Parts per
million
Effect
50
Recommended Exposure Limit (8 hours time weighted average
concentration)
200
Headache after approximately 7 hours if resting or after 2 hours
exertion
400
Headache with discomfort with possibility of collapse after 2 hours at
rest or 45 minutes exertion.
1200
Palpitations after 30 minutes at rest or 10 minutes exertion.
2000
Unconscious after 30 minutes at rest or up to 10 minutes exertion.
For further information refer to:
l
Guidance Note EH43 (1996) from the Health and Safety Executive. ISBN 0 11
883597 1
l
EH40/ 2005 Workplace Exposure Limits 2011. ISBN 978 0 7176 6446 7
7
1.0 Symbols and Warnings
