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Brief hazard characteristics

Hazard Statements (H-phrases, hazard statements, hazard statements) are unified warnings about the nature or degree of danger established within the Globally Harmonized System of Classification and Labelling of Chemicals (GHS).

Warnings are used as a set of standard phrases to briefly describe common hazards that arise when working with chemicals. In 2011, the list of warnings was republished in the fourth revised edition of the GHS.

The number of entries in this glossary is 96.
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Glossaries

Term Definition
H200
Unstable explosive
H201
Explosive substance; danger of explosion by mass
H202
Explosive substance; significant risk of scattering
H203
Explosive substance; fire hazard
H204
Risk of fire or spreading
H205
Possibility of explosion by mass under the action of fire
H206
H207
Risk of fire or scattering; increased risk of explosion with reduced desensitizing agent
H208
Fire hazard; increased risk of explosion with reduced desensitizing agent
H220
Flammable gas
H221
Flammable gas
H222
Flammable aerosols
H223
Flammable aerosols
H224
Extremely flammable liquid and vapor
H225
Flammable liquid and vapor
H226
Flammable liquid and vapor
H227
Flammable liquid
H228
Flammable solid
H229
Pressurized cylinder: an explosion may occur when heated
H230
When reacting, an explosion may occur even in the absence of air
H231
Upon reacting, an explosion may occur even in the absence of air at elevated pressure and/or temperature
H232
May self-ignite upon contact with air
H240
An explosion may occur when heated
H241
When heated, an explosion or fire may occur
H242
When heated, a fire may occur
H250
Spontaneous combustion in the open air
H251
Self-heating substances; probability of ignition
H252
Self-heating substances in large quantities; the probability of fire
H260
In contact with water , flammable gases are released
H261
In contact with water , flammable gas is released
H270
May cause or enhance gorenje; oxidizer
H271
May cause gorenje and explosion; strong oxidizer
H272
May increase gorenje; oxidizer
H280
Contains gas under pressure; an explosion may occur when heated
H281
Contains cooled gas; may cause cryogenic burns or injury
H290
May cause corrosion of metals
H300
Fatal if swallowed
H300 + H310
Fatal if swallowed or in contact with skin
H300 + H310 + H330
Fatal if swallowed
H300 + H330
Fatal if swallowed or if inhaled
H301
Toxic if swallowed
H301 + H311
Toxic if swallowed or in contact with skin
H301 + H311 + H331
Toxic if swallowed
H301 + H331
Toxic if swallowed or if inhaled
H302
Harmful if swallowed
H302 + H312
Dangerous if swallowed or in contact with skin
H302 + H312 + H332
Dangerous if swallowed
H302 + H332
Dangerous if swallowed or if inhaled
H303
May cause harm if swallowed
H303 + H313
May be dangerous if swallowed or in contact with skin
H303 + H313 + H333
May be dangerous if swallowed
H303 + H333
May be dangerous if swallowed or if inhaled
H304
May be fatal if swallowed and inhaled
H305
May be harmful if swallowed and inhaled
H310
Fatal in contact with skin
H310 + H330
Fatal in contact with skin or by inhalation
H311
Toxic in contact with skin
H311 + H331
Toxic in contact with skin or by inhalation
H312
Harmful in contact with skin
H312 + H332
Dangerous in contact with skin or if inhaled
H313
May be harmful in contact with skin
H313 + H333
May be dangerous in contact with skin or if inhaled
H314
Causes severe skin burns and eye damage
H315
Causes skin irritation
H315 + H320
Causes skin and eye 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 by inhalation
H332
Harmful if inhaled
H333
May cause harm if inhaled
H334
May cause allergic or asthmatic symptoms or breathing difficulties if inhaled.
H335
May cause respiratory tract 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 cause damage to fertility or the fetus (***) (**)
H361
Suspected of damaging fertility or the fetus (***) (**)
H362
May cause harm to infants
H370
Harms organs (****) (**)
H371
May cause damage to organs (****) (**)
H372
Causes damage to organs (****) as a result of prolonged or repeated exposure (**)
H373
May cause damage to organs (****) as a result of prolonged or repeated exposure (**)
H400
Highly toxic to aquatic organisms
H401
Toxic to aquatic organisms
H402
Harmful to aquatic organisms
H410
Highly toxic to aquatic organisms with long-term effects
H411
Toxic to aquatic organisms with long-term effects
H412
Harmful to aquatic organisms with long-term effects
H413
May cause long-term harmful effects on aquatic organisms
H420
Damages human health and the environment by destroying the ozone layer in the upper atmosphere