SAFEAIRE
®
LABORATORY FUME HOODS
OPERATION, MAINTENANCE AND INSTALLATION INSTRUCTIONS
GENERAL INFORMATION
3
Dimensions are nominal and illustrations and specifications are based
on the latest product information available at the time of publication.
The right is reserved to make changes at any time without notice.
PERCHLORIC ACID HOODS
The properties of perchloric acid require that a specially
designed fume hood be set aside for exclusive use with this
material. The hood is equipped with a cold water spray device
for washdown of the interior surfaces. A trough is placed
across the back of the hood for collection and disposal of
washdown waters. Operating personnel should be well trained
in the proper handling techniques and be familiar with the
characteristics of this material.
Frequency of washdown, both hood interior and exterior
system, is determined by the usage and concentration of
reagents. This can range from a weekly procedure to one that
occurs after every use. Washdown should always be followed
by an inspection to verify that all areas are clean and that the
wash system is functioning properly.
Some of the hazards of perchloric acid which justify the use of
a special hood are:
1. Perchloric acid is a very strong acid, capable of producing
severe burns when in contact with skin, eyes or respiratory
tract.
2. As an aqueous solution, it can cause violent explosions if
improperly handled.
3. It reacts with other substances to form unstable materials
which are susceptible to exploding either by impact, friction,
or spontaneous combustion.
Persons using perchloric acid should be thoroughly familiar with
its hazards. Many reported laboratory accidents have involved
less than one gram of reactant. Listed below are some common
safety practices that should be followed:
• Spilled perchloric acid should be thoroughly washed away
with large amounts of water.
• The use of organic chemicals or materials in the hood should
be avoided.
• Goggles or other effective eye protection should be used
whenever possible, as well as utilization of the fume hood
sash for additional safety.
• Gas flames or oil baths should not be used within the hood.
• Organic chemicals should not be kept in storage areas set
aside for perchloric acid storage.
• A schedule should be made for regular washdown and
inspection of hood interior, ductwork and blower to guard
against a build-up of dangerous perchloric materials.
• Only a fluorocarbon grease should be used as a blower
lubricant, since any other type is to be considered potentially
hazardous.
• Washdown procedure should be performed after completion
of usage with all apparatus removed from hood.
HOOD IDENTIFICATION
Fisher Hamilton Inc Two Rivers, WI 54241
Item/Room No. . . .
Item:
158C
Room:
207
Job/Unit No. . . . .
TX 394381 012 H012M Unit: 0005093
Product No. . . . . .
FH3943810244 Entity:
Description . . . . .
Desc: X54L836PD – DWG. HD01
Project Name . . .
Project Name: RICE UNIVERSITY – OLD CHEMISTRY
Shop Order No. . .
Shop Order #: 161914 P.O. No.: 22492/26108
Clr:
G1
G1
UNCRATED
Bar Code No. . . . .
018021957
Louver
Panel
Side
Panel
2-Part Label
(Located
on backside
of collar and
inside of
louver panel)
Gasketed
Access
Panel
Liner
Sash
Baffles
TX
394381
FH3943810244
X54L836PD
–
D
WG.
HD01
Placed on backside of collar
Placed on inside
of louver panel
Summary of Contents for SAFEAIRE series
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