Description
Specifications Table
Product Name – Phenolphthalein indicator powder
Quantity/Pack Size – 100 g
Form – Powder
Grade – ARS, ACS
Application – pH indicator, titration
Product Overview
Phenolphthalein indicator powder is a high-purity, synthetic dye widely used in analytical chemistry for precise pH detection. This ARS and ACS-grade powder ensures consistent performance, transitioning from colorless in acidic solutions (pH 10). Its sharp color change at the neutral pH range makes it indispensable for acid-base titrations, where accuracy is critical. The powder form allows for easy dissolution in alcohol or water, depending on the application, ensuring flexibility in lab protocols. As a non-toxic, stable compound, it maintains reliability over time when stored properly in a cool, dry environment. The ACS grade guarantees compliance with stringent purity standards, while the ARS designation ensures suitability for research-grade applications. Whether used in volumetric analysis or qualitative testing, this indicator delivers reproducible results, minimizing errors in experimental workflows. Its compatibility with standard lab equipment and reagents further enhances its utility across diverse chemical processes.
FAQs
1. What is the shelf life of phenolphthalein indicator powder?
When stored in a tightly sealed container away from light and moisture, phenolphthalein indicator powder retains its efficacy for up to 3–5 years. Degradation may occur if exposed to humidity or extreme temperatures.
2. Can this powder be used in non-aqueous titrations?
Yes, phenolphthalein is soluble in ethanol and other organic solvents, making it suitable for non-aqueous titrations. Ensure the solvent is compatible with your sample and does not interfere with the color transition.
3. How does phenolphthalein compare to other pH indicators like methyl orange?
Phenolphthalein has a narrower transition range (pH 8.3–10.0) and is ideal for strong acid-strong base titrations, while methyl orange (pH 3.1–4.4) suits acidic titrations. Choose based on your sample’s expected pH range.
4. Is this product compatible with automated titration systems?
The powder can be prepared as a solution for automated systems, but ensure the instrument’s optical sensors are calibrated for phenolphthalein’s pink endpoint. Pre-dissolved liquid indicators may offer better convenience for automation.
5. What precautions should be taken while handling phenolphthalein powder?
While non-toxic, avoid inhalation or direct contact with skin/eyes. Use in a well-ventilated area or fume hood, and wear gloves if handling large quantities. Dispose of waste as per local chemical safety guidelines.
