The semiconductor industry requires solvents with a very high degree of purity. After these solvents are used, they are just so much liquid waste to semiconductor firms. However, they may still be useful to firms in other industries.
在半導體業界，由於對溶劑純度的要求很高，有些使用過的溶劑對半導體廠商來說形同廢液，但對其他產業卻可能作為原料。