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Sodium
Persulfate 4101  Copper Etchant Sodium Persulfate is a good replacement for Ammonium Persulfate. Like Ammonium Persulfate crystals, they are used as an alternative to the traditional ferric chloride to produce a cleaner copper etchant solution. Mixed product must be stored in a vertical container. Directions Dilute
crystals slowly into 4 liters of water using a glass, plastic or stainless steel
container. Stir until completely dissolved. To make less than 4 litres, dissolve
250 grams per liter of water.
Available Sizes
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MSDS 
