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Safety Symbols
Nelson Science Page 601
HHPS (Hazardous Household Products Symbols)
This is a set of symbols that warn consumers
(people who buy products) what dangers the
product may contain. These symbols are
mandatory for all chemical products They
MUST be drawn on the labels of all chemical
products. These symbols are classified as
follows:
Symbol Meaning Description
Poisonous A substance that can
cause immediate damage to
any living organism.
Flammable A substance that can
catch fire very easily.
Explosive A substance that can
explode very easily if
heated or dropped.
Corrosive A corrosive substance is
one that can easily burn
through other pieces of
matter.
The HHPS system not only uses these
four symbols, but it also describes to us
how severe the danger is.
Shape Colour Meaning Example
Red Extremely
Dangerous
This substance is
extremely poisonous.
This may kill an
organism.
Orange Dangerous This substance
may ignite
(set on fire).
Yellow Caution This substance is
mildly corrosive. It
may burn through
paper or irritate skin
WHMIS (Workplace Hazardous Materials
Information System )
• WHMIS (pronounced wim-is) is another
system developed by scientists is mandatory
in any employment setting, from factories and
chemical plants to homes and schools. It is a
program that all employees must be made
aware of. If you currently have a part-time
job, you most likely will be taking a seminar in
WHMIS. Similar to HHPS, WHMIS also uses
safety symbols to let users know what
dangers the chemical may possess.
Symbol Meaning Description
Compressed
Gas
A gas is under very
high pressure inside of
its container and
therefore may explode
easily.
Flammable and
Combustible
Same meaning as in the
HHPS category.
Oxidizing
Material
Contains highly
reactive oxidizing agent.
(more dangerous than
the oxygen we breathe).
Corrosive
Material
Same meaning as in
HHSP.
Symbol Meaning Description
Dangerously
Reactive
Material
Can combine with almost any
chemical around it and cause a
potentially dangerous reaction.
Biohazardous
Infectious
Substance from living
tissue/cells and natural waste
products.
Poisonous and
Infectious
Substance is very toxic and
may be fatal (cause death).
Effect is more instant.
Poisonous and
Infectious
Substance causes effects
that are more prolonged and
longer lasting.
Practice questions & activities
•w/b page 1 abc’s of lab safety - group
•w/b page 2 An Unsafe Laboratory – group
•w/b page 3, 4, 5, 6
Practice questions & activities
•w/b page 1 abc’s of lab safety - group
•w/b page 2 An Unsafe Laboratory – group
•w/b page 3, 4, 5, 6

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Grade 9, U1-L1, Safety Symbols

  • 2. HHPS (Hazardous Household Products Symbols) This is a set of symbols that warn consumers (people who buy products) what dangers the product may contain. These symbols are mandatory for all chemical products They MUST be drawn on the labels of all chemical products. These symbols are classified as follows:
  • 3. Symbol Meaning Description Poisonous A substance that can cause immediate damage to any living organism. Flammable A substance that can catch fire very easily. Explosive A substance that can explode very easily if heated or dropped. Corrosive A corrosive substance is one that can easily burn through other pieces of matter.
  • 4. The HHPS system not only uses these four symbols, but it also describes to us how severe the danger is.
  • 5. Shape Colour Meaning Example Red Extremely Dangerous This substance is extremely poisonous. This may kill an organism. Orange Dangerous This substance may ignite (set on fire). Yellow Caution This substance is mildly corrosive. It may burn through paper or irritate skin
  • 6. WHMIS (Workplace Hazardous Materials Information System ) • WHMIS (pronounced wim-is) is another system developed by scientists is mandatory in any employment setting, from factories and chemical plants to homes and schools. It is a program that all employees must be made aware of. If you currently have a part-time job, you most likely will be taking a seminar in WHMIS. Similar to HHPS, WHMIS also uses safety symbols to let users know what dangers the chemical may possess.
  • 7. Symbol Meaning Description Compressed Gas A gas is under very high pressure inside of its container and therefore may explode easily. Flammable and Combustible Same meaning as in the HHPS category. Oxidizing Material Contains highly reactive oxidizing agent. (more dangerous than the oxygen we breathe). Corrosive Material Same meaning as in HHSP.
  • 8. Symbol Meaning Description Dangerously Reactive Material Can combine with almost any chemical around it and cause a potentially dangerous reaction. Biohazardous Infectious Substance from living tissue/cells and natural waste products. Poisonous and Infectious Substance is very toxic and may be fatal (cause death). Effect is more instant. Poisonous and Infectious Substance causes effects that are more prolonged and longer lasting.
  • 9. Practice questions & activities •w/b page 1 abc’s of lab safety - group •w/b page 2 An Unsafe Laboratory – group •w/b page 3, 4, 5, 6
  • 10. Practice questions & activities •w/b page 1 abc’s of lab safety - group •w/b page 2 An Unsafe Laboratory – group •w/b page 3, 4, 5, 6