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 suits school and college chemistry for detecting titration endpoints, showing alkalinity and comparing indicators. Science Lab Supplies quotes it from Ambala, India, to schools, colleges, training institutes, tender contractors and distributors, on its own or with a titration apparatus set.
Specifications
The phenolphthalein table runs from formula and colour change to flammability, dosing and storage, one fact per row. In short, it is a bottled solution of phenolphthalein, C20H14O4, CAS 77-09-8; concentration and solvent are printed on each batch label, and because many such solutions are alcoholic, storage and transport follow the Safety Data Sheet.
| Specification | Value |
|---|---|
| SKU | SCL-LC-12288 |
| Indicator | Phenolphthalein |
| Formula | C20H14O4 |
| CAS number | 77-09-8 |
| Molecular weight | 318.32 g/mol |
| Colour in acid to near-neutral | Colourless |
| Colour in alkali | Pink |
| Form | Solution in a bottle |
| Concentration and solvent | Confirmed on the batch label |
| Flammability | Alcoholic formulations may be flammable; check the Safety Data Sheet |
| Dosing | Only the drops specified in the titration method |
| Dispensing | Clean dropper or dispensing cap; keep the bottle uncontaminated |
| Storage | Tightly closed; cool, dry, ventilated, away from heat and ignition sources |
| Waste | Institutional chemical-waste rules |
| Not for | Medicine, food additive, cosmetic or consumer use |
| Units per order | 1 x Phenolphthalein Solution Indicator bottle |
| Documents | Safety Data Sheet, batch label, shelf-life detail, transport documents |
| Pack size | Confirmed on the quotation |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for Phenolphthalein Solution Indicator
A few drops go into the acid in a graduated Conical Pot (Erlenmeyer) 250ml, measured with a Volumetric Pipette 5ml, and the first lasting pink tint marks the endpoint as alkali neutralises the acid. The solution also shows that a sample is alkaline. 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, shelf-life detail 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). Titration benches can be priced from a short note on the contact page or a basket of bottles and burettes in the enquiry cart; tender packs go through the lab tender page.
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 marks 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?
Labelled bottles are sent by Science Lab Supplies from Ambala, India, each with the Safety Data Sheet, and the indicator can be quoted beside other school chemistry lab equipment in India.
Can it be used as a medicine?
No. This indicator solution is for laboratory use only. It must not be used as a medicine, food additive, cosmetic ingredient or consumer product.
Related Indicators, Titration Reagents and Burette Ware
An acid-base practical needs an indicator, an alkali and a standard acid, a burette to deliver the titrant and a stand to hold it, and classes can compare indicators side by side. The items below complete that bench and can be ordered with phenolphthalein on one quotation.
- Methyl Orange — azo indicator with a transition range of about pH 3.1–4.4.
- Red Litmus Solution — changes from red to blue in basic samples.
- Universal Ph Indicator — testing paper covering pH 0–14.
- Sodium Hydroxide Flakes — NaOH strong alkali for neutralisation and titration.
- Oxalic Acid — also known as ethanedioic acid, for titration work.
- Burette for Bases — 50 ml glass, 0.1 ml divisions, Teflon or latex tap.
- Burette Stand With Fisher Clamp — holds up to two burettes at once.
Browse the full Lab Chemicals range, the Chemistry Lab range, or all school lab equipment.
Last updated: 22 October 2026
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