pH indicator, acid-base indicator, phenolphthalein supplier, CAS 77-09-8, laboratory reagent, analytical chemistry
