Leading US industry body the American Conference of Governmental Industrial Hygienists (ACGIH) has changed its recommended threshold limit value for n-Propyl Bromide (nPB) from 10 ppm to just 0.1 ppm, amid concerns over health risks to workers.
In addition, nPB has also been added to the candidate list for inclusion in Annex XIV of European REACH regulations as a ‘Substance of Very High Concern’ (SVHC).
This means nPB faces the prospect that, like Trichloroethylene (Trike), it will become subject to continued use as a cleaning solvent only subject to authorisation and specific risk management measures – but with a different sunset date.
‘Current users of Trichloroethylene and nPB are recommended to discuss the implications of REACH with their chemical and equipment suppliers as a matter of priority.’
Meanwhile, the UK Health and Safety Executive states in its information sheet EIS47, ‘If solvent degreasing is necessary and you are using a known or suspected carcinogen and/or mutagen, such as … nPB, you should substitute it with a less hazardous solvent if possible.’
It goes on to say, ‘Current users of Trichloroethylene and nPB are recommended to discuss the implications of REACH with their chemical and equipment suppliers as a matter of priority.’ We are ready to guide you through the maze of REACH compliance and support you with finding a substitute cleaning agent, by offering free expert advice and chemistry trials.
Sion solves the solvent problem
New Opteon™ Sion™ by Chemours™ cleaning agent, which we supply exclusively in the UK, helps overcome the health and safety and environmental risks associated with nPB. It is also fully compliant with current and anticipated legislation.
With comparable cleaning performance to nPB and chlorinated solvents, Sion has an occupational exposure limit of 200 parts per million (ppm), some 2000 times better than the ACGIH recommended level for nPB.