58 1-800-452-1261
D
Decanedioyl Chloride
see Sebacoyl Chloride
Dehydrating Agents
see Calcium Chloride, Drierite®, etc.
Deionized Water
see Water, Deionized
Desiccants
see Calcium Chloride, Drierite®, etc.
Detergents
see Cleaners
Dextrose
glucose, anhydrous
reagent, granular
C6H12O6
F.W. 180.16
D0002 500 g $ 9.89
D0015 2 kg 27.90
Storage: Organic #2
Disposal: #26a
Shelf Life: Good if kept dry; store in a Flinn Chem-Saf ™ Bag.
Soluble: Water; slightly in alcohol.
Color and Odor: White, odorless solid.
CAS No. 492-62-6
Dextrose
glucose, monohydrate
laboratory grade, powder
C6H12O6•H2O
F.W. 198.18 D0005 500 g $9.89
Storage: Organic #2
Disposal: #26a
Shelf Life: Good if kept dry; store in a Flinn Chem-Saf ™ Bag.
Soluble: Water; slightly in alcohol.
Color and Odor: White, odorless solid.
CAS No. 5996-10-1
Dextrose Agar
bacteriological culture media
D0049 100 g $48.50
Storage: With culture media.
Disposal: #26a
Shelf Life: Good if kept dry; store in a Flinn Chem-Saf ™ Bag.
Soluble: Water
Color and Odor: Buff solid with dry dog food odor.
Dextrose Solutions
see Glucose Solutions
2,6-Di-t-Butyl-4-Methylphenol
BHT, butylated hydroxytoluene
laboratory grade, crystals
((CH3)3C)2CH3C6H2OH
F.W. 220.36
D0058 500 g $30.35
HAZARD ALERT: Moderately toxic by ingestion and inhalation. Body
tissue irritant. LD50 890 mg/kg.
Storage: Organic #8
Disposal: #24a
Shelf Life: Good; reacts with oxygen; limit exposure to air.
Soluble: Alcohol, xylenes, and acetone.
Color and Odor: White, odorless solid.
CAS No. 128-37-0
Technical Note: A safer alternative for melting point determination: melting
point is 69–71 °C.
para-Dibromobenzene
1,4-Dibromobenzene
reagent
C6H4Br2
F.W. 235.90
D0014 500 g $106.00
HAZARD ALERT: Causes skin irritation. Causes serious eye irritation. May
cause respiratory irritation.
Storage: Organic #4
Disposal: #4b.
Shelf Life: Good
Soluble: Soluble in ethanol and benzene; very soluble in diethyl ether,
acetone, and carbon disulfide.
Color and Odor: Light yellow plates, odorless solid.
CAS No. 106-37-6
para-Dichlorobenzene
1,4-dichlorobenzene
laboratory grade, crystal
C6H4Cl2
F.W. 147.01
M.P. 53 °C
D0007 500 g $13.90
HAZARD ALERT: Possible carcinogen. Severe irritant to eyes, skin, and
respiratory tract. Moderately toxic by ingestion. LD50 500 mg/kg. The threshold
limit value (TLV) for this substance is 60 mg/m3 in air. Provide a high degree
of ventilation.
Storage: Organic #4
Disposal: #4b. U-Listed (U072); purchase small amounts for effective inventory
control.
Shelf Life: Fair to poor; substance volatile; store in a Flinn Chem-Saf ™ Bag.
Soluble: Insoluble in water; soluble in many organic solvents.
Color and Odor: White solid with moth ball odor.
CAS No. 106-46-7
Safety Purchase Suggestion: Cetyl alcohol, stearic acid and t-octyl
phenol are safer alternatives for melting point determinations. A safer alternative
for enthalpy of fusion experiments might be acetamide.
DNA Samples for Electrophoresis
See page 530 for predigested, ready-to-run DNA samples for electrophoresis.
2,6-Dichloroindophenol, Sodium Salt
2,6-dichlorophenol indophenol
DPIP, DCIP or DCPIP
reagent, powder
NaOC6H4N=C6H2(Cl2):O
F.W. 290.09
D0009 1 g $11.20
D0026 5 g 33.50
Storage: Organic #8
Disposal: #5
Shelf Life: Poor, substance is hygroscopic; may contain up to 2 moles water
of hydration.
Soluble: Water and alcohol.
Color and Odor: Dark green solid with throat lozenge odor.
CAS No. 620-45-1
Technical Note: Use a 0.025% solution for Vitamin C determination.
Solution is blue in base, changes to red in acid. Solutions of this indicator have
a poor shelf life; make fresh solution for best results.
Heavy Metals
Heavy metals, including cadmium and cadmium compounds, are most
dangerous if inhaled as a fume or fine dust. Water soluble compounds of
heavy metals are also toxic, but inhalation and ingestion are extremely
unlikely. If the cadmium you intend to use will not generate a dust that can
be inhaled, prudent practice suggests that it is not necessary to ban the
material. Many heavy metals serve useful purposes in everyday life. Know
the substance, how it can hurt you and how it can be properly disposed of.
Don’t be chemophobic!
2,6-Di-t-Butyl-4-Methylphenol continued
Continued on next column.
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