Explanation R Phrases

R1:

Explosive when dry.

R2:

Risk of explosion by shock, friction, fire or other sources of ignition.

R3:

Extreme risk of explosion by shock, friction, fire or other sources of ignition.

R4:

Forms very sensitive explosive metallic compounds.

R5

Heating may cause an explosion.

R6

Explosive with or without contact with air.

R7:

May cause fire.

R8:

Contact with combustible material may cause fire.

R9:

Explosive when mixed with combustible material.

R10:

Flammable

R11:

Highly flammable

R12:

Extremely flammable

R14:

Reacts violently with water.

R15:

Contact with water liberates extremely flammable gases.

R16:

Explosive when mixed with oxidizing substances.

R17:

Spontaneously flammable in air.

R18:

In use, may form flammable/explosive vapour-air mixture.

R19:

May form explosive peroxides.

R20:

Harmful by inhalation.

R21:

Harmful in contact with skin.

R22:

Harmful if swallowed.

R23:

Toxic by inhalation.

R24:

Toxic in contact with skin.

R25:

Toxic if swallowed.

R26:

Very toxic by inhalation.

R27:

Very toxic in contact with skin

R28:

Very toxic if swallowed.

R29:

Contact with water liberates toxic gas.

R30:

Can become highly flammable in use.

R31:

Contact with acids liberates toxic gas.

R32:

Contact with acids liberates very toxic gas.

R33:

Danger of cumulative effects.

R34:

Causes burns.

R35:

Causes severe burns.

R36:

Irritating to eyes.

R37:

Irritating to respiratory system.

R38:

Irritating to skin.

R39:

Danger of very serious irreversible effects.

R40:

Possible risk of cancer.
CAUTION: Until 2001 this R-phrase was used for possible mutagenic or teratogenic risks as well. These risks are now labelled with R68!

R41:

Risk of serious damage to eyes.

R42:

May cause sensitization by inhalation.

R43:

May cause sensitization by skin contact.

R44:

Risk of explosion if heated under confinement.

R45:

May cause cancer.

R46:

May cause heritable genetic damage.

R48:

Danger of serious damage to health by prolonged exposure.

R49:

May cause cancer by inhalation.

R50:

Very toxic to aquatic organisms.

R51:

Toxic to aquatic organisms.

R52:

Harmful to aquatic organisms.

R53:

May cause long-term adverse effects in the aquatic environment.

R54:

Toxic to flora.

R55:

Toxic to fauna.

R56:

Toxic to soil organisms.

R57:

Toxic to bees.

R58:

May cause long-term adverse effects in the environment.

R59:

Dangerous for the ozone layer.

R60:

May impair fertility.

R61:

May cause harm to the unborn child.

R62:

Possible risk of impaired fertility.

R63:

Possible risk of harm to the unborn child.

R64:

May cause harm to breastfed babies.

R65:

Harmful: may cause lung damage if swallowed.

R66:

Repeated exposure may cause skin dryness or cracking.

R67:

Vapours may cause drowsiness and dizziness.

R68:

Possible risks of irreversible effects.