The short answer is yes. The perchlorate regulations for California require that product manufacturers, or product distributors, who bring products into California label those products to inform consumers of the perchlorate content and where additional information can be found. The 6 parts-per-billion threshold applies to any product that contains perchlorate or a perchlorate device –so you have to label perchlorate-containing batteries and any product that contains those batteries. For example, a coin-cell, lithium-manganese dioxide battery containing perchlorate is considered to be a “consumer good” or commodity, and subject to the labeling requirements for perchlorate materials, as would be the product that runs off that battery (if the battery is included with the end product). You have options for labeling, though. One option is to use a Material Safety Data Sheet (known by its familiar acronym, MSDS), the shipping documents themselves, or a package insert. The packing insert can be a product flyer (a separate sheet included with the instructions), the product manual, or a sticker.