Product Short Description: Methanol wall wash test is performed to determine the cleanliness and suitability of cargo tanks or compartments on a marine vessel prior to loading of high quality requirement like polyester grade monoethylene glycol. Product Description: Significance and Use The methanol wall wash test is performed to determine the cleanliness and suitability of cargo tanks or compartments on a marine vessel prior to loading of high quality requirement like polyester grade monoethylene glycol. As it is adversely affected by oxygen, hydrocarbons, water and chloride.