Page 94 - Demo

Chemicals
Schiff Reagent
 HAZARD ALERT: Body tissue irritant. Storage: Inorganic #2
Disposal: #26b
Shelf Life: Fair to good.
Color and Odor: Colorless liquid with strong rotten egg odor. Sebacoyl Chloride
HAZARD ALERT: Corrosive; fumes strongly irritating to eyes, lachrymator; toxic by ingestion and inhalation. LD50 400 mg/kg. Storage: Organic #1
Disposal: #1a
Shelf Life: Poor
Soluble: Hydrocarbons and ether; decomposes slowly in water. Color and Odor: Colorless liquid with suffocating acid odor. CAS No. 111-19-3
Sebacoyl Chloride/Hexane Solution
 HAZARD ALERT: Flammable liquid; dangerous fire risk. Storage: Organic #3 in a dedicated flammables cabinet. Disposal: #18b
Shelf Life: Indefinite
Color and Odor: Colorless liquid with suffocating acid odor. Technical Note: To prepare nylon you will also need hexameth- ylene diamine/sodium hydroxide solution (see page 388).
Seliwanoff Reagent
 HAZARD ALERT: Corrosive liquids.
Storage: Inorganic #9 in a dedicated acid cabinet Disposal: #24b
Shelf Life: Fair
Silica Gel
Storage: Inorganic #4
Disposal: #26a
Shelf Life: Good if kept dry.
Soluble: Generally insoluble.
Color and Odor: Blue, odorless solid.
CAS No. 7631-86-9
Technical Note: Turns from dark blue to a light pink when wet.
Continued on next column.
1-800-452-1261
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test for aldehydes
contains: basic fuchsin, sodium metabisulfite, hydrochloric acid, and water
S0180
100 mL
$15.60
(Packaged in PVC-coated bottles)
sebacyl chloride
laboratory grade COCl(CH2)8COCl F.W. 239.14
S0284
25 mL
$ 80.00
S0163
100 mL
204.85
(Both package sizes packaged in wax sealed, PVC-coated bottles)
Silica Gel
For storage, disposal, etc., see Silica Gel, S0212.
Technical Note: As mesh size goes up, particle size decreases e.g., 200 mesh are finer particles than 35 mesh.
Silicon
 HAZARD ALERT: Flammable in powder form. LD50 3160 mg/kg. TLV 10 mg/m3.
Storage: Inorganic #1
Disposal: #26a
Shelf Life: Indefinite
Soluble: Mixture of nitric and hydrofluoric acid and alkalies. Color and Odor: Gray, odorless solid.
CAS No. 7440-21-3
Silicone Oil
Storage: Inorganic miscellaneous.
Disposal: #26a
Shelf Life: Indefinite
Soluble: Insoluble in water; soluble in hydrocarbons. Color and Odor: Colorless, odorless.
CAS No. 63148-62-9
Technical Note: Greater working temperature and higher flashpoint than mineral oil. Less tendency to discolor or degrade upon heating than vegetable oil. Reusable almost indefinitely if uncontaminated. 250-mL size will fill five Thiele tubes.
Silver
Storage: Inorganic #1
Disposal: #27a
Shelf Life: Indefinite
Soluble: Nitric and hot sulfuric acids. Color and Odor: Silver, odorless solid. CAS No. 7440-22-4
for chromatography
35–60 Mesh
S0408
100 g
$42.40
100–200 Mesh
S0412
100 g
27.15
200–425 Mesh
S0410
100 g
25.55
laboratory grade Si
A.W. 28.09
Powder
S0012
500 g
$36.60
Lumps
S0342
100 g
$11.30
S0013
500 g
28.40
4 mL of sebacoyl chloride in 100 mL of hexane for nylon polymer experiment or demonstration
S0260
100 mL
$20.40
test solution for distinguishing glucose vs. fructose Contains 0.1%
resorcinol in 3M HCl
S0453
100 mL
$7.75
polymethylsiloxane
excellent heat transfer fluid for use in
hot oil baths or melting point Thiele tubes
S0451
250 mL
$19.25
6–20 mesh
blue, indicating general purpose
S0008
500 g
$23.25
reagent grade, Ag A.W. 107.87
S0270
5g
$ 50.30
S0014
10 g
91.35
Foil
S0015
25 g
191.25
0.005" x 2"
Shot
S0271
5g
$50.10
S0016
10 g
94.05
What Does LD50 Mean?
LD50 (lethal dose, 50% kill) is the dose that, when administered to test animals, kills half of them. The LD50 is expressed in milli- grams (mg) of substance per kilogram (kg) of animal body mass and the method by which the toxicant was administered (e.g., oral, intravenous). Inhalation toxicity data are reported as LC50, the lethal concentration, in ppm/hr. For more information, review the article on toxicity on pages 198–199.