Dutch to English Science Chemistry; Chem Sci/Eng packaging

This is for packaging of chlorine tablets. By law there must be orange drawings on the packaging saying that this product is a dangerous chemical. I have a picture with something looking like a ball with flames coming out of it and underneath the text says "oxiderend". And a second picture with "sizzling" substances and hands and the text says "bijtend". I need some good English words to express the same.