Wikipedia sayings about what type of hazards do the standard pictograms represent?

1.Chlordane

reduce concentrations of chlordane by 21% in water in 30 days and in solids in 60 days. NIOSH Pocket Guide to Chemical Hazards. "#0112". National Institute

https://en.wikipedia.org/wiki/Chlordane

2.Formic acid

buildup in the containing vessel. For this reason, 98% formic acid is shipped in plastic bottles with self-venting caps. The hazards of solutions of formic

https://en.wikipedia.org/wiki/Formic acid