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colorimetric tubes 4 feet from the ground and 1 foot inside the
outer edge of the stack between the cartons but not inside the
cartons. One location is sufficient.
After the fumigator takes the concentration reading, you must record
the date, concentration reading, and time in Block 39 of PPQ Form
429. If you are not at the fumigation site, have the fumigator call and
give you the information. Then use the following table to determine
when to release the commodity.
TABLE 2-8-11Determine When to Release the Commodity
If the gas concentration level is: Then:
5 ppm or less RELEASE the commodity
6 ppm or more 1. CONTINUE aeration and take concentration readings until the
level is 5ppm or less, then
2. RELEASE the commodity
Chemical Treatments Fumigants • Methyl Bromide • Special Procedures for Container Fumigations Without a Tarpaulin
Aerating the Enclosure
2-8-28 Treatment Manual 10/2002-04
PPQ
10/2002-04 Treatment Manual 2-9-1
PPQ
Treatment Manual
2 Chemical Treatments 9
Fumigants • Sulfuryl Fluoride
Contents
Properties and Use page-2-9-1
Leak Detection page-2-9-2
Tarpaulin Fumigation page-2-9-2
Sealing page-2-9-3
Circulation page-2-9-3
Prevention of Condensation page-2-9-3
Gas Sampling Lines page-2-9-3
Gas Introduction page-2-9-4
Dosage Rate page-2-9-5
Measure Gas Concentrations page-2-9-5
Replacing Lost Gas page-2-9-5
Aeration page-2-9-5
Structural Fumigation page-2-9-6
Chamber Fumigation page-2-9-6
Shipboard Fumigation page-2-9-6
Safety and First Aid page-2-9-7
Protective Clothing page-2-9-7
If SF Is Inhaled page-2-9-7
If Liquid SF Is Spilled on the Skin page-2-9-7
If Liquid SF Is in the Eyes page-2-9-7
Consult the Vikane1 Gas Fumigant label and Structural Fumigation
Manual for more detailed instructions and additional supportive
information.
Properties and Use
Sulfuryl fluoride (SF) is a compressed-gas fumigant which is used
primarily against insects that attack wood. The following
characteristics make this fumigant especially desirable:
◆ High vapor pressure — 13,442 mm Hg @ 770 °F.
◆ Penetrates wood better than any other commercial fumigants,
including methyl bromide.
◆ Low solubility in water and low sorption by soil or commodity.
◆ Odorless, colorless, and nonflammable.
◆ Very low loss through plastic tarpaulins.
◆ Relatively non-reactive.
1 Trademark of Dow Agro Sciences
Chemical Treatments Fumigants • Sulfuryl Fluoride
Leak Detection
2-9-2 Treatment Manual 10/2002-04
PPQ
◆ 2.88 times heavier than air.
SF boils at minus 67 °F. SF is not registered for use on foodstuffs or on
living plant material.
SF is effective at very low dosages on Drywood termites where control
of the adult stage is the only concern (typically 0.5 – 1.0 lbs/1,0002).
Higher dosages are required for control of the egg stage of other
insects (typically 3 – 5 lbs/1,0002). Consult treatment schedules in
this manual for specific dosages.
Leak Detection
Interscan (Model GF 1900) or Miran gas analyzers (these units are
portable) may be used to detect SF in the range of 0 to 150 ppm
respectively. Consult the Vikane Structural Fumigation Manual for
further instructions. Colorimetric (“detector”) tubes are not available
for detecting SF gas leaks around tarpaulins, chambers, and
application equipment.
Tarpaulin Fumigation
Important
A halide leak detector, which depends upon the color of a flame to indicate the
presence and relative concentration of methyl bromide in the atmosphere,
cannot be used to detect SF.
Important
Refer to the section for tarpaulin fumigation with methyl bromide for additional
information on the following:
- selecting fumigation sites
- placing gas sampling lines
- sealing tarpaulins
- taking concentration readings
- securing fumigation areas
Important
Refer to the PPQ Treatment Manual section on Fumigants • Methyl Bromide •
Tarpaulin Fumigation (and aeration), the Vikane label, and Vikane Structural
Fumigation Manual for a detailed discussion of proper procedures.
Chemical Treatments Fumigants • Sulfuryl Fluoride
Tarpaulin Fumigation
10/2002-04 Treatment Manual 2-9-3
PPQ
Sealing
The commodity to be fumigated should be placed onto a relatively even
and non-porous surface, such as concrete, asphalt, or macadam.
Special attention should be given to the seal along the ground or floor.
The inspector should have tape, sand, or water snakes properly
　
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