Thymol Blue (pH Indicator) – 5g

Thymol Blue is a versatile pH indicator dye supplied in a convenient 5g pack, ideal for use in educational science laboratories. It provides two distinct colour‑change ranges, making it particularly useful for a wide variety of chemistry teaching applications where accurate pH observation is required.

Identified by CAS Number: 76‑61‑9 and with no UN number, Thymol Blue is not classified as hazardous for transport when handled appropriately. It is commonly prepared as an indicator solution and valued for its clear, reproducible colour transitions at different pH levels.

Supplied in solid form for extended shelf life, Thymol Blue allows technicians and teachers to prepare fresh indicator solutions as needed, supporting reliable and repeatable classroom experiments.

Key Features

• Thymol Blue pH indicator dye
• 5g pack – suitable for multiple practical sessions
• Two clear pH transition ranges for versatile use
• CAS No: 76‑61‑9
• No UN number – non‑hazardous for standard handling
• Supplied as a dry solid for long shelf life
• Suitable for school laboratories and prep rooms

Ideal for School Science Lessons

Thymol Blue is ideal for KS3, GCSE, and A‑Level chemistry lessons, especially when teaching acids, alkalis, and indicators. Its dual colour‑change ranges make it particularly effective for comparing indicator behaviour across different pH values.

• Teaching the use of pH indicators
• Investigating acid–base reactions
• Comparing different indicators and their transition ranges
• Supporting titration and solution chemistry experiments
• Developing students’ observation and analytical skills

Clear, reliable, and easy to use, Thymol Blue (pH Indicator) is a valuable teaching reagent that supports accurate pH measurement and strengthens students’ understanding of acid–base chemistry in school science education.