High Purity Phenolphthalein Indicator Solution Manufacturer,Supplier and Exporter in India

Product Code : SCL-CA-12677

The Phenolphthalein Solution Indicator is an acid–base indicator used for detecting alkaline conditions and identifying endpoints in suitable titrations. It is intended for chemistry teachers, laboratory technicians, researchers and supervised students. The solution provides a visible colour change from colourless to pink within its alkaline transition range.

Product Description

Phenolphthalein is an organic indicator compound with the molecular formula C₂₀H₁₄O₄. In ordinary acid–base work, it remains colourless in acidic and near-neutral solutions and develops a pink colour as the solution becomes sufficiently alkaline. Its commonly cited transition interval is approximately pH 8.2 to 9.8.

This product is supplied as a prepared indicator solution for controlled laboratory use. The concentration, solvent composition, capacity and shelf life must be confirmed from the product documentation. Suitable apparatus can be selected from the chemistry laboratory equipment range and chemical analysis equipment category.

Key Features

• Clear endpoint indication: Produces a visible colourless-to-pink change in suitable acid–base titrations.
• Defined alkaline transition: Phenolphthalein commonly changes colour at approximately pH 8.2 to 9.8.
• Prepared liquid format: Allows controlled dropwise addition without first dissolving solid indicator.
• Practical teaching value: Demonstrates indicator behaviour, neutralisation and pH-dependent colour change.
• Multiple laboratory applications: Supports suitable titrations, alkali detection and comparative indicator experiments.
• Specification-dependent performance: Concentration and solvent composition should be verified before analytical use.
• Controlled dispensing: Small quantities help reduce excessive indicator addition and endpoint distortion.

Technical Specifications

What's Included in the Kit

• One container of Phenolphthalein Solution Indicator in the confirmed capacity
• Product identity and hazard label as supplied
• Safety Data Sheet or Certificate of Analysis only when confirmed with the order

Applications and Uses

• Endpoint detection in suitable acid–base titrations
• Detection of alkaline conditions in laboratory samples
• Neutralisation and pH-indicator demonstrations
• Comparison of acid–base indicator transition ranges
• Supervised school, college and institutional chemistry practicals

How to Use the Phenolphthalein Solution Indicator

1. Read the label, Safety Data Sheet and approved experimental procedure.
2. Wear suitable eye protection, gloves and laboratory clothing.
3. Transfer the test solution into clean laboratory glassware.
4. Add only the number of indicator drops specified in the method.
5. Mix gently and observe the colour against a white background.
6. During titration, approach the endpoint slowly while swirling continuously.
7. Record the first persistent pale-pink endpoint when required by the method.
8. Close the indicator container immediately after use.

Safety note: Do not ingest the indicator or allow contact with the eyes or skin. The prepared solution may contain a flammable solvent; confirm its composition and handling controls from the current Safety Data Sheet.

Care & Maintenance

• Store the solution tightly closed under the conditions stated on its label.
• Protect it from contamination, excessive heat and direct sunlight.
• Use a clean dropper and never return dispensed solution to the container.
• Do not use expired, discoloured or incorrectly labelled solution.

Why Choose School Equipments India?

School Equipments India manufactures and supplies scientific and educational laboratory equipment from Ambala, India. Its range supports schools, colleges, laboratories and institutional procurement programmes. International buyers can review the wider laboratory equipment collection or submit capacity, concentration and documentation requirements through the product enquiry page.

Frequently Asked Questions

What is Phenolphthalein Solution Indicator used for?

It is used to detect alkaline conditions and identify endpoints in suitable acid–base titrations. It is also used in supervised neutralisation and indicator-colour experiments.

What colour does phenolphthalein produce?

Phenolphthalein is generally colourless in acidic and near-neutral solutions. It develops a pink colour within its alkaline transition range.

What is the pH range of phenolphthalein?

Its commonly cited indicator transition range is approximately pH 8.2 to 9.8. The observed endpoint can vary with solution conditions and the analytical method.

Can it be used for every acid–base titration?

No. An indicator must change colour near the expected equivalence-point pH. Phenolphthalein should be used only when its transition range is suitable for the selected titration.

Can students use phenolphthalein indicator?

Yes, during authorised laboratory practicals under qualified supervision. Students must follow the procedure and applicable solvent-safety requirements.

Is the indicator concentration specified?

The concentration, solvent, pack size and shelf life must be confirmed from the quotation, product label or accompanying documentation.

Request the verified capacity and formulation from School Equipments India, or browse the chemistry laboratory equipment category.

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