Persulfates should be stored in accordance with the National Fire Protection Association (NFPA) 400 Hazardous Materials Code. PeroxyChem personnel can provide additional support in reviewing storage facilities.
General Precautions — Persulfates should be kept in a cool, dry storage area, in a configuration that is appropriate for the sprinkler capacity of the building per NFPA 400.
Personnel should be trained to handle persulfates safely, properly dispose of spilled materials and prevent contamination.
If material gets wet or spills, it must be isolated and disposed of properly.
Handling — To remove and transport persulfates from the shipping containers, use clean plastic or stainless steel scoops, shovels, pails, etc. Cleanliness is essential.
Solution Storage — Aqueous solutions of ammonium persulfate are more susceptible to decomposition than the solid product. The recommended materials of construction for storage and conveyance equipment (tanks, pipelines, etc.) are 304 and 316 stainless steel. Other acceptable materials include polyvinyl chloride, polyethylene, Plexiglas® plastic (or other suitable generic), Teflon® resin (or other suitable generic), chemical stoneware, and glass. Metals other than 304 and 316 stainless steel cause decomposition of the persulfate solutions or may be corroded by them. This is particularly true of Monel, copper, brass, and iron.
Do not store or process persulfate solutions in sealed or closed containers or vessels. Normal solution decomposition will release oxygen gas which may overpressurize a sealed container and cause rupture.
Storage of persulfate solutions above 25°C will accelerate the rate of decompostition. See data on decomposition hazard and decomposition prevention.
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