Apple has been under fire from environmental groups for ages now, due to the presence of toxic chemicals at several of its production factories. Now, according to a report from Tech News World, Apple is cracking down on the use of these chemicals, but is it all too little, too late?

The chemicals in question, benzene and n-hexane, are dangerous for different reasons. Benzene, which is often used in cleaning products, is a known carcinogen, while hexane is so toxic that inhalation of the substance can make people dizzy. Concentrations of the chemical in excess of 50 grams can be fatal.

Green America and several other environmental groups have been strongly critical of both Apple and the company’s suppliers for their use of benzene and n-hexane in the manufacturing of products. Earlier this year, Green America launched a campaign called “Bad Apple,” which hit high-level Apple executives with petitions concerning the use of the chemicals. The environmental group claimed that workers at Apple factories in China were facing leukemia diagnoses due to benzene exposure, catastrophic nerve damage due to n-hexane, and skin problems from working with dangerous acidic chemicals.

Apple has now published a new Regulated Substances Specification (RSS) document showing that it is abiding by all legal standards and regulations with its use of both hexane and benzene. However, the company also pledged to provide for safer working conditions throughout its supply chain, and that means searching for alternatives to hexane and benzene in the product manufacturing process. Precisely what these chemicals are used for is unknown, though n-hexane poisoning has been a problem in the past at factories charged with making iPhone screens.

To start moving toward safer workplace environments, Apple visited and inspected 22 of the factories in its supply chain. Four of those facilities were found to be using benzene and/or n-hexane.