Page 78 - Demo

Chemicals
NITRIC ACID continued
 HAZARD ALERT: Corrosive; strong oxidant; toxic by inhalation and ingestion; avoid contact with acetic acid and readily oxidized substances. Concentrated nitric acid will attack and destroy metals and most plastics; never store concentrated nitric acid in a plastic bottle. TLV 5.2 mg/m3.
Storage: In a separate, isolated portion of your acid cabinet. Never store with acetic acid. If an acid cabinet is not available, store in a Flinn Saf-CubeTM.
Disposal: #24b
Shelf Life: When this substance is stored for a long period, it gradu- ally destroys the cap. Do not interchange another cap except one designated by its color code (red). Shelf life of nitric acid is good except for this bottle cap problem. Product may turn yellow due to the release of nitrogen dioxide on exposure to light. This yel- low color does not affect the product’s usefulness in the teaching laboratory.
Soluble: Miscible with water; considerable heat is released.
Color and Odor: Colorless liquid with a suffocating, unique odor. CAS No. 7697-37-2
Safety Purchase Suggestion: Buy and store only small package sizes and small quantities. For safety reasons, Flinn offers larger sizes of nitric acid and other hazardous substances in PVC-coated bottles. We have attempted to price the products in these safer containers as low as possible.
*Nitric acid is exactly as described under catalog number N0017 but in a PVC-coated bottle. In the event of breakage, acid and glass shards are safely retained in a PVC outer envelope. Plas-PakTM is a safer package choice.
1-800-452-1261
$250.45 356.60
76
flinnsci.com
Nitric Acid Solution
8 Molar 6 Molar 3 Molar 1 Molar 0.1 Molar
N0047 500 mL N0048 500 mL N0049 500 mL N0050 500 mL N0052 500 mL
$23.00 14.70 13.00
9.05 7.30
para-Nitrophenol
4-nitrophenol, indicator
pH 5.6 colorless to 7.6 yellow O2NC6H4OH
F.W. 139.11
N0073 25 g
$11.80
HAZARD ALERT: Corrosive; strong oxidizing solution; avoid contact with acetic acid and readily oxidized substances.
Storage: In a separate, isolated portion of your dedicated acid cabi- net. Never store near acetic acid.
Disposal: #24b
Shelf Life: Good
Color and Odor: Colorless liquid with slight nitric acid odor.
 HAZARD ALERT: Highly toxic by ingestion, inhalation, and skin absorption; body tissue irritant. LD50 202 mg/kg.
Storage: Organic #8
Disposal: #18b. U-Listed (U170); purchase small amounts for effec- tive inventory control.
Nitrogen Gas
Lecture bottle Refillable cylinder
LB1020 2 cu. ft. (56 liters)
(112 liters)
Storage: In an area dedicated to bottled gases and away from any
source of heat or flame.
Disposal: Completely empty lecture bottle, then follow #26a. Shelf Life: Indefinite if stored safely.
Soluble: Slightly in water and alcohol.
Color and Odor: Colorless, odorless.
CAS No. 7727-37-9
meta-Nitrophenol
3-nitrophenol, indicator
pH 6.8 colorless to 8.6 yellow O2NC6H4OH
F.W. 139.11
N0088 25 g
$49.55
 HAZARD ALERT: Moderately toxic by ingestion, inhalation, and skin absorption; body tissue irritant. LD50 328 mg/kg.
Storage: Organic #8
Disposal: #18b
Shelf Life: Good
Soluble: Hot water, alcohol, and ether.
Color and Odor: Yellowish, odorless solid.
CAS No. 554-84-7
Technical Note: Provides brighter colors than p-nitrophenol in vari- ous “rainbow” chemical demonstrations.
LB1075 4 cu. ft.
o-Nitrobenzaldehyde
laboratory grade, powder C7H5O3N
F.W. 151.12
N0078 10 g
$21.90
Shelf Life: Good
Soluble: Hot water, alcohol, and ether. Color and Odor: Yellowish, odorless solid. CAS No. 100-02-7
4-(p-Nitrophenylazo)resorcinol
magneson
qualitative reagent for the detection of magnesium
 HAZARD ALERT: Moderately toxic by ingestion. Body tissue irri- tant. LD50 600 mg/kg.
Storage: Organic #3
Disposal: #2
Shelf Life: Indefinite
Soluble: Slightly soluble in water; soluble in alcohol, ether, and acetone.
Color and Odor: Buff, odorless solid.
CAS No. 552-89-6
Technical Note: Use in the preparation of indigo dye.
C12H9N3O4 F.W. 259.22
N0031 10 g
$37.40
Storage: Organic #8
Disposal: #5
Shelf Life: Indefinite
Soluble: Insoluble in water; soluble in dilute sodium hydroxide solution.
Color and Odor: Red/brown, odorless solid.
CAS No. 74-39-5
Technical Note: Sometimes known as “magneson.” Brownish red powder for the detection of magnesium by turning bright blue in color. May also be used as an indicator for molybdenum where color is red violet.
Nucleic Acids
Hood Audit and Smoke Generator
The smoke generator (see page 129) should be placed at or near the center of the internal working space of the hood. With the hood operating and the smoke generator ignited, the smoke should move from immediately in front of the sash directly up and out of the hood chamber, allowing no spots of turbulence or dead space. The sash should be placed at the position where it provides the most efficient draft and then be labeled.
see Deoxyribonucleic Acid and Ribonucleic Acid