In the chemical industry, distinguishing between similar-sounding compounds is essential for selecting the correct material for a specific application. Sodium Pyrosulfate (CAS 13870-29-6) and Sodium Persulfate, while both sodium salts of sulfate derivatives, have distinct chemical structures, properties, and primary uses. Understanding these differences is key for procurement managers, R&D scientists, and formulators.

Sodium Pyrosulfate, with the chemical formula Na2O7S2, is essentially the disodium salt of disulfuric acid. It typically presents as a white powder and is primarily known for its role as an acidic melting agent, utilized in metallurgical processes to lower the melting point of ores. Its high assay, often u226595.85%, signifies a stable inorganic salt. When considering where to buy Sodium Pyrosulfate, focusing on manufacturers with consistent quality and product specifications is important.

In contrast, Sodium Persulfate, chemically Na2S2O8, is the disodium salt of peroxydisulfuric acid. This compound is a powerful oxidizing agent. Its applications are quite different, often including use as a bleaching agent, a polymerization initiator, and in environmental remediation. Sodium Persulfate decomposes more readily than Sodium Pyrosulfate, particularly when exposed to heat or certain catalysts, releasing oxygen and acting as a strong oxidant.

The key difference lies in their core functionality: Sodium Pyrosulfate is an acidic melting agent and flux, whereas Sodium Persulfate is a potent oxidizing agent. This distinction dictates their respective applications in industries ranging from metallurgy to polymer production and cosmetics. For formulators or researchers needing an acidic compound for melting or fluxing, Sodium Pyrosulfate is the appropriate choice. Conversely, for applications requiring oxidation, bleaching, or radical initiation, Sodium Persulfate is indicated.

When sourcing these chemicals, it’s important to be precise in your requests. If you need to buy Sodium Pyrosulfate, ensure the CAS number 13870-29-6 is specified. If Sodium Persulfate is required, the CAS number is typically 7775-27-1. Partnering with a reputable sodium pyrosulfate manufacturer or a supplier dealing with a range of inorganic salts ensures you get the correct chemical for your needs, backed by quality assurance and competitive sodium pyrosulfate price points.

In conclusion, while both are sodium salts of sulfur-oxygen anions, Sodium Pyrosulfate and Sodium Persulfate serve very different industrial purposes. Understanding their unique properties and applications, and clearly specifying your requirements when purchasing from a Chinese supplier, is paramount for successful procurement and effective use.