In the U.S.A., "sanitizer" is a legal term defined by the Environmental Protection Agency. In order for a product to be called a sanitizer in promotional literature or on its packaging, that product must be approved by the EPA, assigned a registration number, and have an open file maintained with the EPA. Unless a company would like to invest an enormous amount of capitol in this process (or use another company's product through a process called "sub-registration"), they may not call their product a sanitizer.
If you purchase a bottle of bleach from the grocery store, unless it shows an EPA registration number on the front of the label, it is not a sanitizer. However, it will certainly be a good cleanser (although somewhat hazardous, not environmentally sound, and it will require rinsing).
