Everything Science Grade 10

1.5 CHAPTER 1. SKILLS FOR SCIENCE

Sign Symbol Meaning Sign Symbol Meaning

E Explosive. Chem-

icals with this la-

bel explode easily.

An example is lead

azide.

F Flammable. Chem-

icals with this label

can catch fire easily.

Example: methanol

Xn Harmful. Chemi-

cals labelled with

this are gener-

ally considered to

be damaging to

humans.

Xi Irritant. Chemi-

cals with this label

cause irritation to

your eyes and skin.

An example is hy-

drogen peroxide.

O Oxidising. Chemi-

cals with this label

contain oxygen

that may cause

other materials to

combust. An ex-

ample is potassium

dichromate.

T Toxic. Chemicals

with this label are

highly toxic. An ex-

ample is mercury.

Notes and information ESAU

You can find safety data sheets athttp://www.msds.com/. You should always look at these
data sheets anytime you work with a new chemical. These data sheets contain information
about how to work with chemicals and what dangers the chemicals pose to you and the
environment. You should always try dispose of chemicals correctly and safely. Many
chemicals cannot simply be washed down the sink.

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