This did not come about by enlightenment where Apple’s suits are concerned, as the Cupertino company has been under pressure by China Labor Watch and Green America from March onward concerning the continued use of benzene and n-hexane in manufacturing. These two chemicals have long been linked to health problems, and the industry also provides far superior alternatives.
Just so that everyone is on the same page, benzene happens to be a cleaning agent, and n-hexane is a solvent. The former is a known carcinogen that causes leukemia, while n-hexane has been linked to nerve damage. So far, Apple’s investigation points to four of the 22 manufacturers used by Apple being “guilty” of using said chemicals, albeit the usage were within designated safety limits.
Better being safe than sorry, Apple has put forward their instruction to ban these chemicals when it comes to the final stages of iOS and Mac product assembly.