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HP3
Flammable
Flammable liquid waste: liquid waste having a flash point below 60°C or waste gas oil, diesel and light heating oils having a flash point > 55°C and = 75°C; Flammable pyrophoric liquid and solid waste: solid or liquid waste which, even in small quantities, is liable to ignite within five minutes after coming into contact with air; Flammable solid waste: solid waste which is readily combustible or may cause or contribute to fire through friction; Flammable gaseous waste: gaseous waste which is flammable in air at 20°C and a standard pressure of 101.3 kPa; Water reactive waste: waste which, in contact with water, emits flammable gases in dangerous quantities; Other flammable waste: flammable aerosols, flammable self-heating waste, flammable organic peroxides and flammable self-reactive waste
Property name
Flammable
Flammable liquid waste: liquid waste having a flash point below 60°C or waste gas oil, diesel and light heating oils having a flash point > 55°C and = 75°C; Flammable pyrophoric liquid and solid waste: solid or liquid waste which, even in small quantities, is liable to ignite within five minutes after coming into contact with air; Flammable solid waste: solid waste which is readily combustible or may cause or contribute to fire through friction; Flammable gaseous waste: gaseous waste which is flammable in air at 20°C and a standard pressure of 101.3 kPa; Water reactive waste: waste which, in contact with water, emits flammable gases in dangerous quantities; Other flammable waste: flammable aerosols, flammable self-heating waste, flammable organic peroxides and flammable self-reactive waste
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HP2
Oxidizing
Waste which may, generally by providing oxygen, cause or contribute to the combustion of other materials
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HP4
Irritant
Waste which on application can cause skin irritation or damage to the eye. Hazards HP 4 and HP 8 are linked because they refer to the potential for harm or damage to tissue at different levels of severity. See C8 for further details. Hazardous wastes containing irritant substances will only display irritant properties. Hazardous wastes containing corrosive substances can display either corrosive or irritant properties dependent upon concentration. The mechanical irritation produced by some substances, for example mineral wool, is not included within the definition of HP 4