Phenol Red (pH Indicator) – 5g

Phenol Red is a widely used pH indicator dye supplied in a convenient 5g pack, ideal for use in educational laboratories. Commonly employed in chemistry and biology teaching, phenol red provides clear and distinct colour changes across a specific pH range, making it highly suitable for classroom experiments and demonstrations.

Identified by CAS Number: 143‑74‑8, phenol red does not carry a UN number and is not classified as hazardous for transport when handled appropriately. It is typically used to monitor pH changes in aqueous solutions and biological media, supporting safe and effective practical learning.

Easy to prepare as an indicator solution and economical in use, Phenol Red is a staple reagent in school science departments, offering consistent performance and reliable visual results.

Key Features

• Phenol Red pH indicator dye
• 5g pack – suitable for multiple practical sessions
• Clear colour change across the pH 6.8–8.4 range
• CAS No: 143‑74‑8
• No UN number – non‑hazardous for standard handling
• Easy to prepare into aqueous indicator solutions
• Suitable for school laboratories and prep rooms

Ideal for School Science Lessons

Phenol Red is ideal for KS3, GCSE, and A‑Level science lessons, supporting both chemistry and biology curricula. Its clear colour transition makes it particularly effective for helping students visualise pH changes and understand acid–base behaviour.

• Investigating acids, alkalis, and neutralisation
• Teaching the use of pH indicators
• Monitoring pH changes in biological experiments
• Comparing different indicators and their transition ranges
• Developing students’ observation and practical skills

Reliable, easy to use, and curriculum‑relevant, Phenol Red (pH Indicator) is an essential laboratory reagent that supports clear understanding of pH and chemical change in school science education.