Source: WM3 - Guidance on the classification and assessment of waste 1st edition 2015
Properties of waste which render it hazardous:
| HP1 | “Explosive”: 'waste which is capable by chemical reaction of producing gas at such a temperature and pressure and at such a speed as to cause damage to the surroundings. Pyrotechnic waste, explosive organic peroxide waste and explosive self-reactive waste is included’ |
| HP2 | “Oxidizing”:‘waste which may, generally by providing oxygen, cause or contribute to the combustion of other materials’ |
| 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. |
| 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. |
| HP5 | “Harmful”: waste which can cause specific target organ toxicity either from a single or repeated exposure, or which cause acute toxic effects following aspiration |
| HP6 | “Toxic”: waste which can cause acute toxic effects following oral or dermal administration, or inhalation exposure |
| HP7 | “Carcinogenic”: waste which induces cancer or increase its incidence. |
| HP8 | “Corrosive”: waste which on application, can cause skin corrosion. |
| HP9 | “Infectious”: waste containing viable micro-organisms or their toxins which are known or reliably believed to cause disease in man or other living organisms. |
| HP10 | “Toxic for reproduction”: waste which has adverse effects on sexual function and fertility in adult males and females, as well as developmental toxicity in the offspring. |
| HP11 | “Mutagenic”: waste which may cause a mutation, that is a permanent change in the amount or structure of the genetic material in a cell. |
| HP12 | "Release of an acute toxic gas": waste which releases acute toxic gases (Acute Tox. 1, 2 or 3) in contact with water or an acid |
| HP13 | “Sensitizing”: waste which contains one or more substances known to cause sensitising effects to the skin or the respiratory organs |
| HP14 | “Ecotoxic”: waste which presents or may present immediate or delayed risks for one or more sectors of the environment. |
| HP15 | Waste capable of exhibiting a hazardous property listed above not directly displayed by the original waste |