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According to its maker, Ledizolv is a biodegradable, phosphate-free detergent that dissolves lead-contaminated dust more effectively than multipurpose cleaners or harsh chemicals like TSP. Its mild pH means it won’t harm wood floors or painted surfaces, says the company. The product comes in a highly concentrated form that you mix with water in a 50-to-1 ratio. It’s sold in container sizes from 8 ounces to 55 gallons; a one-gallon bottle costs about $75.

LSZ, 914/948-3797,