flinnsci.com CHEMICALS SAVE ON HAZMAT FEES 29
Aluminum Potassium Sulfate
alum, crystal
AlK(SO4)2•12H2O
F.W. 474.39
Reagent A0032 500 g $ 21.34
A0033 2 kg 42.33
Laboratory grade A0180 500 g $10.24
A0181 2 kg 30.37
Storage: Inorganic #2
Disposal: #26a
Shelf Life: Indefinite
Soluble: Water; not alcohol.
Color and Odor: White, odorless solid.
CAS No. 7784-24-9
Aluminum Sulfate
Al2(SO4)3•18H2O
F.W. 666.42
Reagent A0035 500 g $19.19
crystal
HAZARD ALERT: Severe eye irritant.
Storage: Inorganic #2
Disposal: #26a
Shelf Life: Indefinite
Soluble: Water; not alcohol.
Color and Odor: White, odorless solid.
CAS No. 17927-65-0
Technical Note: The laboratory grade is approximately 18H2O, contains
about 0.3% iron, and is a tan or brown color.
Amino Acids
see individual listings, e.g., Alanine
Amino Acid Collection
A complete “sampler” collection of the 20
naturally occuring amino acids—alanine,
arginine, aspartic acid, asparagine, cysteine, glycine, glutamic acid, glutamine,
histidine, isoleucine, leucine, methionine, lysine, phenylalanine, serine, threonine,
tryptophan, tyrosine, valine and cystine. 1 g each. Useful for biochemistry
activities, such as amino acid chromatography, acid–base studies, qualitative
tests for proteins and amino acids. Perfect for cooperative class projects!
AP7238 20 x 1 g $91.16
5-Amino-2,3-Dihydro-1,4-Phthalazinedione
see Luminol
Ammonia, Concentrated
see Ammonium Hydroxide and Ammonium Hydroxide solutions
Ammonium Carbonate
reagent, lump
(NH4)2CO3
F.W. 96.09
A0226 100 g $12.04
A0043 500 g 19.08
Storage: Inorganic #4
Disposal: #26a
Shelf Life: Indefinite
Soluble: Water (decomposes in hot water).
Color and Odor: White solid with strong ammonia odor.
CAS No. 506-87-6
Technical Note: Decomposes to ammonia and carbon dioxide at temperatures
over 58 °C (136 °F).
Ammonium Chloride
sal ammoniac
granular
NH4Cl
F.W. 53.49
Reagent A0266 100 g $ 7.36
A0044 500 g 13.71
Laboratory grade A0045 500 g $ 9.14
A0046 2 kg 23.22
HAZARD ALERT: Slightly toxic by ingestion. LD50 1650 mg/kg.
Storage: Inorganic #2
Disposal: #26a
Shelf Life: Fair to poor; hygroscopic; store in a Flinn Chem-Saf ™ Bag.
Soluble: Water and glycerol; slightly in alcohol.
Color and Odor: White, odorless solid.
CAS No. 12125-02-9
Ammonium Chloride Solution
1 Molar
(as NH4Cl) A0278 500 mL $6.32
Storage: Inorganic #2
Disposal: #26b
Shelf Life: Indefinite
Color and Odor: Colorless, odorless liquid.
Ammonium Dichromate
reagent, crystal
(NH4)2Cr2O7
F.W. 252.06
A0048 500 g $28.70
HAZARD ALERT: Known carcinogen. Very strong oxidizing agent; dangerous
fire risk; dusts and solutions are toxic; irritant to eyes and skin. Possible
reproductive/fertility hazard.
Storage: Inorganic #8
Disposal: #12a
Shelf Life: Fair; decomposes with slight heating; keep away from all organic
materials.
Soluble: Water and alcohol.
Color and Odor: Orange, odorless solid.
CAS No. 7789-09-5
Incompatibility: Reducing agents, such as powdered metals, form an
explosive mixture with magnesium metal powder. Avoid contact with oxidizable
(flammable) organic compounds.
SPECIAL HAZARD ALERT: The “volcano” experiment or demonstration
is a popular use of ammonium dichromate. When heated to decomposition,
ammonium dichromate produces nitrogen, water, and chromium(III) oxide.
Chromium compounds are known carcinogens. Because of this risk, the
“volcano” demonstration should be conducted under a well-ventilated hood
or outdoors. This demonstration should never be done in a closed, poorly
ventilated room. Strict hygiene should be observed before and after the
combustion.
Ammonium Dihydrogen Phosphate
see Ammonium Phosphate, Monobasic
Ammonium Ferrous Sulfate
see Ferrous Ammonium Sulfate
How Is Your Housekeeping?
OSHA standards state “all places of employment, passageways, storerooms
and service rooms shall be kept clear and orderly and in sanitary condition.”
Common sense says good housekeeping is an attitude and the cornerstone
of any good safety program. Safety inspectors check housecleaning practices
first. A clean lab is a safer lab.
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