Phenolphthalein Solution Indicator

Product Code : SCL-LC-12288

The Phenolphthalein Solution Indicator is an acid-base indicator reagent used for supervised chemistry experiments, titration endpoint detection, alkalinity observation, pH-range demonstrations, and qualitative classroom analysis. It is suitable for schools, colleges, chemistry laboratories, science departments, institutional tenders, distributors, and educational procurement buyers.

Product Description

Phenolphthalein Solution Indicator from Science Lab Supplies is intended for controlled educational and laboratory use where a clear visual endpoint is required in acid-base practicals. The exact concentration, solvent system, pack size, bottle type, batch number, shelf life, SDS, and COA must be confirmed before final quotation or publication.

Phenolphthalein is commonly represented as C₂₀H₁₄O₄. It is widely used as a pH indicator because it remains colourless in acidic to near-neutral conditions and turns pink in alkaline conditions. This page describes laboratory-use indicator solution only, not pharmaceutical, food, cosmetic, supplement, or consumer use.

Key Features

• Acid-base indicator: supports supervised titration and alkalinity demonstrations.
• Clear colour endpoint: commonly changes from colourless to pink in alkaline conditions.
• Formula reference: phenolphthalein is represented as C₂₀H₁₄O₄.
• Practical teaching value: useful for endpoint recognition, neutralisation lessons, and pH indicator comparison.
• Formulation verification: concentration and solvent must be confirmed from the final product label.
• Safety-led handling: alcoholic formulations may be flammable and must be checked against the SDS.
• Documentation-led procurement: SDS, COA, batch number, grade, and shelf-life details should be verified before use.

Technical Specifications

What's Included in the Kit

• 1 × Phenolphthalein Solution Indicator bottle
• Safety Data Sheet, Certificate of Analysis, batch label, expiry/shelf-life detail, and transport documents

Applications / Uses

• Detecting endpoints in approved acid-base titration practicals
• Teaching neutralisation, alkalinity, and pH indicator behaviour
• Comparing phenolphthalein with methyl orange, litmus, and universal indicator
• Supporting classroom demonstrations where a pink alkaline endpoint is required
• Preparing observation records for chemistry practical notebooks
• Supporting tender-based procurement for chemistry lab indicator reagents

How to Use the Phenolphthalein Solution Indicator

1. Read the current SDS, product label, and institutional risk assessment before use.
2. Confirm the concentration and solvent before issuing it for practical work.
3. Add only the number of drops specified in the approved titration method.
4. Swirl the solution gently and observe the endpoint under adequate lighting.
5. Record the colour change only when it matches the method requirement.
6. Close the bottle immediately after use to reduce evaporation and contamination.
7. Dispose of used solutions according to institutional chemical-waste rules.

Safety note: Use Phenolphthalein Solution Indicator only in supervised laboratory procedures. Do not ingest, inhale vapour, use medically, store near flames, or issue for unsupervised student handling.

Care & Maintenance

• Store tightly closed in a cool, dry, ventilated chemical-storage area.
• Keep away from heat, ignition sources, food items, unlabelled containers, and incompatible chemicals.
• Use a clean dropper or dispensing cap and avoid contaminating the original bottle.
• Maintain SDS, COA, batch number, concentration, solvent, pack size, and shelf-life records.

Why Choose Science Lab Supplies

Science Lab Supplies manufactures and exports scientific laboratory instruments, lab experiment setups, science kits, mathematics kits, didactic models, and STEM models. Its lab-chemical range supports chemistry laboratories with reagents, salts, acids, bases, solvents, and indicators for institutional and tender requirements. The brand supplies educational laboratory products for schools, colleges, distributors, and export buyers, with chemical documentation to be verified for each shipment.

Frequently Asked Questions

What is Phenolphthalein Solution Indicator used for?

Phenolphthalein Solution Indicator is used for supervised acid-base titrations, endpoint detection, alkalinity demonstrations, and pH indicator teaching.

What colour does phenolphthalein show in alkali?

Phenolphthalein is commonly colourless in acidic to near-neutral conditions and turns pink in alkaline conditions.

What is the formula of phenolphthalein?

The formula of phenolphthalein is C₂₀H₁₄O₄. Its CAS number is 77-09-8 and its molecular weight is 318.3228 g/mol.

Is the solution alcoholic?

The solvent is not confirmed. Many phenolphthalein indicator solutions are alcoholic, so the final label and SDS must be checked before storage or transport.

Is it suitable for school chemistry labs?

Yes. It is suitable for supervised school and college chemistry laboratories when trained staff control dispensing, titration use, storage, and disposal.

Can it be used as medicine?

No. This listing is for laboratory-use Phenolphthalein Solution Indicator only. It should not be used as medicine, food additive, cosmetic ingredient, or consumer product.

For related chemistry procurement, explore lab chemicals, Red Litmus Solution, chemistry lab equipment, and science lab equipment.