Page 110 - Demo

Chemicals
Tetrahydrofuran
 HAZARD ALERT: Slightly toxic by ingestion and inhalation; flam- mable liquid; dangerous fire risk. Body tissue irritant. May possibly develop explosive peroxides. Do not distill to dryness. LD50 1650 mg/kg.
Storage: Organic #4 in a dedicated flammables cabinet. If one is not available, store in a Flinn Saf-Stor TM Can.
Disposal: #15. U-Listed (U213); purchase small amounts for effec- tive inventory control.
Shelf Life: Poor; see hazard alert above regarding peroxide development.
Soluble: Water and most organic solvents.
Color and Odor: Colorless liquid with an ether odor.
CAS No. 109-99-9
Tetrazolium Chloride
see Triphenyl Tetrazolium Chloride
ThermitTM
 HAZARD ALERT: When ignited, produces an extremely hot (>2000 °C) reaction mixture that will throw sparks 10–15 feet and is diffi- cult to stop. Wear face, hand, and eye protection and use a safety shield when performing demonstration.
Storage: Inorganic #4 inside a Flinn Saf-StorTM Can and then in a dedicated flammables cabinet.
Disposal: #26a
Shelf Life: Good if stored safely.
Color and Odor: White/gray/black, odorless solid.
CAS No. 69012-31-3
Technical Note: Thermit is a mixture of ferric oxide and very fine aluminum powder. The thermite reaction requires a temperature of almost 1200 °C for ignition, and is best performed using specially designed igniting sticks (see next listing, T0086).
Thermite Igniting Sticks
 HAZARD ALERT: Thermite igniting sticks are a fire hazard when exposed to a flame or temperatures above 500 °F. Contact us for a technical data sheet relating to their use.
Storage: Inorganic #1 in a dedicated flammables cabinet. Disposal: #26a
Shelf Life: Indefinite if kept dry.
Color and Odor: Silver gray metal on a copper stick, odorless. Safety Purchase Suggestion: These igniting sticks are the easiest and safest method for starting thermite reactions. Please consider using them instead of magnesium metal ribbon or other chemical igniters.
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THF
C4H8O F.W. 72.11
T0066
100 mL
$23.20
1 Molar
(as CH3CSNH2)
T0082
100 mL
$16.45
black
T0007
500 g
$14.25
biological stain
T0095
1g
$15.35
C12H10ClN3S F.W. 263.75
T0043
5g
55.75
Saturated
aqueous
T0044
100 mL
$21.75
T0086
pkg./10
$45.80
laboratory grade, crystal
CH3(C3H7)C6H3OH F.W. 150.11
M.P. 50 °C
T0030
100 g
$21.60
Thioacetamide
THIOACETAMIDE continued
 HAZARD ALERT: Possible carcinogen. Moderately toxic by inges- tion and inhalation. LD50 301 mg/kg.
Storage: Organic #2
Disposal: #13. U-Listed (U218); purchase small amounts for effec- tive inventory control.
Shelf Life: Indefinite
Soluble: Water, alcohol, and other organic solvents.
Color and Odor: White solid with buttered popcorn odor.
CAS No. 62-55-5
Technical Note: This reagent is used in qualitative analysis schemes to replace hydrogen sulfide gas. For an alternative method of gener- ating H2S, see our listings for “Aitch-Tu-Ess” (Flinn Catalog Nos. A0173 and A0232).
Thioacetamide Solution
HAZARD ALERT: Possible carcinogen. Moderately toxic by ingestion.
Color and Odor: Clear, colorless liuqid with a slight buttered popcorn odor.
For storage, disposal, etc., see Thioacetamide, T0009.
Thionin
Storage: Organic #9
Disposal: #26a
Shelf Life: Indefinite
Soluble: Hot water.
Color and Odor: Black solid with slight vinegar odor. CAS No. 581-64-6
C.I. #52000
Thionin Solution
Storage: Organic #9
Disposal: #26b
Shelf Life: Good, if stored away from light and heat. Color and Odor: Purple/black, odorless liquid. Technical Note: Approximately 0.5% thionin.
Thymol
 HAZARD ALERT: Skin and respiratory tract irritant; moderately toxic. LD50 980 mg/kg.
Storage: Organic #8
Disposal: #24a
Shelf Life: Indefinite
Soluble: Alcohol and acetic acid; slightly in water. Color and Odor: Colorless solid with a liniment odor. CAS No. 89-83-8
Technical Note: Melting point 50 °C.
laboratory grade, crystal
CH3CSNH2 F.W. 75.14
T0011
100 g
$60.15
Continued on next column.
Thermite Reactions
Thermite reactions may be difficult to start. It is common to use igniting sticks or magnesium metal ribbon as a fuse for starting the reaction. This demonstration should always be carried out behind a safety shield and in a container that can tolerate the heat, like a porcelain crucible. Enough heat is generated to melt steel! In fact, one of the commercial applications for thermit is metal welding. Practice this demonstration before ever showing it to your students.
Thymol Blue
Storage: Organic #9 Disposal: #26a Shelf Life: Indefinite
THYMOL BLUE continued on next page.
indicator, sodium salt
pH 1.2 red to 2.8 yellow and 8.0 yellow to 9.2 blue reagent grade, crystal
C27H29NaO5S F.W. 488.58
T0025
1g
$11.60