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COREXIT 9527
TECHNICAL PRODUCT BULLETIN #D-1
USEPA, OIL PROGRAM CENTER
ORIGINAL LISTING DATE: MARCH 10, 1978
REVISED LISTING DATE: DECEMBER 18, 1995
"COREXIT 9527"
I.NAME, BRAND, OR TRADEMARK
COREXIT 9527
Type of Product: Dispersant (Concentrate)
II.NAME, ADDRESS AND TELEPHONE NUMBER OF MANUFACTURER/CONTACT
Nalco/Exxon Energy Chemicals, LP
P.O. Box 87
Sugarland, TX 77487-0087
Customer Services:
Phone: (281) 263-7205
(800) 333-3714
Fax: (281) 263-7149
24-hour Emergency Number: (281) 263-7200
Product Management:
Phone: (281) 263-7736
(281) 263-7955
Mobile: (713) 854-1658
(Mr. Paul Hey)
III.NAME, ADDRESS, AND TELEPHONE NUMBER OF PRIMARY DISTRIBUTORS
ABASCO
11355 Highway 225
La Porte, TX 77571
Phone: (281) 470-0440
24-hour Emergency Number: (800) 421-4911 |
Nalco/Exxon Energy
Chemicals, L.P.
P.O. Box 87
Sugar Land, TX 77487-0087
Phone: (800) 333-3714
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Nalco/Exxon Energy
Chemicals L.P.
P.O. Box 220
Long Beach, CA 90801
Phone: (310) 639-1553 |
Nalco/Exxon Energy
Chemical, L.P.
701 E. Tudor St, # 290
Anchorage, AK 99503
Phone: (907) 563-9866 |
IV.SPECIAL HANDLING AND WORKER PRECAUTIONS FOR STORAGE AND FIELD
APPLICATION
1.Flammability:
COREXIT 9527 is not classified as flammable by either DOT or IMO
regulations.
2.Ventilation:
Avoid prolonged breathing of vapors. Use with ventilation equal to
unobstructed outdoors in moderate breeze.
3.Skin and eye contact; protective clothing; treatment in case of
contact:
Avoid eye contact. In case of eye contact, immediately flush eyes with
large amounts of water for at least 15 minutes. Get prompt medical
attention. Avoid contact with skin and clothing. In case of skin
contact, immediately flush with large amounts of water, and soap if
available. Remove contaminated clothing, including shoes, after flushing
has begun. If irritation persists, seek medical attention. For open
systems where contact is likely, wear long sleeve shirt, chemical
resistant gloves, and chemical protective goggles.
4.a.Maximum storage temperature: 170 F
4.b.Minimum storage temperature: -30 F
4.c.Optimum storage temperature range: 40 F to 100 F
4.d.Temperatures of phase separations and chemical changes:
COREXIT 9527 is not adversely affected by changes in storage temperature
unless evaporation is allowed to occur.
V.SHELF LIFE
The shelf life of unopened drums of COREXIT 9527 is unlimited.
Containers should always be capped when not in use to prevent
contamination and evaporation of solvents.
VI.RECOMMENDED APPLICATION PROCEDURE
1.Application Method:
COREXIT 9527 is most effectively applied by aircraft, however,
application with boat spray booms, boat fire monitors, and by hand held
sprayers and back packs has been successfully done on a number of spills
and trials. Aerial Spraying - Aircraft provide the most rapid method of
applying dispersants to an oil spill and a variety of aircraft can be
used for spraying. For aerial spraying, COREXIT 9527 is applied
undiluted. Typical application altitudes of 30 to 50 feet have been
used, although higher altitudes may be effective under certain
conditions. Actual effective altitudes will depend on the application
equipment, weather and aircraft. Careful selection of spray nozzles is
critical to achieve desired dose levels, since droplet size must be
controlled. Many nozzles used for agricultural spraying are of low
capacity and produce too fine a spray. A quarter-inch open pipe may be
all that is necessary if the aircraft travels at 120 mph (104 knots) or
more, since the air shear at these speeds will be sufficient to break
the dispersant into the proper sized droplets. Boat Spraying - COREXIT
9527 may be applied by workboats equipped with spray booms mounted ahead
of the bow wake or as far forward as possible. The preferred and most
effective method of application from a workboat is to use a low-volume,
low-pressure pump so the chemical can be applied undiluted. Spray
equipment designed to provide a five to ten percent diluted dispersant
solution to the spray booms can also be used. COREXIT 9527 should be
applied as droplets, not fogged or atomized. Natural wave or boat wake
action usually provides adequate mixing energy to disperse the oil.
