2B
Aluminium compounds: except chlorides and bromide
Aluminium nitrate(V)-9-water
Oxidising
Irritant
O
I
Al(NO3)3.9H2O
R8: Contact with combustible material may cause fire.
R36/38: Irritating to eyes and skin.
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Solutions equal to or stronger than 0.5 mol dm should be labelled IRRITANT.
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WEL (mg m ): 2 (LTEL), 6 (STEL).
Store: Ox
It can absorb water from the atmosphere to give an acidic
solution.
Disposal: W1, W7
W7:
Solutions should be diluted to less than
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0.2 mol dm .
Aluminium ammonium sulfate(VI)-12-water; ammonium alum;
AlNH4(SO4)2.12H2O
Aluminium ethanoate; aluminium acetate; Al(CH3COO)3
Aluminium oxide; Al2O3
Aluminium potassium sulfate(VI)-12-water; alum; AlK(SO4)2.12H2O
Aluminium sulfate(VI)-16-water; aluminium sulfate(VI);
Al2(SO4)3.16H2O
For emergencies, see Hazcard E as well as more detailed information which may be on this Hazcard.
Low hazard
Store: GIn
Disposal:
W7, W8
Disposal:
W8
Disposal:
W8
Disposal:
W7, W8
Disposal:
W7, W8
© CLEAPSS 2007
2B
Aluminium compounds: except chlorides and bromide
Activity
Use of
aluminium salt
solutions
Crystallisation
of alum
User
Y7
Control measures
Wear eye protection.
Y7
Wear eye protection.
Preparation of
alum
Y9
Wear goggles.
Heating
hydrated
aluminium
nitrate(V) and
sulfate(VI)
Y9
Wear eye protection.
Model risk assessments
Experimental points
Use 0.1 mol dm aluminium sulfate(VI) or nitrate(V) solution.
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Solutions of aluminium compounds are acidic (0.1 mol dm
solution is pH 3).
See also Recipe card 3. Solutions of aluminium compounds are
acidic (about pH 3). Alum is very soluble at high temperatures
(94 g in 100 g of water at 80 °C) but much less so at room
temperature (12 g in 100 g of water at 20 °C).
The procedure involves dissolving 1 g of aluminium foil in
3
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25 cm of 1 mol dm potassium hydroxide (CORROSIVE). After
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3
filtering, 1 mol dm sulfuric(VI) acid is added (about 25 cm )
until the precipitate of aluminium hydroxide dissolves. The
solution is boiled and the saturated solution is allowed to
crystallise.
Disposal: crystals, W3.
Use 0.5 g per group unless the heating is carried out in a fume
cupboard. Aluminium nitrate(V) produces nitrogen dioxide
(TOXIC). Aluminium sulfate(VI) and alum produce sulfur trioxide
(CORROSIVE).
Disposal: glass test tubes with residue, W8.
For emergencies, see Hazcard E as well as more detailed information which may be on this Hazcard.
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© CLEAPSS 2007