EP-RED will not give complete iron reduction in 24% or higher hydrochloric acid strength. It is likely to be ineffective in preventing iron induced sludging if 28% acid is required.

• 当盐酸浓度高过24%25时，EP-RED将不能发挥完全的降铁作用。当使用28%25浓度酸时，它已对降低铁渣失效。