Description
Specifications Table
Product Name – Whatman Litmus Paper Blue
Quantity/Pack Size – 7MMx5M (Pack of 1), 10×20 (Pack of 1)
Form – Paper strips
Grade – Laboratory grade
Application – pH testing (acid-alkali detection)
Product Overview
Whatman blue litmus paper is a trusted laboratory-grade pH indicator designed for accurate acid-alkali testing. Each strip undergoes rigorous quality control to ensure consistent performance, providing clear color transitions within the 4.5?8.3 pH range. The high-absorbency paper substrate ensures rapid response when exposed to liquids or gases, making it ideal for quick qualitative analysis. Unlike generic litmus papers, Whatman?s formulation minimizes false positives due to its purified dye composition and uniform coating. The strips are individually cut for convenience and packaged to prevent contamination, preserving their sensitivity until use. Their non-bleeding properties ensure sharp color differentiation, even in low-concentration samples. Whether used in titration endpoints, environmental monitoring, or routine lab checks, these strips deliver reproducible results without requiring calibration. The compact pack sizes (7MMx5M and 10×20) cater to both small-scale experiments and bulk testing needs, while the acid-resistant backing prevents sample seepage. Store in a cool, dry place away from volatile chemicals to maintain longevity. For optimal accuracy, avoid touching the reactive zone and use within the expiration date printed on the packaging.
FAQs
1. How does Whatman blue litmus paper differ from red litmus paper?
Blue litmus paper turns red in acidic conditions (pH 8.3). Blue strips are specifically formulated to detect acids, offering higher sensitivity in the lower pH range compared to universal indicators.
2. Can this litmus paper be used to test gaseous samples?
Yes, the paper can detect acidic or alkaline vapors by holding it near the gas source. Moisten the strip slightly with distilled water for faster reaction, but avoid oversaturation, which may dilute the sample and skew results.
3. What is the shelf life of unopened Whatman litmus paper?
When stored in its original sealed packaging at room temperature (15?25?C), the strips retain accuracy for up to 24 months from the manufacture date. Exposure to humidity or direct sunlight accelerates degradation, so reseal the pack after each use.
4. Are these strips compatible with non-aqueous solvents?
The paper is optimized for water-based solutions. Organic solvents like ethanol or acetone may dissolve the dye or alter the color response. For non-aqueous testing, pre-wet the strip with deionized water before exposure to the sample.
5. How should I dispose of used litmus paper?
Used strips can be discarded as general lab waste unless contaminated with hazardous chemicals. If exposed to toxic substances, follow your institution?s chemical waste disposal protocols. Avoid flushing or incinerating, as residual dyes may release harmful fumes.
