Indicator paper, bottle with 200 strips, phenolphtalein paper

Phenolphthalein paper is offered as indicator paper strips in a bottle of 200 strips for visual alkaline-range checks in laboratory practice. The strips show a white-to-pink colour transition and cover the pH interval 8,3–10,0, the classic working window associated with phenolphthalein indication. This makes the paper suitable for quick orientation around the weakly to moderately alkaline region during titrations, solution preparation, and process monitoring where a clear pink endpoint cue is helpful. Packaged as dry strips in a bottle, the product is easy to store and dispense for repeated single-use tests at the bench. These indicator papers from manufacturer filtraTECH support everyday wet-chemistry tasks without requiring meters for first-pass screening. Typical applications include checking the alkalinity of aqueous samples, confirming basic conditions before or after neutralisation steps, and instructional demonstrations of acid–base colour change. Handling remains simple: expose the strip to the sample, observe the white–pink response within the stated 8,3–10,0 range, and dispose of the used strip. Two hundred strips per bottle provide ample capacity for series work, shared teaching labs, and quality-control stations that keep phenolphthalein paper as a standard laboratory material for rapid visual pH indication.

This article is part of Test strips & indicator papers, in Test kits & water analysis.

Key features

• Pack size: bottle with 200 strips
• Product type: Phenolphthalein paper
• Indicator: Phenolphthalein
• pH range: 8,3–10,0
• Colour change: white–pink
• Format: Ready-to-use test strips