Description
Specifications Table
Product Name – Indicator paper, pH 5 – 7.5 Indicator
Quantity/Pack Size – 10 books
Form – Paper strips
Grade – Laboratory grade
Application – pH testing, qualitative analysis
Product Overview
This pH 5-7.5 indicator paper is engineered for precise acid-alkali detection in laboratory environments, offering a narrow yet critical pH range that covers weakly acidic to weakly alkaline solutions. The paper employs a colorimetric response system where distinct color transitions occur at 0.5 pH unit intervals, enabling accurate qualitative analysis without instrumentation. Each strip is impregnated with a proprietary indicator blend that ensures consistent performance across batches, minimizing variability in results. The paper’s rapid response time—typically under 2 seconds—makes it ideal for high-throughput testing scenarios. Its cellulose base is chemically inert, preventing interference with test samples while maintaining structural integrity even in humid conditions. The indicator formulation is optimized to resist fading, ensuring reliable readings for up to 30 seconds after application. Packaged in a moisture-resistant book format, the strips remain stable for extended periods when stored properly. The narrow pH range makes this product particularly valuable for applications requiring discrimination between subtle pH variations, such as buffer solution verification or environmental water testing where precise neutral-range measurements are critical.
FAQs
1. What is the shelf life of this pH indicator paper?
When stored in its original packaging at room temperature away from direct sunlight and moisture, the indicator paper maintains its accuracy for 24 months from the date of manufacture. The sealed book design helps preserve the reactive chemicals on the strips.
2. Can this paper be used for testing non-aqueous solutions?
The indicator paper is specifically formulated for aqueous solutions. Non-aqueous solvents may either fail to produce color changes or could potentially dissolve the indicator dyes, leading to inaccurate results or damage to the paper matrix.
3. How should I dispose of used indicator strips?
Used indicator strips should be treated as chemical waste, particularly if they’ve been in contact with hazardous substances. Collect them in a designated chemical waste container and follow your institution’s standard chemical waste disposal protocols.
4. Why does the color sometimes appear uneven on the strip?
Uneven color distribution typically occurs when the sample isn’t applied uniformly across the strip or when the paper isn’t fully saturated. For best results, briefly dip the entire reactive area into the solution rather than spot-applying with a pipette.
5. Is there a digital alternative that gives the same pH range coverage?
While digital pH meters can cover this range, they require calibration and maintenance. This indicator paper offers a portable, calibration-free alternative that’s particularly useful for field testing or when multiple simultaneous measurements are needed without instrument limitations.
