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Bromitimol Blue
Bromitimol Blue (Product Code: SCI-469/199) is an analytical reagent grade acid–base indicator dye, widely spelled bromothymol blue, used to show pH changes close to neutral in titrations and in carbon dioxide, photosynthesis and respiration experiments in school and college laboratories. Chemistry and biology teachers prepare indicator solution from this 25 g pack, which is supplied with an MSDS. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, a chemistry consumables supplier in India.
Specifications
| Parameter | Detail |
|---|---|
| Grade | Analytical reagent |
| Pack size | 25 g |
| Documentation | Supplied with MSDS |
| Shelf life | Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted. |
| Product code | SCI-469/199 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is Bromothymol Blue Used For?
Bromothymol blue is yellow in acid, blue in alkali and green around neutral, so it suits titrations whose end point falls near neutral, such as a strong acid against a strong base. It is also a quick way to check whether water samples or simple buffers are slightly acidic or slightly alkaline, and it earns a place in any acid base indicator kit used for comparing indicators.
In biology, blowing exhaled air through a dilute blue solution turns it green and then yellow as dissolved carbon dioxide forms carbonic acid. With pondweed sealed in indicator solution, tubes kept in light drift back towards blue as photosynthesis removes carbon dioxide, while tubes kept dark turn yellow from respiration. Dissolve the solid in a little ethanol or very dilute alkali before diluting with water.
Supplier
The indicator is sourced and supplied by Jain Scientific Equipments Private Limited under its ScienceLab name to schools, colleges and laboratories in India and international markets, with the MSDS enclosed. Because a small amount of solid makes a large volume of working solution, institutions often order it with other indicators, dropper bottles and pH papers on the same enquiry.
Company information is on the ScienceLab profile.
Related Laboratory Equipment
Indicators and accessories that pair with bromothymol blue:
- Universal pH Indicator — indicator paper for checking pH across the full scale.
- Phenolphthalein Solution — the indicator for titrations with an alkaline end point.
- Methyl Red (Indicator) — an acid-range indicator for side-by-side comparison.
- Glass Bottle, with Droppers — for storing and dispensing the prepared solution.
- Ethanol — a solvent for dissolving the solid indicator.
More reagents are in the Laboratory Equipment category.
Frequently Asked Questions
What grade and pack size is Bromitimol Blue SCI-469/199?
Bromitimol Blue SCI-469/199 is listed as an analytical reagent grade indicator in a 25 g pack and is supplied with an MSDS. It is the indicator widely known as bromothymol blue and is used to prepare indicator solutions in the lab.
What colour changes does Bromitimol Blue show?
Bromitimol Blue is yellow in acidic solution, blue in alkaline solution and green close to neutral. That makes it useful for titrations with an end point near neutral and for showing carbon dioxide dissolving in water in biology experiments.
How do I prepare indicator solution from Bromitimol Blue?
Dissolve a small amount of Bromitimol Blue in a little ethanol or very dilute sodium hydroxide, then dilute with distilled water until the colour is clear but not too dark. Store the solution in a labelled dropper bottle and follow the MSDS.
What is the shelf life of Bromitimol Blue?
Shelf life depends on the chemical, its grade and storage conditions, so no fixed period applies to Bromitimol Blue. Ask us for the expiry date of the batch you are quoted, and keep the pack closed, dry and away from light.
Who supplies Bromitimol Blue?
Bromitimol Blue is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India, which sources indicators, reagents and glassware for school, college and institutional laboratories in India and international markets.
What does a Bromitimol Blue quotation need?
For a Bromitimol Blue quotation, send the product code SCI-469/199, the number of 25 g packs and the delivery location through the contact page. Add any other indicators or dropper bottles you need so they can be quoted in one reply.
Request a Quote
Request Bromitimol Blue through the contact page or add it to the enquiry cart along with your other indicators, and we will send a quotation.
Last updated: 24 September 2026
