Page 70 - Demo

Apparatus and Supplies
Cleaners, continued
Erada-Stain® Cream
Safely removes chemical and biological stains from hands, glassware, and lab equipment. Gentle but very effective; will remove silver nitrate stains. Biodegradable. 6 oz.
Clocks
Electric Wall Clock
Provided with sweep second hand. The clock is 12" in diameter and provides clear visibility in the laboratory from long distance. Bracket provided for wall mounting. Heavy plastic case. For 120 Volts, 60 Hz.
Clock Timers
See pages 221–222.
Colorimeters
See page 318.
Condensers
Liebig Condenser
Sealed-in condenser tube. Inlet and outlet on opposite sides of the jacket. Two jacket lengths are available. Inlet opening diameter is 21 mm. Accepts 3⁄8" i.d. tubing. Borosilicate glass.
Synthware® Distillation Condenser
Organic chemistry glassware. Commonly used as a heat exchanger; turns gases to liquids by a cooling system. The condensed liquid dispenses from the condenser’s tapered bottom into a receiving flask. The condenser is high-quality borosilicate glass.
Synthware® West Condenser
Organic chemistry glassware. Used to cool a solvent’s hot vapor so it may condense to a liquid. The narrow annular space allows for fast coolant speed. Simply connect a water hose to the bottom of the condenser. The water then exits through a hose connected to the top of the condenser. The condenser is high-quality borosilicate glass.
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Electric Wall Clock AP1191
Erada-Stain® Cream AP7330
Catalog No.
Description
Price/Each
AP7330
Erada-Stain® Cream
$27.10
Catalog No.
Description
Price/Each
AP1191
Electric Wall Clock
$42.70
Liebig Condenser GP1070, etc.
Synthware® Distillation Condenser GP9293
Catalog No.
Description
Size
Price/Each
GP1070
Liebig Condenser
200 mm
$ 96.90
GP1075
300 mm
109.55
Catalog No.
Description
Size
Price/Each
GP9293
Synthware® Distillation Condenser
14/20, 110 mm, 180 mm
$52.65
GP9294
24/40, 2000 mm, 330 mm
65.80
Catalog No.
Description
Size
Price/Each
GP9295
Synthware® West Condenser
14/20, 110 mm
$53.90
GP9296
24/40, 330 mm
71.80
Synthware® West Condenser GP9295
Clean and Wash Glassware
Wash lab glassware as quickly as possible after use. If the glassware cannot be washed immediately, then place it in the sink or a container to soak. Frequently, this single step will loosen material that later becomes very stubborn.
Actual washing should be done with detergents like those in this section. The water should be as hot as can be tolerated. Brushes should be used to help remove stubborn deposits. Avoid using any worn brushes with metal that can scratch the glass. That scratch will accelerate breakage and render the vessel unsafe. Glassware that is heated will break more easily from such a scratch than will glass at room temperature.
Do not allow even weak acids to come in contact with a piece of glassware before the detergent (or soap) is thoroughly removed. If this happens, a film of grease may form on your glassware.
Grease is best removed in a weak (10% or less) solution of sodium carbonate. Acetone may be used—but take all precautions.
Be sure all detergents, soaps and cleaners are rinsed from your glassware or the residue will interfere with later chemical reactions. Rinse in tap water and then dip-rinse in a container of distilled water.
Use draining racks to dry the glassware and reduce breakage.