Safety data sheets are a document that gives all the data on the product and required under COSHH. The supplier must send you a data sheet when the product is first ordered, if the formulation changes, or if you ask for a sheet. If it is not dangerous to supply the supplier should include instructions for safe use with the package
Having safety data sheets do not replace a risk assessment but will give you vital information on the product and the unique hazards that it could cause. Having this data does not apply it to your workplace. For example, you may have a product and use it safely then you mix it with another product or use it in a different way and this changes the hazard and the risks it poses.