Page 106 - Demo

Chemicals
Starch, Potato
Storage: Organic miscellaneous Disposal: #26a
Shelf Life: Indefinite if kept dry. Soluble: Water
Color and Odor: White, odorless solid. Starch, Spray
Storage: Miscellaneous nonhazardous organic material. Shelf Life: Indefinite
Soluble: Water
Color and Odor: White, odorless spray.
Technical Note: Starch solution as an indicator for iodine can easily be made using spray starch. Generously spray the starch into the desired quantity of water and stir. Prepare as needed since starch solutions have a poor shelf life.
Starch Solution
Storage: Miscellaneous nonhazardous organic material.
Disposal: #26b
Shelf Life: Poor; deteriorates over time depending on storage conditions.
Color and Odor: Colorless, odorless liquid.
Stearic Acid
Storage: Organic #1
Disposal: #26a
Shelf Life: Indefinite
Soluble: Many organic solvents; not water.
Color and Odor: Off-white solid with faint wax odor. CAS No. 57-11-4
Technical Note: Laboratory grade stearic acid is actually 50% stearic acid and 45% palmitic acid; melting point is 55–56 °C. Reagent grade is >95% stearic acid: melting point is 67–69 °C. The reagent grade is a better choice for melting point labs.
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powder
ACS Reagent
S0122
100 g
$17.95
starch soluble for iodometry
S0123
500 g
59.95
Laboratory grade
S0125
500 g
$14.25
size 00, 16 pads
S0128
300 g
$8.60
S0302
20 oz. can
$6.65
E-stilbene, 1,2-diphenylethylene, bibenzal reagent grade, 98%; crystalline powder
C6H5CH=CHC6H5 F.W. 180.25
S0460
25 g
$27.65
0.5%, aqueous
S0151
500 mL
$9.65
octadecanoic acid powder CH3(CH2)16COOH F.W. 284.49
Reagent
S0335
100 g
$ 9.00
S0336
500 g
17.40
Laboratory grade
S0356
250 g
$12.90
S0126
500 g
19.25
reagent grade, crystal
SrBr2•6H2O F.W. 355.52
S0376
25 g
$14.15
crystal SrCl2 • 6H2O F.W. 266.64
Reagent
S0357
25 g
$ 5.80
S0129
100 g
11.05
S0130
500 g
33.60
Laboratory grade
S0440
100 g
$ 9.10
S0441
500 g
27.40
Steel, Shot
Storage: Inorganic #1 Disposal: #26a
Shelf Life: Indefinite
STEEL, SHOT continued
Soluble: Insoluble in common chemicals.
Color and Odor: Gray, odorless solid.
Technical Note: Steel shot are irregularly shaped steel pieces, not small, evenly sized spheres.
Steel, Wool
 HAZARD ALERT: Steel wool is a flammable solid. Avoid contact with flames and electricity. Steel wool may spontaneously ignite upon contact with the leads on a typical dry-cell battery.
Storage: Inorganic #1
Disposal: #26a
Shelf Life: Indefinite; will quickly oxidize if stored in a corrosive environment.
Soluble: Easily in common mineral acids.
Color and Odor: Gray, odorless solid.
Technical Note: To remove protective coating, soak steel wool in acetone for a few minutes.
trans-Stilbene
 HAZARD ALERT: Moderately toxic by ingestion; harmful if swal- lowed. Causes serious eye irritation. May cause skin and respiratory tract irritation and asthma-like symptoms.
Storage: Organic #3
Disposal: #18b
Shelf Life: Fair; store in a cool, dry place away from sunlight. Soluble: Alcohol and ether; insoluble in water.
Color and Odor: White crystalline powder; odorless.
Technical Note: Undergoes photochemical reaction (oxidation) with air and sunlight.
CAS No. 103-30-0
Strontium Bromide
 HAZARD ALERT: Slightly toxic by ingestion and inhalation. Storage: Inorganic #2
Disposal: #26a
Shelf Life: Poor; deliquescent; store in a Flinn Chem-Saf TM Bag. Soluble: Water and alcohol.
Color and Odor: White, odorless solid. CAS No. 7789-53-9
Strontium Chloride
 HAZARD ALERT: Slightly toxic by ingestion. LD50 2250 mg/kg (for anhydrous salt).
Storage: Inorganic #2
Disposal: #26a
Shelf Life: Fair to poor; effloresces in air; deliquesces in moist air; store in a Flinn Chem-Saf TM Bag.
Soluble: Water and alcohol.
Color and Odor: White, odorless solid.
CAS No. 10025-70-4
S0127
500 g
$9.20
Continued on next column.
Your Biosystem
As you think about toxicity, try to think about ease of entry into your biosystem.
1. Gases or vapors are absorbed more rapidly than liquids. 2. Liquids, in turn, are absorbed more rapidly than solids.
If you think about the physical property of the hazard, that will help you to take protective measures.