Recent tests have indicated that a fire monitor modified with a screen
cap for droplet size may also be useful for applying COREXIT 9527. Due
to the increased volume output and the greater reach of the fire
monitor, significantly more area can be covered in a shorter period of
time.
System Calibration - Spray systems should be calibrated at temperatures
anticipated to insure successful application and dosage control. Refer
to Nalco/Exxon Energy Chemicals TECHNIFAX® TX-116 charts for
calibrating application systems.
2.Concentration/Application Rate:
A treatment rate of about 2 to 10 U.S. gallons per acre, or a dispersant
to oil ratio of 1:50 to 1: 10 is recommended. This rate varies depending
on the type of oil, degree of weathering, temperature, and thickness of
the slick.
3.Conditions for Use:
As with all dispersants, timely application ensures the highest degree
of success. Early treatment with Corexit 9527, even at reduced treat
rates, can reduce the "mousse" forming tendencies of the
spilled oil. COREXIT 9527 is useful on oil spills in salt water.
VII.TOXICITY AND EFFECTIVENESS
1.Toxicity:
| Material Tested |
SPECIES |
LC50 (ppm) |
| COREXIT 9527 |
Menidia beryllina |
14.57 96-hr |
| Mysidopsis bahia |
24.14 48-hr |
| No. 2 Fuel Oil |
Menidia beryllina |
10.72 96-hr |
| Mysidopsis bahia |
16.12 48-hr |
| COREXIT 9527 & No. 2 Fuel Oil (1:10) |
Menidia beryllina |
4.49 96-hr |
| Mysidopsis bahia |
6.60 48-hr |
| Reference Toxicant (DSS) |
Menidia beryllina |
7.07 96-hr |
| Mysidopsis bahia |
9.82 48-hr |
NOTE: This toxicity data was derived using the concentrated product. See
Section VI of this bulletin for information regarding the manufacturer's
recommendations for concentrations and application rates for field use.
2.Effectiveness
SWIRLING FLASK DISPERSANT EFFECTIVENESS TEST WITH SOUTH
LOUISIANA (S/L) AND PRUDHOE BAY (P/B) CRUDE OIL
VENDOR LAB REPORT
| Oil |
Effectiveness, % |
| Prudhoe Bay Crude |
37.4% |
| South Louisiana Crude |
63.4% |
| Average of Prudhoe Bay and South Louisiana Crudes |
50.4 % |
U.S. EPA OFFICE OF RESEARCH AND DEVELOPMENT REPORT
| Oil |
Effectiveness, % |
| Prudhoe Bay Crude |
51% |
| South Louisiana Crude |
31% |
| Average of Prudhoe Bay and South Louisiana Crudes |
41% |
EPA is reporting these numbers as an additional reference for
On-Scene Coordinators (OSCs). EPA recognizes that large discrepancies
may exist between lab results. EPA is currently working on revising the
Swirling Flask Dispersant Effectiveness Test to facilitate more
consistent results between labs and operators.
VIII.MICROBIOLOGICAL ANALYSIS
Not Applicable
IX.PHYSICAL PROPERTIES
1.Flash Point: 162 F
2.Pour Point: Less than -45 F
3.Viscosity:
60 cst at 60 F
22 cst at 100 F
9 cst at 150 F
4.Specific Gravity:
0.995 at 60 F
0.975 at 100 F
5.pH: 8.2 (10% in deionized water)
6.Surface Active Agents: CONFIDENTIAL
7.Solvents: Water, Ethylene glycol monobutyl ether
8.Additives: Borate ester
9.Solubility: Not Applicable
X.ANALYSIS FOR HEAVY METALS, CYANIDE, AND CHLORINATED HYDROCARBONS
| COMPOUND |
CONCENTRATION (ppm) |
| Aresenic |
< 0.005 |
| Cadmium |
< 0.01 |
| Chromium |
< 1.0 |
| Copper |
< 0.2 |
| Lead |
< 0.1 |
| Mercury |
< 0.003 |
| Nickel |
< 0.1 |
| Zinc |
0.1 |
| Cyanide |
< 0.01 |
| Chlorinated Hydrocarbons |
< 0.01 |
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