Liquid Plumr is a trademarked product by Clorox Commercial Solutions. You can access more information on Liquid Plumr and other Clorox Commercial Solutions by visiting the company's official website.
Clorox Commercial Solutions officially states on its website that Liquid Plumr is a product that will not harm your garbage disposal if it is part of a "sound plumbing system." Included in this system are pipes that are made of plastic and are connected to the garbage disposal. If you have an old house with a pipe system that may have galvanized pipes, then you should check with a professional plumber before pouring Liquid Plumr into your garbage disposal.
To use Liquid Plumr to dislodge a clog in your garbage disposal, pour the solution into your drain --- usually about half the bottle. Wait for approximately 10 to 15 minutes. Next, turn on the water and turn on the disposal for a few minutes. If the clog does not dislodge, then you can repeat the process.
Purchase Liquid Plumr from your local home goods supply store, home construction store, grocery store or favorite online vendor for home supplies.