Page 37 - Demo

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CHROMIUM NITRATE continued
HAZARD ALERT: Strong oxidizer; avoid contact with organic
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materials; slightly toxic by ingestion. LD50 3250 mg/kg. Storage: Inorganic #3
Disposal: #27f
Shelf Life: Good.
Soluble: Water and alcohol.
Color and Odor: Metallic gray/black, odorless solid. CAS No. 7789-02-8
CHROMIUM TRIOXIDE continued
 HAZARD ALERT: Known carcinogen. Corrosive to skin; highly
toxic; powerful oxidizing agent. Avoid contact with reducing agents and organic material. Possible reproductive/fertility hazard. Practice strict hygiene in the use of this substance. LD50 80 mg/kg.
Storage: Inorganic #4
Disposal: #12a
Shelf Life: Poor (deliquescent); store in a Flinn Chem-Saf TM Bag and then inside a Flinn Saf-StorTM Can.
Soluble: Water, alcohol, and mineral acids.
Color and Odor: Rose/red, odorless solid.
CAS No. 1333-82-0
Incompatibility: Reducing agents or organics; violent reaction possible.
Chromium Nitrate Solution
0.1 Molar
(as Cr(NO3)3•9H2O) Storage: Inorganic #3
Disposal: #27f
Shelf Life: Indefinite
Color and Odor: Gray, odorless liquid.
Chromium Oxide
C0379 500 mL
$14.80
chromium(III) oxide, chromic oxide, chromium sesquioxide
Storage: Miscellaneous, nonhazardous organic material.
Disposal: #26a
Shelf Life: Good if stored properly. Store in a cool (<10 °C) and dry place in a closed container.
Soluble: Water
Color and Odor: Buff solid with malty odor.
Technical Note: Used for cheese-making demonstrations and experiments. Prepare solutions fresh: dissolve 0.3 g chymosin in 100 mL of bottled water. Use two drops of solution per 10-mL sample size of milk. Optimum temperature for enzyme activity is 40 oC. Two grams of C0419 should be enough to coagulate more than 100 L of milk!
reagent Cr2O3
F.W. 152.02
C0224 100 g
$17.55
 HAZARD ALERT: Body tissue irritant.
Storage: Inorganic #4 inside a Flinn Chem-Saf TM Bag. Disposal: #26a
Shelf Life: Indefinite
Soluble: Insoluble in water, acids or alkalis.
Color and Odor: Light green, odorless solid.
CAS No. 1308-38-9
Chromium Potassium Sulfate
chromium(III) potassium sulfate, chrome alum
Cinnamaldehyde
C6H5CH=CHCHO F.W. 132.16
C0400 100 mL
$12.60
reagent, crystal CrK(SO4)2•12H2O F.W. 499.43
C0205 100 g
$22.05
HAZARD ALERT: Body tissue irritant; combustible. LD50 2220 mg/kg.
Storage: Organic #3
Disposal: #2
 HAZARD ALERT: Body tissue irritant.
Storage: Inorganic #2
Disposal: #27f
Shelf Life: Fair to poor; substance efflorescent; store in a Flinn Chem-Saf TM Bag.
Shelf Life: Fair; protect from light; keep tightly closed. Soluble: Alcohol
Color and Odor: Pale yellow liquid with cinnamon odor. CAS No. 104-55-2
Chymosin
natural enzyme coagulant for cheese-making powder
C0419 5 g
$12.00
Soluble: Water
Color and Odor: Metallic purple, odorless solid. CAS No. 7788-99-0
Chromium Sulfate
chromium(III) sulfate reagent, crystal Cr2(SO4)3•15H2O F.W. 662.39
trans–Cinnamic Acid
3-phenyl-2-propenoic acid,(E) reagent
C9H8O2
F.W. 148.159
C0401 500 g
$86.00
 HAZARD ALERT: Body tissue irritant. Storage: Inorganic #2
Disposal: #27f
Shelf Life: Indefinite
Soluble: Water
Color and Odor: Light green, odorless solid. CAS No. 10101-53-8
Chromium Trioxide
chromium(VI) oxide, chromic acid laboratory grade
CrO3 C0206 F.W. 100.01
100 g
$23.60
Citric Acid
monohydrate reagent, crystal C6H8O7•H2O F.W. 210.15
C0231 100 g C0065 500 g
$ 6.65 19.95
C0063
100 g
$24.85
 HAZARD ALERT: Causes skin and serious eye irritation. May cause respiratory irritation.
Storage: Organic #1
Disposal: #26a
Shelf Life: Good
Soluble: Very soluble in ethanol; soluble in diethyl ether, acetone, and benzene.
Color and Odor: Tan, odorless.
CAS No. 140-10-3
Continued on next column.
CITRIC ACID continued on next page.