A COSHH assessment identifies the hazards associated with hazardous substances in the workplace. A thorough risk assessment concentrates on the workplace’s exposure to hazardous substances. It provides a useful guide for how to work safely with a hazardous substance.

The COSHH data sheet, or safety data sheet, is provided by the manufacturer or supplier along with the hazardous substance. It provides technical information about a chemical’s hazards and carries complete information about safe handling and emergency procedures. The data sheet is not a risk assessment. The COSHH data sheet influences the risk assessment, but it should be documented separately.

In the event of accidental exposure to a hazardous substance, if medical attention is required, it is important to bring safety data sheets with you to the hospital.

There is no requirement to have a qualification to conduct COSHH assessments, however, you must be competent. According to the HSE, competency means you have the required skills, knowledge and experience to conduct a risk assessment properly.

You should be able to understand hazards and risks, know how people may be exposed to substances hazardous to health, have the ability to collect necessary information and have skills, knowledge and experience to decide how to control exposure.

Any substance that can cause harm and is hazardous falls under COSHH’s remit. Hazardous substances are labelled with specific COSHH symbols for easy recognition. It is important to note that lead, asbestos and radioactive elements do not fall under COSHH, they are governed by specific regulations.

COSHH applies to any substance that:

• Is listed in Table 3.2 of part 3 Annex VI of the CLP Regulation, which are indicated as toxic, very toxic, corrosive, harmful or an irritant
• The Health and Safety Executive (HSE) has provided a Workplace Exposure Limit
• Is a biological agent

In addition, most dusts fall under COSHH regulations, as well as any substances present risks to health. Further information can be found on the HSE website.

Yes, training is essential to ensure employees are well aware of risks associated with hazardous substances. Control measures are not fully effective if the employees do not know how to use them, e.g. deal with spillages. Therefore, employees should be made aware of using emergency procedures in the workplace through adequate safety training courses.