Description
Specifications Table
Product Name – Sodium sulfite, anhydrous BAKER ANALYZED™ ACS reagent
Quantity/Pack Size – 500 g
Form – Powder
Grade – ACS Reagent
Application – Redox titrations, oxygen removal, analytical chemistry
Product Overview
Sodium sulfite anhydrous is a high-purity ACS-grade reagent designed for demanding laboratory applications where precision and consistency are critical. This white, crystalline powder offers exceptional solubility in water (25.4 g/100 mL at 20°C) and serves as a reliable reducing agent in redox reactions. With a minimum assay of 98%, it meets stringent ACS specifications for analytical procedures, ensuring accurate results in titrations and spectrophotometric analyses. The anhydrous form eliminates moisture-related variability, making it particularly suitable for applications requiring strict stoichiometric control. Its stability under normal storage conditions (cool, dry environment) preserves reagent integrity over extended periods. The compound’s ability to rapidly scavenge dissolved oxygen makes it valuable in preventing oxidative degradation in sensitive solutions. This reagent is manufactured under controlled conditions to minimize trace metal impurities, with typical heavy metal content below 0.001%, ensuring compatibility with trace analysis protocols. The fine particle size distribution facilitates rapid dissolution without clumping, while the low chloride content (<0.005%) prevents interference in halogen-sensitive assays. As a BAKER ANALYZED™ product, each batch undergoes rigorous quality testing to verify compliance with published specifications, providing researchers with confidence in their experimental reproducibility.
FAQs
1. What is the difference between anhydrous and hydrated sodium sulfite?
Anhydrous sodium sulfite contains no water molecules in its crystal structure, offering higher purity and more precise stoichiometry in reactions. The hydrated form (typically heptahydrate) contains approximately 55% water by weight, which may introduce variability in sensitive applications.
2. Can this reagent be used for food preservation applications?
While sodium sulfite has food-grade applications, this ACS reagent grade is specifically formulated for laboratory use. Food applications require compliance with different regulatory standards and may necessitate food-grade certification.
3. What is the typical shelf life when stored properly?
When stored in a tightly sealed container in a cool, dry environment away from direct sunlight, the reagent maintains its specified purity for at least 3 years from the date of manufacture. Exposure to moisture or air may reduce its effectiveness over time.
4. How does this compare to sodium bisulfite in reducing applications?
Sodium sulfite (Na₂SO₃) provides two sodium ions per molecule and has a higher reducing capacity per gram compared to sodium bisulfite (NaHSO₃). The choice depends on the specific pH requirements of your application, as bisulfite solutions are generally more acidic.
5. What safety precautions should be taken when handling this chemical?
Always wear appropriate personal protective equipment including gloves, goggles, and lab coat. Work in a well-ventilated area or fume hood, as the powder may irritate respiratory tracts. Avoid contact with strong acids, which can generate toxic sulfur dioxide gas.
