# The Carcinogens and Mutagens (Miscellaneous Amendments) Regulations 2020, Schedule: Table of Limit Values


Name of agent
EC No
CAS No
Limit values
Notation
Transitional measures
mg/m3
ppm
f/ml
(1)EC No, i.e. Einecs, ELINCS or NLP, is the official number of the substance within the European Union, as defined in Section 1.1.1.2 in Annex VI, Part 1, to Regulation (EC) No 1272/2008.
(2)CAS No: Chemical Abstract Service Registry Number.
(3)Measured or calculated in relation to a reference period of eight hours.
(4)mg/m3 = milligrams per cubic metre of air at 20 °C and 101,3 kPa (760 mm mercury pressure).
(5)ppm = parts per million by volume in air (ml/m3).
(6)f/ml = fibres per millilitre.
(7)Inhalable fraction: if hardwood dusts are mixed with other wood dusts, the limit value shall apply to all wood dusts present in that mixture.
(8)Respirable fraction.
(9)Substantial contribution to the total body burden via dermal exposure possible.
Hardwood dusts
—
—
2
—
—
—
Limit value 3 mg/m3 until 17 January 2023
Chromium (VI) compounds which are carcinogens within the meaning of point (i) of Article 2(a) (as chromium)
—
—
0,005
—
—
—
Limit values:
0,025 mg/m3 for welding or plasma cutting processes or similar work processes that generate fume until 17 January 2025, and
0,010 mg/m3 until 17 January 2025 in all other cases
Refractory ceramic fibres which are carcinogens within the meaning of point (i) of Article 2(a)
—
—
—
—
0,3
—
Respirable crystalline silica dust
—
—
0,1
—
—
—
Benzene
200-753-7
71-43-2
3,25
1
—
skin
Vinyl chloride monomer
200-831-0
75-01-4
2,6
1
—
—
Ethylene oxide
200-849-9
75-21-8
1,8
1
—
skin
1,2-Epoxypropane
200-879-2
75-56-9
2,4
1
—
—
Acrylamide
201-173-7
79-06-1
0,1
—
—
skin
2-Nitropropane
201-209-1
79-46-9
18
5
—
—
o-Toluidine
202-429-0
95-53-4
0,5
0,1
—
skin
1,3-Butadiene
203-450-8
106-99-0
2,2
1
—
—
Hydrazine
206-114-9
302-01-2
0,013
0,01
—
skin
Bromoethylene
209-800-6
593-60-2
4,4
1
—
—

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Source: https://www.legislation.gov.uk/uksi/2020/40/schedule (the official version)
Page: https://openlegislation.uk/carcinogens-and-mutagens-miscellaneous-amendments-regulations-2020/schedule
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.