Why are chemical industry workers particularly at risk for hearing loss?

There’s growing evidence that shows chemical industry workers are particularly vulnerable to hearing loss.

Answer Extra: 

Exposures to certain compounds (those containing lead, toluene, n-butyl alcohol and carbon monoxide) have been linked to increased hearing loss by themselves, and they are now known to combine synergistically with noise to cause increased hearing loss. Individual susceptibilities appear quite varied, and the offending noise levels are difficult to generalize.

Hearing professionals recommend increasing the frequency of audiometric testing for noise-exposed employees who are also exposed to significant levels of ototoxic solvents, heavy metals and other chemical compounds.

Hearing Conservation For The Chemical Industry