The primary piece of legislation governing the duties of employers to keep their workforce safe and healthy is the Safety, Health and Welfare at Work Act, 2005.
There are a number of additional Acts relating to health and safety for example:-
Carriage of Dangerous Goods by Road Act, 1998
Chemicals Act, 2008 & Chemicals (Amendment) Act 2010
Chemical Weapons Act, 1997
Organisation of Working Time Act, 1997
There are also a significant number of regulations that apply to places of work within Ireland which provide more details of the regulatory requirements under primary legislation (Acts). The most significant regulation is the Safety, Health and Welfare at Work (General Application) Regulations, 2007 which contains many of the provisions that apply to almost all workplaces.
In addition to legislation there are a number of 'Codes of Practice' that also relate to health and safety in the workplace.
Most national primary and secondary health and safety legislation can be found on the Irish Statute Book website or via the Health and Safety Authority's website.
A summary document outlining currently applicable health and safety legislation in Ireland is available on the HSA's website here.