If a small company, in a tiny office, buys whatever cleaning chemicals happen to be on hand, or on offer, and therefore keep changing what they are using; do they need to keep new records of the safety data sheets, every time they buy something?

Thanks

As Kate says the domestic shop purchased chemicals actually rely on the product label to communicate their hazards rather than a formal Safety Data Sheet which is perfectly acceptable under REACH.

Regarding assessments personally I see these as falling in to groups of similar chemistries - bleaches, washing up liquids, scouring powders, furniture polish etc. rather than individual by named product (just check what is written remains relevant in light of any new purchases).

Most are specifically formulated to avoid significant hazard so for example brick & patio cleaners should be less than 10% corrosive to be supplied in accordance with The offensive Weapons Act (corrosive substances).

NOTE however that in the event someone mentions adverse skin or eye reaction take a note of the label. It is probably not the "active" but more likely the in can preservative causing issue.

As Roundtuit and Kate have said a file with SDS’s in it, is not the point of COSHH and even the risk assessment is a stop on the true point of COSSH, which is, what controls you will be applying when using this substance in your workplace.

Most cleaning products are chemically very similar and the risks they pose when being used in accordance with manufacturers’   instructions will be fairly similar hence the controls will be similar. If you do keep changing products you need to check the label because some manufacturer might decide to make their product “better” by for example making it more alkali or acidic. This means that it becomes CORROSIVE rather than just an IRRITANT.  

Some domestic products are surprisingly hazardous.