For those interested in green cleaning, some manufacturers sell “phosphate-free” TSP powder, available in home centers and hardware stores. The phosphate-free formulation contains sodium metasilicate.
Sodium metasilicate is highly alkaline. Dust from the powder can irritate the nose, eyes and lungs. When mixed with water to form a cleaning solution, prolonged exposure to this compound can cause skin irritation. Wear protective gloves, eye protection and long sleeved shirts and pants while using this product. Wear a dust mask while mixing the powder with water if dust irritates nasal passages.
Store the compound in original containers in a dry location. Sodium metasilicate is highly poisonous when ingested. Store it out of the reach of children or pets.
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