Soldering Fume
exposure testing

Soldering and brazing fumes are respiratory sensitisers that cause occupational asthama


When engaging in soldering or brazing processes, it's crucial to be aware of the potential health risks associated with the fumes generated. These fumes comprise a intricate blend of fine particles that, when inhaled, may lead to adverse health effects. A primary concern is the rosin (colophony)-based solder flux, a substance employed to prevent the oxidation of metal surfaces during soldering by creating a protective barrier against air exposure.

Beyond the sensitisation effects linked to rosin flux exposure, it's important to note that soldering and brazing activities produce fumes containing metals such as Lead. Prolonged exposure to these metals can contribute to systemic health issues, including the potential for developing cancers. Safeguarding against these risks involves implementing proper ventilation systems and utilising appropriate personal protective equipment to minimise the inhalation of harmful fumes during these processes.

ActionsActions and advice

The first step in the process is to carryout a risk assessment by identifying what soldering or brazing activities are being carried out on your site.

Once the potential risk has been identified an assessment of exposure levels should be conducted by implementing an exposure testing regime in line with HSG173. The measured exposure should then be compared with the workplace exposure levels (WEL's) as defined by the Health & Safety Executive. Any actions should then be taken to either reduce or control exposure as part of an ongoing monitoring regime.

HelpHow can we help?

Our consultants are here to help you and can develop and implement monitoring strategies to indentify if maximum exposure limits are being exceeded with respect to solder or brazing fume exposure in the workplace. Our team we will advise on appropriate measures to be taken to reduce the risk of exposure and ensure you comply with the Control of Substances Hazardous to Health Regulations.

For further help call us on 0870 7019170 or email:


Knowledge Centre Article

Expand your knowledge on this topic by reading our informative article

A Guide to Managing Risks from Rosin-Based Solder Flux Fumes
A Guide to Managing Risks from Rosin-Based Solder Flux Fumes


This guide is intended for employers and provides detailed insights into the risks associated with rosin (colophony)-based solder flux fumes. The article aims to foster a deeper understanding of the hazards, legal obligations under the Control of Substances Hazardous to Health Regulations 2002 (COSHH), and robust preventive measures to ensure a secure working environment.

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