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“We must trust to nothing but facts: These are presented to us by Nature, and cannot deceive. We ought, in every instance, to submit our reasoning to the test of experiment, and never to search for truth but by the natural road of experiment and observation.” ― Antoine Lavoisier, Elements of Chemistry

Thursday, 1 August 2013

Hazard Warning Symbols

chemistry - checkpoint 
Hazard Warning Symbols

FLAMMABLE
(can easily ignite and burn: benzene, ethanol)











RADIOACTIVE
Give off harmful rays that can kill living cells: uranium, radium
EXPLOSIVE 
Chemicals that explode: toluene
 DANGEROUS FOR THE ENVIRONMENT
Chemicals that may present an immediate or delayed danger to one or more components of the environment
CORROSIVE
Destroy living tissue, including the skin and eyes: concentrated acid, oven cleaner
 OXIDSING
The substance provides oxygen.
Other materials will burn more fiercely in its presence.

 HARMFULL/IRRITANT
Involved a health risk or irritate the skin: dilute acid, alkalis, thinner

TOXIC / POISON 

poisonous if breathed, absorbed through the skin: alcohol, mercury

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