We have a batch process operating at a temperature of 180C and a pressure of 5 bar and where one of the components is sodium hydroxide. Actually, we purchase solid sodium hydroxide and dissolve it manually. We are intending to purchase dissolved sodium hydroxide (50%) but we were informed that this product has traces of sodium chloride. Which is the maximum allowed concentration of sodium chloride that will not affect our equipment which is made of 316 stainless stell?
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