Phenolphthalein Solution Indicator
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Product Code : SCL-LC-12288
Phenolphthalein Solution Indicator (SKU SCL-LC-12288) is a ready acid-base indicator that stays colourless in acidic to near-neutral solutions and turns pink in alkaline ones. It is used to detect titration endpoints, show alkalinity and compare indicators in school and college chemistry. Science Lab Supplies provides it from Ambala, India, to schools, colleges, training institutes, tender contractors and distributors; it is usually ordered with a titration apparatus set or burette stand.
Specifications
The indicator is a solution of phenolphthalein, C20H14O4, in a bottle. Concentration and solvent are confirmed on the label for each batch; many such solutions are alcoholic and may be flammable, so storage and transport follow the Safety Data Sheet. Pack size is stated on the quotation.
| Parameter | Value |
|---|---|
| SKU | SCL-LC-12288 |
| Indicator | Phenolphthalein |
| Formula | C20H14O4 |
| CAS number | 77-09-8 |
| Molecular weight | 318.32 g/mol |
| Colour change | Colourless in acid to near-neutral; pink in alkali |
| Form | Solution in bottle; concentration and solvent on label |
| Pack size | Stated on the quotation |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for Phenolphthalein Solution Indicator
A few drops of the solution are added to the flask before titration, and the first lasting pink tint marks the endpoint when an alkali neutralises an acid. It is also used to show that a solution is alkaline. Add only the drops the method specifies, keep the bottle closed and away from flames.
- NCERT Class 10 science, Chapter 2: testing acids and bases with phenolphthalein.
- CBSE Class 11–12 practicals: titration of oxalic acid against sodium hydroxide with phenolphthalein.
- B.Sc. volumetric analysis: strong-acid and weak-acid titrations against alkali.
- Indicator comparison with methyl orange and litmus in introductory chemistry.
Standard Scope of Supply
You receive one bottle of Phenolphthalein Solution Indicator with a batch label, the Safety Data Sheet and transport documents. Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted. Concentration is shown on the label.
Packing, MOQ and Lead Time
Order a single bottle or a stock for a whole district of school laboratories; every quotation spells out packing, delivery time and price for the quantity asked. Burettes, alkalis and other indicators can be added so the full titration set is quoted at once.
Science Lab Supplies can ship to buyers in Zambia, Rwanda, South Africa, Qatar, Sri Lanka and Vietnam as a registered exporter with an Importer-Exporter Code. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). Please enquire via the contact page or the enquiry cart; the lab tender page covers tender supply.
Frequently Asked Questions
What colour does phenolphthalein show in alkali?
It turns pink in alkaline conditions and stays colourless in acidic to near-neutral solutions, which is why it is used to mark endpoints when an alkali is titrated against an acid.
Is the solution alcoholic?
The solvent is confirmed on the label of each batch. Many phenolphthalein solutions are alcoholic and may be flammable, so check the label and Safety Data Sheet before storage or transport.
Who supplies the Phenolphthalein Solution Indicator?
Science Lab Supplies supplies it from Ambala, India, in labelled bottles with the Safety Data Sheet, and it can be quoted alongside other school chemistry lab equipment in India.
Can it be used as a medicine?
No. This listing is for laboratory-use indicator solution only. It must not be used as a medicine, food additive, cosmetic ingredient or consumer product.
Related Indicators and Titration Reagents
An acid-base practical needs an indicator, an alkali and a standard acid, and classes often compare indicators side by side. These four items from the same Lab Chemicals range complete that bench and can be ordered with phenolphthalein on one quotation.
- Methyl Orange — acid-base indicator, red in acid, for titration comparison.
- Red Litmus Solution — turns from red to blue in alkaline samples.
- Sodium Hydroxide Flakes — strong alkali for titration and neutralisation.
- Oxalic Acid — reagent for titration and solution preparation.
Browse the full Lab Chemicals range or all school lab equipment.
Last updated: 25 September 2026
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