# The Control of Substances Hazardous to Health (Amendment) Regulations 1997, Regulation 2: Amendment to the Control of Substances Hazardous to Health (Amendment) Regulations 1996


For the following provisions of the Schedule to the Control of Substances Hazardous to Health (Amendment) Regulations 1996—
“
Substance
Formula
Reference periods
Long-term maximum exposure limit (8-hour TWA reference period)
ppm
mg m−3
Short-term maximum exposure limit (15-minute reference period)
ppm
mg m−3
Cobalt and cobalt compound (as Co)
Co
—
—
Cotton dust
—
2.5
—
—
1,2–
Dibromoethane (Ethylene dibromide)
BrCH2CH2Br
0.5
3.9
—
—
”
there shall be substituted the following—
“
Substance
Formula
Reference periods
Long-term maximum exposure limit (8-hour TWA reference period)
ppm
mg m−3
Short-term maximum exposure limit (15-minute reference period)
ppm
mg m−3
Cobalt and cobalt compound (as Co)
Co
—
0.1
—
—
Cotton dust
—
2.5
—
—
Dibromoethane (Ethylene dibromide)
BrCH2CH2Br
0.5
3.9
—
—
”

---
Source: https://www.legislation.gov.uk/uksi/1997/11/regulation/2 (the official version)
Page: https://openlegislation.uk/control-of-substances-hazardous-to-health-amendment-regulations-1997/regulation-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.