Page 87 - Demo

“Your Safer Source for Science”
POTASSIUM CHLORIDE SOLUTION continued
Storage: Inorganic #2
Disposal: #26b
Shelf Life: Good
Color and Odor: Colorless, odorless liquid.
Potassium Chromate
 HAZARD ALERT: Known carcinogen. Highly toxic; harmful to skin, eyes, and respiratory tract; corrosive action on skin and mucous membranes. Possible reproductive/fertility hazard. Chromates as a chemical family deserve special safety attention. LD50 (mouse) 180 mg/kg.
Storage: Inorganic #8 in a Flinn Chem-Saf TM Bag inside a locked poisons cabinet.
Disposal: #12a
Shelf Life: Indefinite
Soluble: Water; not alcohol.
Color and Odor: Yellow, odorless solid. CAS No. 7789-00-6
Potassium Chromate Solution
 HAZARD ALERT: Moderately toxic by ingestion; may be corrosive to body tissue. Possible reproductive/fertility hazard.
Storage: Inorganic #8
Disposal: #12a
Shelf Life: Good
Color and Odor: Yellow, odorless liquid.
Potassium Dichromate
 HAZARD ALERT: Known carcinogen. Strong oxidant; fire risk in contact with organic material; toxic by ingestion and inhalation; corrosive to body tissue. Possible reproductive/fertility hazard. LD50 190 mg/kg.
Storage: Inorganic #8 in a Flinn Chem-Saf TM Bag inside a locked poisons cabinet.
Disposal: #12a
Shelf Life: Indefinite
Soluble: Water; not alcohol.
Color and Odor: Orange, odorless solid. CAS No. 7778-50-9
Potassium Dichromate Solution
 HAZARD ALERT: Toxic by ingestion. Possible reproductive/fertility hazard.
Storage: Inorganic #8
Disposal: #12a
Shelf Life: Good
Color and Odor: Orange, odorless liquid.
Potassium Dihydrogen Phosphate
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Potassium Ferricyanide
 HAZARD ALERT: If heated or in contact with concentrated acids, poisonous fumes of hydrogen cyanide gas may evolve. Compound itself has slight toxicity. LD50 1600 mg/kg.
Storage: Inorganic #7
Disposal: #14. P-Listed (P030); purchase small amounts for effec- tive inventory control.
Shelf Life: Fair, but light-sensitive. Store in a Flinn Chem-Saf TM Bag. Soluble: Water; slightly in alcohol.
Color and Odor: Orange, odorless solid. CAS No. 13746-66-2
Potassium Ferricyanide Solution
For hazard alert, storage, disposal, etc.,
see Potassium Ferricyanide, P0050.
Color and Odor: Yellow/green, odorless liquid.
Potassium Ferrocyanide
 HAZARD ALERT: Dangerous if heated or if in contact with concen- trated acids since hydrogen cyanide gas may evolve. Slightly toxic by ingestion. LD50 6400 mg/kg (for anhydrous salt).
Storage: Inorganic #7
Disposal: #14. P-Listed (P030); purchase small amounts for effec- tive inventory control.
Shelf Life: Fair to poor; effloresces on exposure to air; keep tightly capped and store in a Flinn Chem-Saf TM Bag.
Soluble: Water; not alcohol.
Color and Odor: Light yellow, odorless solid. CAS No. 14459-95-1
Potassium Ferrocyanide Solution
For hazard alert, storage, disposal, etc.,
see Potassium Ferrocyanide, P0053.
Color and Odor: Light yellow, odorless liquid.
Potassium Hexacyanoferrate(II)
see Potassium Ferrocyanide
Potassium Hexacyanoferrate(III)
see Potassium Ferricyanide
Potassium Hydrogen Carbonate
see Potassium Bicarbonate
Potassium Hydrogen Phosphate
see Potassium Phosphate, Dibasic
potassium hexacyanoferrate(III) reagent grade, crystal
K3Fe(CN)6 F.W. 329.26
P0050
100 g
$10.70
P0051
500 g
35.05
reagent grade, crystal
K2CrO4 F.W. 194.21
P0207
25 g
$ 7.35
P0044
100 g
13.70
P0045
500 g
32.40
0.1 Molar
(as K3Fe(CN)6)
P0165
500 mL
$8.10
potassium hexacyanoferrate(II) reagent grade, crystal
K4Fe(CN)6•3H2O F.W. 422.41
P0053
100 g
$16.50
P0054
500 g
37.95
(as K2CrO4)
1 Molar
P0161
500 mL
$14.05
0.5 Molar
P0162
500 mL
11.30
0.1 Molar
P0163
500 mL
6.35
reagent grade, crystal
K2Cr2O7 F.W. 294.22
P0047
100 g
$13.95
P0048
500 g
35.90
0.1 Molar
(as K4Fe(CN)6•3H2O)
P0220
500 mL
$8.45
0.1 Molar
(as K2Cr2O7)
P0164
500 mL
$7.75
An Important “Don’t” About Potassium
If you do not know the age of your potassium metal, then DO NOT USE IT! It really is not worth the risk. Potassium reacts with oxygen in air to form a coating of yellow potassium super- oxide (KO2), even when the metal is stored under dry mineral oil. Old pieces of potassium are extremely dangerous. When the metal is cut, the pressure of the knife may set off a violent reac- tion between the superoxide coating and the metal.
see Potassium Phosphate, Monobasic