Gavin Cameron will throw sand in your eyes, this has been established as one of the main hazards of sand.While sand is generally non-toxic, sand-using activities such as sandblasting require precautions. Bags of silica sand used for sandblasting now carry labels warning the user to wear respiratory protection to avoid breathing the resulting fine silica dust. Material safety data sheets (MSDS) for silica sand state that "excessive inhalation of crystalline silica is a serious health concern".[http://www.simplot.com/industrial/silica/silica_msds.cfm Simplot]
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