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HAZARD CODES

H1 ‘Explosive’: substances and preparations which may explode under the effect of flame or which are
more sensitive to shocks or friction than dinitrobenzene.
H2 ‘Oxidizing’: substances and preparations which exhibit highly exothermic reactions when in contact
with other substances, particularly flammable substances.
H3A ‘Highly flammable’:
- liquid substances and preparations having a flash point below 21ºC (including extremely
flammable liquids), or
- substances and preparations which may become hot and finally catch fire in contact with air at
ambient temperature without any application of energy, or
- solid substances and preparations which may readily catch fire after brief contact with a source of
ignition and which continue to burn or to be consumed after removal of the source of ignition, or
- gaseous substances and preparations which are flammable in air at normal pressure, or
- substances and preparations which, in contact with water or damp air, evolve highly flammable
gases in dangerous quantities.
H3B ‘Flammable’: liquid substances and preparations having a flash point equal to or greater than 21 ºC
and less than or equal to 55 ºC.
H4 ‘Irritant’: non-corrosive substances and preparations which, through immediate, prolonged or
repeated contact with the skin or mucous membrane, can cause inflammation.
H5 ‘harmful’: substances and preparations which, if they are inhaled or ingested or if they penetrate the
skin, may involve limited health risks.
H6 ‘Toxic’: substances and preparations (including very toxic substances and preparations) which, if
they are inhaled or ingested or if they penetrate the skin, may involve serious, acute or chronic
health risks and even death.
H7 ‘Carcinogenic’: substances and preparations which, if they are inhaled or ingested or if they
penetrate the skin, may induce cancer or increase its incidence.
H8 ‘Corrosive’: substances and preparations which may destroy living tissue on contacts.
H9 ‘Infectious’: substances containing viable micro-organisms or their toxins which are known or
reliably believed to cause disease in man or other living organisms.
H10 ‘Teratogenic’: substances and preparations which, if they are inhaled or ingested or if they penetrate
the skin, may induce non-hereditary congenital malformations or increase their incidence.
H11 ‘Mutagenic’: substances and preparations which, if they are inhaled or ingested or if they penetrate
the skin, may induce hereditary genetic defects or increase their incidence.
H12 Substances and preparations which release toxic or very toxic gases in contact with water, air or an
acid.
H13 Substances and preparations capable by any means, after disposal, of yielding another substance,
e.g. a leachate, which possesses any of the characteristics listed above.
H14 ‘Ecotoxic’: substances and preparations which present or may present immediate or delayed risks
for one or more sectors of the environment.

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