H phrases

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H-phrases or H-statements (short for Hazard Statements) form part of the Globally Harmonized System of Classification and Labelling of Chemicals (GHS). They are intended to form a set of standardized phrases about the hazards of chemical substances and mixtures that can be translated into different languages. From December 2010 they will gradually substitute R-phrases which will completely disappear by June 2017.

Hazard statements describe physical, health and environmental hazards. They are codified by using one letter, “H”, and three figures, the first of which indicates the primary nature of the hazard:

  • H2xy for physical hazards
  • H3xy for health hazards
  • H4xy for environmental hazards

International Hazard Statements

The following H-statements are internationally valid.

Physical Hazards

H200 Unstable explosive
H201 Explosive; mass explosion hazard
H202 Explosive; severe projection hazard
H203 Explosive; fire, blast or projection hazard
H204 Fire or projection hazard
H205 May mass explode in fire
H220 Extremely flammable gas
H221 Flammable gas
H222 Extremely flammable material
H223 Flammable material
H224 Extremely flammable liquid and vapour
H225 Highly flammable liquid and vapour
H226 Flammable liquid and vapour
H227 Combustible liquid
H228 Flammable solid
H240 Heating may cause an explosion
H241 Heating may cause a fire or explosion
H242 Heating may cause a fire
H250 Catches fire spontaneously if exposed to air
H251 Self-heating; may catch fire
H252 Self-heating in large quantities; may catch fire
H260 In contact with water releases flammable gases which may ignite spontaneously
H261 In contact with water releases flammable gas
H270 May cause or intensify fire; oxidizer
H271 May cause fire or explosion; strong oxidizer
H272 May intensify fire; oxidizer
H280 Contains gas under pressure; may explode if heated
H281 Contains refrigerated gas; may cause cryogenic burns or injury
H290 May be corrosive to metals

Health Hazards

H301 Toxic if swallowed
H302 Harmful if swallowed
H303 May be harmful if swallowed
H304 May be fatal if swallowed and enters airways
H305 May be harmful if swallowed and enters airways
H310 Fatal in contact with skin
H311 Toxic in contact with skin
H312 Harmful in contact with skin
H313 May be harmful in contact with skin
H314 Causes severe skin burns and eye damage
H315 Causes skin irritation
H316 Causes mild skin irritation
H317 May cause an allergic skin reaction
H318 Causes serious eye damage
H319 Causes serious eye irritation
H320 Causes eye irritation
H330 Fatal if inhaled
H331 Toxic if inhaled
H332 Harmful if inhaled
H333 May be harmful if inhaled
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335 May cause respiratory irritation
H336 May cause drowsiness or dizziness
H340 May cause genetic defects
H341 Suspected of causing genetic defects
H350 May cause cancer
H351 Suspected of causing cancer
H360 May damage fertility or the unborn child
H361 Suspected of damaging fertility or the unborn child
H362 May cause harm to breast-fed children
H370 Causes damage to organs
H371 May cause damage to organs
H372 Causes damage to organs through prolonged or repeated exposure
H373 May cause damage to organs through prolonged or repeated exposure

Environmental Hazards

H400 Very toxic to aquatic life
H401 Toxic to aquatic life
H402 Harmful to aquatic life
H410 Very toxic to aquatic life with long lasting effects
H411 Toxic to aquatic life with long lasting effects
H412 Harmful to aquatic life with long lasting effects
H413 May cause long lasting harmful effects to aquatic life

European Union Specific Hazard Statements (EUH-statements)

The following EUH-statements are only valid in all countries within the EU.

Physical Hazards

EUH001 Explosive when dry
EUH006 Explosive with or without contact with air
EUH014 Reacts violently with water
EUH018 In use may form flammable/explosive vapour-air mixture
EUH019 May form explosive peroxides
EUH044 Risk of explosion if heated under confinement

Health Hazards

EUH029 Contact with water liberates toxic gas
EUH031 Contact with acids liberates toxic gas
EUH032 Contact with acids liberates very toxic gas
EUH066 Repeated exposure may cause skin dryness or cracking
EUH070 Toxic by eye contact
EUH071 Corrosive to the respiratory tract

Environmental Hazards

EUH059 Hazardous to the ozone layer

Other EU Hazard Statements

EUH201 Contains lead. Should not be used on surfaces liable to be chewed or sucked by children.
EUH201A Warning! Contains lead.
EUH202 Cyanoacrylate. Danger. Bonds skin and eyes in seconds. Keep out of the reach of children.
EUH203 Contains chromium(VI). May produce an allergic reaction.
EUH204 Contains isocyanates. May produce an allergic reaction.
EUH205 Contains epoxy constituents. May produce an allergic reaction.
EUH206 Warning! Do not use together with other products. May release dangerous gases (chlorine).
EUH207 Warning! Contains cadmium. Dangerous fumes are formed during use. See information supplied by the manufacturer. Comply with the safety instructions.
EUH208 Contains <name of sensitising substance>. May produce an allergic reaction.
EUH209 Can become highly flammable in use.
EUH209A Can become flammable in use.
EUH210 Safety data sheet available on request.
EUH401 To avoid risks to human health and the environment, comply with the instructions for use.