Two questions the register has to answer
The first is the familiar one: what is in the building, what does it do to a person exposed to it, and where is the information if something goes wrong. That is what a data sheet exists for, and it should be accessible on site rather than held only at a contractor's office. Accessible means someone can reach it during the incident, not that it can be emailed the following day.
The second question is specific to older premises: what does this product do to the material it lands on. A general-purpose cleaner that is entirely appropriate on laminate can etch or bleach an original surface. Recording an approved method per surface is more useful than recording a product list alone, and it gives a new cleaner something to follow when a mark appears on a floor nobody wants to sand.
