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The Control of Major Accident Hazards Regulations 2015

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PART 1 E+W+SCategories of Dangerous Substances

Column 1Column 2Column 3
Hazard categories in accordance with the CLP RegulationQualifying quantity in tonnes of dangerous substances for the application of:
Lower tier requirementsUpper tier requirements
Section ‘H’ – HEALTH HAZARDS
H1 ACUTE TOXIC Category 1, all exposure routes520

H2 ACUTE TOXIC

— Category 2, all exposure routes

— Category 3, inhalation exposure route (see note 7)

50200
H3 STOT SPECIFIC TARGET ORGAN TOXICITY – SINGLE EXPOSURE STOT SE Category 150200
Section ‘P’ – PHYSICAL HAZARDS

P1a EXPLOSIVES (see note 8)

— Unstable explosives or

— Explosives, Division 1.1, 1.2, 1.3, 1.5 or 1.6, or — Substances or mixtures which have explosive properties according to method A.14 of Regulation (EC) No. 440/2008 of 30 May 2008 laying down test methods pursuant to Regulation (EC) No. 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) (see note 9) and do not belong to the hazard classes Organic peroxides or Self-reactive substances and mixtures

1050

P1b EXPLOSIVES (see note 8)

Explosives, Division 1.4 (see note 10)

50200

P2 FLAMMABLE GASES

Flammable gases, Category 1 or 2

1050

P3a FLAMMABLE AEROSOLS (see note 11(1))

‘Flammable’ aerosols Category 1 or 2, containing flammable gases Category 1 or 2 or flammable liquids Category 1

150 (net)500 (net)

P3b FLAMMABLE AEROSOLS (see note 11(1))

‘Flammable’ aerosols Category 1 or 2, not containing flammable gases Category 1 or 2 nor flammable liquids category 1 (see note 11(2))

5,000 (net)50,000 (net)

P4 OXIDISING GASES

Oxidising gases, Category 1

50200

P5a FLAMMABLE LIQUIDS

— Flammable liquids, Category 1, or

— Flammable liquids Category 2 or 3 maintained at a temperature above their boiling point, or

— Other liquids with a flash point ≤ 60°C, maintained at a temperature above their boiling point (see note 12)

1050

P5b FLAMMABLE LIQUIDS

— Flammable liquids Category 2 or 3 where particular processing conditions, such as high pressure or high temperature, may create major accident hazards, or

— Other liquids with a flash point ≤ 60°C where particular processing conditions, such as high pressure or high temperature, may create major accident hazards (see note 12)

50200

P5c FLAMMABLE LIQUIDS

Flammable liquids, Categories 2 or 3 not covered by P5a and P5b

5,00050,000

P6a SELF-REACTIVE SUBSTANCES AND MIXTURES and ORGANIC PEROXIDES

Self-reactive substances and mixtures, Type A or B or organic peroxides, Type A or B

1050

P6b SELF-REACTIVE SUBSTANCES AND MIXTURES and ORGANIC PEROXIDES

Self-reactive substances and mixtures, Type C, D, E or F or organic peroxides, Type C, D, E, or F

50200

P7 PYROPHORIC LIQUIDS AND SOLIDS

Pyrophoric liquids, Category 1

Pyrophoric solids, Category 1

50200

P8 OXIDISING LIQUIDS AND SOLIDS

Oxidising Liquids, Category 1, 2 or 3, or

Oxidising Solids, Category 1, 2 or 3

50200
Section ‘E’ – ENVIRONMENTAL HAZARDS
E1 Hazardous to the Aquatic Environment in Category Acute 1 or Chronic 1100200
E2 Hazardous to the Aquatic Environment in Category Chronic 2200500
Section ‘O’ – OTHER HAZARDS
O1 Substances or mixtures with hazard statement EUH014100500
O2 Substances and mixtures which in contact with water emit flammable gases, Category 1100500
O3 Substances or mixtures with hazard statement EUH02950200

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