HSE

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Summary: in the NPI rank given to this substance (see comparative data below). A substance that scores highly as a health hazard is arsenic at 2.3 and one of the lowest scores is ammonia at 1.0. Health guidelines Worksafe Australia has set the exposure standard for hydrochloric acid (hydrogen chloride) to 5 ppm (7.5 milligram/m3 (TWA).Note: For some rapidly acting substances and

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