flinnsci.com CHEMICALS SAVE ON HAZMAT FEES 79
Potassium Nitrate Solution
(as KNO3)
0.5 Molar P0173 500 mL $11.39
Storage: Inorganic #3
Disposal: #26b
Shelf Life: Good
Color and Odor: Colorless, odorless liquid.
Potassium Nitrite
crystal
KNO2
F.W. 85.11
Reagent P0108 100 g $28.33
Laboratory grade P0280 100 g $23.00
HAZARD ALERT: Strong oxidant; fire and ex plosion risk when heated or
in contact with organic material; skin irritant; highly toxic. LD50 200 mg/kg.
Storage: Inorganic #3
Disposal: #12b
Shelf Life: Fair; hygroscopic; store in a Flinn Chem-Saf ™ Bag.
Soluble: Water; not alcohol.
Color and Odor: Very light yellow, odorless solid.
CAS No. 7758-09-0
Potassium Oxalate
laboratory grade, crystal
K2C2O4•H2O
F.W. 184.24
P0075 500 g $23.92
Storage: Inorganic #2
Disposal: #26a
Shelf Life: Efflorescent in warm, dry air; keep tightly capped; store in a Flinn
Chem-Saf ™ Bag.
Soluble: Water
Color and Odor: Off-white, odorless solid.
CAS No. 6487-48-5
Potassium Permanganate
reagent grade, crystal
KMnO4
F.W. 158.04
P0077 100 g $ 9.89
P0078 500 g 21.23
HAZARD ALERT: Powerful oxidizing agent; may react violently with
easily oxidized substances and can explode on sudden heating in a closed
container; common cause of eye accidents; wear face protection. Strong skin
irritant; slightly toxic by ingestion. LD50 1090 mg/kg.
Storage: Inorganic #8
Disposal: #12a
Shelf Life: Indefinite
Soluble: Water, alcohol, and methyl alcohol; decomposes in water.
Color and Odor: Gray/black, odorless solid.
CAS No. 7722-64-7
Potassium Permanganate Solution
(as KMnO4)
0.2 Molar P0239 500 mL $7.66
0.1 Molar P0175 500 mL 8.76
HAZARD ALERT: Solution may be a skin irritant.
Storage: Inorganic #8
Disposal: #12a
Shelf Life: Fair to poor.
Color and Odor: Dark purple, odorless liquid.
Potassium Phosphate, Monobasic
reagent grade, crystal
KH2PO4
F.W. 136.09
P0141 100 g $15.21
P0081 500 g 31.07
Storage: Inorganic #2
Disposal: #26a
Shelf Life: Poor; hygroscopic.
Soluble: Water; not alcohol.
Color and Odor: White, odorless solid.
CAS No. 7778-77-0
Potassium Phosphate, Tribasic
reagent grade, powder
K3PO4•nH2O
F.W. 212.27
(as K3PO4)
P0083 100 g $27.68
Potassium Phosphate, Tribasic continued
HAZARD ALERT: Slightly toxic; severe body tissue irritant. LD50
1450 mg/kg.
Storage: Inorganic #2
Disposal: #26a
Shelf Life: Poor unless stored under dry conditions; hygroscopic; store in a
Flinn Chem-Saf ™ Bag.
Soluble: Water—giving a strongly basic solution; insoluble in alcohol.
Color and Odor: White, odorless solid.
CAS No. 7778-53-2
Potassium Sodium Tartrate
Rochelle salt
reagent grade, crystal
KNaC4H4O6•4H2O
F.W. 282.23
P0084 100 g $13.06
P0085 500 g 26.18
Storage: Inorganic #2
Disposal: #26a
Shelf Life: Fair to poor; efflorescent; store in a Flinn Chem-Saf ™ Bag.
Soluble: Water; not alcohol.
Color and Odor: White, odorless solid.
CAS No. 6381-59-5
Potassium Sulfate
K2SO4
F.W. 174.27
Reagent P0086 500 g $28.65
crystal
Laboratory grade P0087 100 g $ 9.83
powder P0088 500 g 20.43
Storage: Inorganic #2
Disposal: #26a
Shelf Life: Indefinite
Soluble: Water; not alcohol.
Color and Odor: White, odorless solid.
CAS No. 7778-80-5
Potassium Thiocyanate
crystal
KSCN
F.W. 97.18
Reagent P0225 50 g $11.60
P0089 100 g 16.12
P0090 500 g 50.69
Laboratory grade P0281 100 g $13.97
HAZARD ALERT: Moderately toxic by ingestion; emits toxic fumes of
cyanide if strongly heated or in contact with concentrated acids. Decomposes
to NO and HCN in the presence of dilute nitric acid. LD50 854 mg/kg.
Storage: Inorganic #7
Disposal: #26a
Shelf Life: Substance deliquescent; store in a Flinn Chem-Saf ™ Bag.
Soluble: Water, alcohol, and acetone.
Color and Odor: White, odorless solid.
CAS No. 333-20-0
Reduce Fire Risk
1. Store chemicals in chemically compatible families.
2. Buy and store the minimum quantity of flammables.
3. Store flammables in dedicated flammables cabinets.
4. Provide good ventilation in chemical stores areas.
5. Use water baths, heating mantles and hot plates rather than Bunsen
burners or alcohol burners, if possible.
6. Buy and store flammables in metal packages and plastic or PVC-coated
bottles rather than glass.
7. Dispose of waste solvents responsibly.
Continued on next column.
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