Description
Specifications Table
Product Name – Potassium nitrite, crystal BAKER ANALYZED™ ACS reagent
Quantity/Pack Size – 500 g
Form – Crystalline powder
Grade – ACS reagent
Application – Analytical chemistry, titration, standard solutions
Product Overview
Potassium nitrite (KNO₂) in crystalline form is a high-purity ACS reagent-grade chemical designed for precision in laboratory applications. With a minimum assay of 99%, this compound ensures reliable results in analytical procedures, particularly in redox titrations and standard solution preparations. The crystalline structure provides excellent solubility in water (approximately 281 g/L at 20°C), making it suitable for creating stable aqueous solutions. As an ACS-grade reagent, it meets stringent American Chemical Society specifications for purity, with controlled levels of impurities such as chlorides, sulfates, and heavy metals. The product is packaged in airtight containers to prevent oxidation and moisture absorption, maintaining its stability during storage. Its hygroscopic nature requires careful handling to avoid clumping, while its strong oxidizing properties necessitate proper storage away from organic materials. The white to slightly yellow crystals are free from visible particulates, ensuring consistency in experimental outcomes. This reagent is particularly valued for its role in diazotization reactions and as a preservative in certain biochemical applications.
FAQs
1. What is the shelf life of potassium nitrite crystals when stored properly?
When stored in a cool, dry place in its original tightly sealed container, potassium nitrite crystals typically maintain their specified purity for 2-3 years from the date of manufacture. Exposure to moisture or air can significantly reduce its effective shelf life.
2. Can this potassium nitrite be used for food preservation applications?
While potassium nitrite has food-grade applications, this specific product is ACS reagent grade and is not certified or recommended for food use. It’s formulated strictly for laboratory applications where high purity is required for analytical accuracy.
3. What safety precautions should be taken when handling these crystals?
Potassium nitrite is a strong oxidizer that can cause fire when in contact with combustible materials. Always wear appropriate PPE including gloves, goggles, and lab coat. Handle in a well-ventilated area and avoid inhaling dust. In case of skin contact, wash immediately with plenty of water.
4. How does the purity of this ACS grade compare to technical grade potassium nitrite?
ACS grade potassium nitrite has a minimum purity of 99%, with strictly controlled levels of impurities like chlorides (≤0.005%), sulfates (≤0.01%), and heavy metals (≤5 ppm). Technical grade typically has lower purity (90-95%) and higher impurity levels, making it unsuitable for precise analytical work.
5. What’s the recommended method for preparing a standard solution with these crystals?
For preparing a standard solution, first dry the crystals at 105°C for 2 hours if precise concentration is critical. Weigh the required amount using an analytical balance, dissolve in deionized water, and make up to volume in a volumetric flask. The solution should be stored in a dark bottle as potassium nitrite is light-sensitive.
