The content is up to standard, and "up to standard" means "up to standard". Different standards have different contents.

In the popular saying before, the purity of refined alcohol in methanol was described as "three nines" (99.9%).

At present, the national industrial methanol implementation standard is GB338-2004. In this standard, refined alcohol is divided into three types: superior product standard, first-class product standard and qualified product. Among them, the superior products have the highest specifications. You can find these indicators in the specific standards of GB338-2004.