Page 56 - Demo

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Chemicals
1-800-452-1261
Graphite Powder
Storage: Inorganic #4; store in a Flinn Saf-Stor TM Can. Disposal: #26a
Shelf Life: Indefinite
Color and Odor: Gray/black, odorless solid.
CAS No. 7782-42-5
Guaiacol Solution, 0.2%
0.2% in isopropyl alcohol reducing agent for peroxidase enzyme activity studies forms orange product with hydrogen peroxide
and peroxidase G0054 100 mL $8.75
HAZARD ALERT: Flammable liquid, irritating to body tissues. Slightly toxic by ingestion and inhalation.
Storage: Organic #2 in a dedicated flammables cabinet. If a flam- mables cabinet is not available, store in a Flinn Saf-StorTM Can. Disposal: #18a
Shelf Life: Good, if stored safely. Protect from heat and light. Color and Odor: Colorless liquid, rubbing alcohol odor.
Heptanal
n-heptaldehyde, aldehyde C7 laboratory grade CH3(CH2)5CHO
F.W. 114.19
flinnsci.com
90–97%
G0010
$19.05
500 g
 HAZARD ALERT: A fire risk as fine powder. TLV 2.5 mg/m3.
H0059
25 mL $14.60
Guar Gum
laboratory grade, powder
G0039 100 g G0040 500 g
$15.70 27.50
n-Heptane
laboratory grade
C7H16
F.W. 100.21
H0051 100 mL H0001 500 mL
$12.10 24.10
Storage: Organic #2
Disposal: #26a
Shelf Life: Indefinite
Soluble: Water
Color and Odor: Buff solid with freshly cut grass odor. CAS No. 39421-75-5
 HAZARD ALERT: Dangerous fire risk; flammable liquid; slightly toxic by inhalation. TLV 1640 mg/m3.
Storage: Organic #3 in a dedicated flammables cabinet. If a flam- mables cabinet is not available, then store in a Flinn Saf-Stor TM Can. Disposal: #18b
Technical Note: This material is most frequently used for preparing slime.
Shelf Life: Good if stored safely.
Soluble: Alcohol, ether, and chloroform; not water. Color and Odor: Colorless liquid with paint thinner odor. CAS No. 142-82-5
Gum Arabic
see Acacia
Gypsum
see Calcium Sulfate
Helium Gas
Lecture bottle
Refillable cylinder
H
Hexamethylenediamine
1,6-hexanediamine 80–95%, aqueous solution H2N(CH2)6NH2
F.W. 116.20
H0030 100 g H0020 250 g
$20.25 42.95
 HAZARD ALERT: Flammable liquid and vapor; moderate fire risk. May cause serious eye damage; irritating to skin and respiratory tract. Slightly toxic by ingestion. LD50 3200 mg/kg.
Storage: Organic #3 in a dedicated flammables cabinet. If one is not available, store in a Flinn Saf-Stor TM Can.
Disposal: #26c
Shelf Life: Fair; undergoes autoxidation in air.
Soluble: Alcohol; slightly soluble in water.
Color and Odor: Colorless to light yellow liquid; unpleasant, rancid fat odor.
CAS No. 111-71-7
Technical Note: Easily oxidized by oxygen in air and other oxidiz- ing agents.
LB1010 2 cu. ft. (56 liters)
LB1065 3.6 cu. ft.
$407.00
$385.55
 HAZARD ALERT: Moderately toxic by ingestion; strong tissue irritant. LD50 750 mg/kg.
Storage: Organic #2
Disposal: #26b
Shelf Life: Indefinite
Soluble: Water; slightly in alcohol.
Color and Odor: Colorless solid with ammonia odor.
CAS No. 124-09-4
Technical Note: Below room temperature this substance is a crys- talline solid. Melting point is approximately 40 °C. Warm reagent bottle in water bath until sufficient solid has melted and the liquid can be decanted.
Hexamethylenediamine/Sodium Hydroxide Solution
(100 liters)
 HAZARD ALERT: Please do not allow students to inhale helium. Government health agencies and industrial safety representatives have taken strong stands against the practice of breathing helium to demonstrate the change in pitch that occurs when breathing a lighter-than-air gas. Breathing helium removes oxygen from the bloodstream, so it’s not the same and actually worse than just “hold-
ing your breath.”
Storage: In an area dedicated to bottled gases.
Disposal: Completely empty lecture bottle, then follow #26a. Shelf Life: Indefinite
Soluble: Slightly in water; insoluble in alcohol.
Color and Odor: Colorless, odorless.
CAS No. 7440-59-7
Note: See flinnsci.com for Helium Balloon Tank, 14.9 cu. ft. (Catalog No. AP9685)
for nylon demonstration
contains: hexamethylenediamine, 6 grams;
sodium hydroxide, 2 grams; distilled water, 100 mL; red vegetable dye added to to give slight pink color.
H0032 100 mL
$6.75
 HAZARD ALERT: Slightly toxic by ingestion; corrosive to body tissue.
Storage: Organic #2
Disposal: #10
Shelf Life: Good
Color and Odor: Pink, odorless liquid.
Technical Note: You will need a second solution to prepare nylon. See sebacoyl chloride/hexane solution or adipoyl chloride/hexane solution for preparation of nylon.
Safety Posters
Is safety important to you? Are your laboratory safety rules important enough to post in the science laboratory? Safety posters are a super safety aid. They are a constant reminder to students that safety is important. Make posters yourself or see pages 147–148. If it’s important—post it!