when was it discovered that asbestos was dangerous
Asbestos In 1899, Dr. Montague Murray noted the negative health effects of asbestos.[42] The first documented death related to asbestos was in 1906.[43]
Marsh test The first breakthrough in the detection of arsenic poisoning was in 1775 when Carl Wilhelm Scheele discovered a way to change arsenic trioxide to garlic-smelling arsine gas (AsH3), by treating it with nitric acid (HNO3) and combining it with zinc.[3]