Just bought some of this stuff for moss. Its 20 % ferrous sulfate wettable powder for treating moss. Came in a paper bag that got wet. I put it in front of the space heater while I worked in the garage and now I feel sick. There is no label for use. The supplier told me how to mix it (1lb in 10 Litres of warm water) Thats all good, but can u tell me what kind of precations I have to take with this stuff. Ill wear gloves but should I have a resporator, im sure they would have told me if it was dangerous but when I breath in I get a bad chemical taste in my mouth. Help and experience with this product appreciated.