61
Risk
Assessment
Guidance
Mercury
and
cadmium
Mercury
Hg
(200.59)
Cadmium
Cd
(112.411)
Both:
Fatal
if
inhaled
[H330].
Causes
damage
to
organs
through
prolonged
or
repeated
exposure
[H372].
Very
toxic
to
aquatic
life
with
long
lasting
effects
[H400/H410].
Mercury:
May
damage
the
unborn
child
[H360D].
Cadmium:
Suspected
of
causing
genetic
defects
[H341].
May
cause
cancer
[H350].
Suspected
of
damaging
fertility.
Suspected
of
damaging
the
unborn
child
[H361fd].
Mercury
is
dangerous
in
contact
with:
• ALKALI
METALS,
BROMINE,
CHLORINE.
A
violent
reaction
can
occur.
• ALUMINIUM.
Ignition
may
occur.
• AMMONIA.
Explosive
solids
form
after
a
period
of
contact.
DANGER
WEL
(mg
m-‐3):
0.02
(LTEL),
0.06
(STEL);
mercury;
0.025
(LTEL),
0.075
(STEL),
Carc;
cadmium
Storage
code:
T
• Mercury
(silvery-‐grey
liquid):
Use
plastic
bottles
and
only
fill
to
one-‐third
of
their
volume.
Do
not
Storage
attempt
to
clean
mercury
yourself,
except
to
remove
surface
dirt/dust
by
shaking
with
sticky
tape
in
a
strong
bottle
or
to
remove
surface
water
using
filter
paper.
• Cadmium
(silvery-‐white
solid):
an
exhibition
sample
may
be
kept
in
a
closed
container.
Follow
standard
procedures
(see
Emergency
Hazcards
and
GL
120).
NOTE
for
mercury:
• If
swallowed:
Call
111
and
follow
the
advice.
• Spills
on
skin
or
clothes:
Remove
contaminated
clothing.
Carefully
wash
any
contaminated
area(s).
Emergencies
Check
jewellery
and
consult
a
jeweller
if
silver-‐coloured
staining
(mercury
amalgam)
is
found.
• General
spills:
For
details
see
Mercury
spills
(CLEAPSS
website).
Contact
CLEAPSS
if
you
need
further
advice.
Retain
all
residues,
contaminated
cloths
and
gloves
for
collection
and
disposal
by
a
Registered
Waste
Carrier.
See
Disposal
on
reverse.
Read
this
Hazcard
in
conjunction
with
About
Hazcards
(guide
GL
120)
Hazcards
2016
Edition
©CLEAPSS
(Updated:
09/16)
61
Risk
Assessment
Guidance
Mercury
and
cadmium
Detailed
guidance
on
specific
activities
and
techniques
involving
these
substances
can
be
found
at:
www.cleapss.org.uk
General
use
of:
Hazard
information
User
Suggested
general
control
measures
and
guidance
• Have
a
mercury
spills
kit
to
hand
whenever
mercury-‐containing
measuring
devices
or
mercury
itself
are
used.
Clear
spills
promptly.
• Wear
eye
protection
as
required
by
the
activity.
TT
• Remove
jewellery/watches
and/or
wear
gloves.
Mercury
(Y12)
• Wash
hands
thoroughly
after
safely
disposing
of
gloves.
• Do
not
expose
the
metal
to
the
open
air
for
long
periods
(vapour
risk).
DANGER
(See
reverse)
• Never
heat
mercury
except
in
an
efficiently-‐working
ducted
fume
cupboard.
• Do
not
use
mercury
thermometers
in
ovens
or
incubators.
Serious
poisoning
is
very
rare
in
schools.
• Do
not
use
mercury
to
fill
gaps
between
a
thermometer
and
any
apparatus
The
risk
is
mainly
to
technicians
or
teachers
being
heated
(eg,
the
metal
block
in
calorimetry/melting-‐point
apparatus;
exposed
over
long
periods
of
time
to
low
Quickfit
apparatus).
vapour
concentrations
from
spilt
mercury
Other
notes;
see
also
detailed
activity-‐specific
guidance:
that
was
not
cleared
up.
• Thermometers
and
other
measuring
devices:
If
concerned,
seek
medical
advice.
• For
temperature
measurements,
use
alternatives
such
as
spirit
CLEAPSS
offers
a
mercury
monitoring
thermometers
or
digital
temperature
probes/data
loggers
where
possible.
service
(fee
charged)
but
note
that
• Although
m ercury-‐containing
m easuring
devices
are
no
longer
available
monitoring
is
needed
only
if
there
is
the
possibility
of
concealed
mercury
(eg,
after
a
for
purchase,
those
already
held
in
schools
may
still
be
used
if
necessary
major
spill,
in
an
old
building
etc).
(eg,
thermometers
for
some
melting
point
determinations).
Follow
general
guidance
in
About
Hazcards
(GL
120).
NOTE:
Disposal
• W1,
W2
only:
Retain
all
mercury-‐containing
waste
for
specialist
disposal
by
a
Registered
Waste
Carrier.
This
includes
small
amounts
in
threads
of
broken
thermometers,
etc.
Keep
secure
in
sealed
bags/plastic
bottles.
Read
this
Hazcard
in
conjunction
with
About
Hazcards
(guide
GL
120)
Hazcards
2016
Edition
©CLEAPSS
(Updated:
09/16)