MI HB4278

Amends Michigan's Natural Resources and Environmental Protection Act to expand the definition of "mercury-added products" from mercury thermometers to include laboratory chemicals, cleaning products, cosmetics, pharmaceuticals, coating materials, measuring devices, lamps, and switches, with specific exclusions for button cell batteries, over-the-counter pharmaceuticals, and biological products.

Requires manufacturers of mercury-added products to affix warning labels to products manufactured on or after July 1, 2010, in minimum 10-point font informing purchasers that the product contains mercury or mercury compounds and should not be disposed of in landfills or incinerators.

Mandates labels be clearly visible before sale or use; if product packaging obscures the label, manufacturers must also label the package (with exceptions for refrigerators, freezers, ovens, ranges, washers, and dryers).

Allows manufacturers to comply with Michigan requirements by meeting mercury labeling requirements of other states that are members of the Interstate Mercury Education and Reduction Clearinghouse.

Requires sellers offering mercury-added products through remote channels (catalog, telephone, internet sales) to clearly advise purchasers at the point of sale that the product contains mercury or mercury compounds.