| Sulfur in its natural form is a tasteless, odorless, light yellow solid, once forcefully fed to children in the belief that it was good for their health. Sulfur compounds, found in dairy products and eggs, are an essential dietary ingredient. However, hydrogen sulfide (H2S), a compound that is very similar to water (H2O) and smells like rotting eggs, is quite poisonous. Sulfur burns with a pale blue flame (shown here), producing sulfur dioxide (SO2), which when further oxidized and combined with atmospheric moisture, is one of the principal ingredients of acid rain. |
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