# The Notification of Installations Handling Hazardous Substances Regulations 1982, Part II: CLASSES OF SUBSTANCES NOT SPECIFICALLY NAMED IN PART I


1
2
Class of Substance
Notifiable quantity tonnes
1. Gas or any mixture of gases which is flammable in air and is held in the installation as a gas.
15
2. A substance or any mixture of substances which is flammable in air and is normally held in the installation above its boiling point (measured at 1 bar absolute) as a liquid or as a mixture of liquid and gas at a pressure of more than 1.4 bar absolute.
25 being the total quantity of substances above the boiling points whether held singly or in mixtures.
3. A liquefied gas or any mixture of liquefied gases, which is flammable in air, has a boiling point of less than 0°C (measured at 1 bar absolute) and is normally held in the installation under refrigeration or cooling at a pressure of 1.4 bar absolute or less.
50 being the total quantity of substances having boiling points below 0°C whether held singly or in mixtures.
4. A liquid or any mixture of liquids not included in items 1 to 3 above, which has a flash point of less than 21°C.
10,000

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Source: https://www.legislation.gov.uk/uksi/1982/1357/schedule/1/part/II (the official version)
Page: https://openlegislation.uk/notification-of-installations-handling-hazardous-substances-regulations-1982/schedule-1/part-II
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.