Description
Specifications Table
Product Name – Ammonium persulfate, crystal BAKER ANALYZED™ ACS reagent
Quantity/Pack Size – 500 g
Form – Crystalline powder
Grade – ACS reagent
Application – Oxidizing agent, polymerization initiator, PCB etching
Product Overview
Ammonium persulfate is a highly pure, crystalline oxidizing agent meeting ACS reagent specifications, ensuring consistent performance in demanding laboratory applications. This stable, water-soluble compound decomposes into ammonium sulfate and oxygen, making it a reliable choice for polymerization reactions, PCB etching, and as a radical initiator in various chemical processes. Its high oxidation potential (E° = +2.05 V) enables efficient electron transfer reactions, while its compatibility with aqueous systems allows for easy handling and precise dosing. The BAKER ANALYZED™ certification guarantees strict quality control, with minimal impurities (<0.005% heavy metals) and a typical assay of ≥98.0%. The crystalline form provides excellent shelf stability when stored under recommended conditions, maintaining its reactivity over extended periods. As a non-volatile solid, it offers safer handling compared to liquid oxidizers, with a decomposition temperature of 120°C, allowing for controlled reaction initiation. The reagent's white crystalline appearance facilitates visual purity assessment, while its solubility (583 g/L at 20°C) enables rapid dissolution for immediate use in experimental protocols.
FAQs
1. What is the typical shelf life of ammonium persulfate when stored properly?
When stored in a cool, dry place with the container tightly sealed, ammonium persulfate maintains its specified purity for 12-18 months from the date of manufacture. The decomposition rate accelerates significantly above 30°C or in humid conditions.
2. How does the ACS grade differ from technical grade ammonium persulfate?
The ACS grade meets strict American Chemical Society purity standards with maximum allowable impurities of 0.005% for heavy metals and 0.01% for insoluble matter, while technical grade may contain higher levels of contaminants and has wider assay tolerances (typically 90-95%).
3. What safety precautions should be taken when handling this compound?
Always wear nitrile gloves, safety goggles, and a lab coat when handling. Work in a well-ventilated fume hood as decomposition releases oxygen gas. Avoid contact with organic materials, reducing agents, or metal powders to prevent violent reactions.
4. Can this be used as a substitute for potassium persulfate in applications?
Yes, ammonium persulfate can generally replace potassium persulfate in most applications, though you may need to adjust concentrations due to differences in molecular weight (228.20 g/mol vs 270.32 g/mol) and solubility profiles.
5. What is the recommended disposal method for unused material?
Dissolve in plenty of water and reduce with sodium metabisulfite solution before neutralizing with sodium bicarbonate. The resulting solution can be disposed of according to local regulations for non-hazardous chemical waste after confirming complete reduction.
