COREXIT™ EC9500A

TECHNICAL PRODUCT BULLETIN #D-4
USEPA, OEM REGULATIONS IMPLEMENTATION DIVISION
ORIGINAL LISTING DATE: APRIL 13, 1994
REVISED LISTING DATE: DECEMBER 18, 1995
"COREXIT™ EC9500A"

I. NAME, BRAND, OR TRADEMARK
COREXIT™ EC9500A Type of Product: Dispersant (formerly COREXIT 9500)

II. NAME, ADDRESS, AND TELEPHONE NUMBER OF MANUFACTURER/CONTACT
Corexit Environmental Solutions LLC 11177 South Stadium Drive Sugar Land, TX 77478 Product Management: Phone: (281) 632-8827 E-mail: corexitinfo@corexit.com (Mr. Huw Jones)

III. NAME, ADDRESS, AND TELEPHONE NUMBER OF PRIMARY DISTRIBUTORS
Corexit Environmental Solutions LLC 11177 South Stadium Drive Sugar Land, TX 77478 Product Management: Phone: (281) 632-8827 E-mail: corexitinfo@corexit.com (Mr. Huw Jones)

IV. SPECIAL HANDLING AND WORKER PRECAUTIONS FOR STORAGE AND FIELD APPLICATION
1. Flammability: IMO: Non-flammable; DOT: Non-hazardous. 2. Ventilation: 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: 170ºF 4.b. Minimum storage temperature: -30ºF 4.c. Optimum storage temperature range: 40ºF to 100ºF 4.d. Temperatures of phase separations and chemical changes: None

IV. SPECIAL HANDLING AND WORKER PRECAUTIONS FOR STORAGE AND FIELD APPLICATION

1. Flammability:
IMO: Non-flammable; DOT: Non-hazardous.
2. Ventilation:
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: 170ºF
4.b. Minimum storage temperature: -30ºF
4.c. Optimum storage temperature range: 40ºF to 100ºF
4.d. Temperatures of phase separations and chemical changes: None

V. SHELF LIFE
The shelf life of unopened drums of COREXIT™ EC9500A 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™ EC9500A contains the same surfactants present in COREXIT™ EC9527A and a new improved oleophilic solvent delivery system. 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™ EC9500A 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™ EC9500A may also 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™ EC9500A 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 control may also be useful for applying COREXIT™ EC9500A. 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. Application at sub-freezing temperatures may require larger nozzle, supply lines and orifices due to higher product viscosity. 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™ EC9500A, even at reduced treat rates, can also counter the "mousse" forming tendencies of the spilled oil. COREXIT™ EC9500A is useful on oil spills in salt water.

VI. RECOMMENDED APPLICATION PROCEDURE

1. Application Method:
COREXIT™ EC9500A contains the same surfactants present in COREXIT™ EC9527A and a new improved oleophilic solvent delivery system.
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™ EC9500A 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™ EC9500A may also 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™ EC9500A 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 control may also be useful for applying COREXIT™ EC9500A. 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. Application at sub-freezing temperatures may require larger nozzle, supply lines and orifices due to higher product viscosity.
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™ EC9500A, even at reduced treat rates, can also counter the "mousse" forming tendencies of the spilled oil. COREXIT™ EC9500A is useful on oil spills in salt water.

VII. TOXICITY AND EFFECTIVENESS

a. Toxicity

Material Tested	Species	LC50 (ppm)
COREXIT™ EC9500A	Menidia beryllina Mysidopsis bahia	25.20 96-hr 32.23 48-hr
No. 2 Fuel Oil	Menidia beryllina Mysidopsis bahia	10.72 96-hr 16.12 48-hr
COREXIT™ EC9500A & No. 2 Fuel Oil (1:10)	Menidia beryllina Mysidopsis bahia	2.61 96-hr 3.40 48-hr
Reference Toxicant (SDS)	Menidia beryllina Mysidopsis bahia	7.07 96-hr 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.

b. Effectiveness:
SWIRLING FLASK DISPERSANT EFFECTIVENESS TEST WITH SOUTH LOUISIANA (S/L) AND PRUDHOE BAY (P/B) CRUDE OILS

Oil	Effectiveness (%)
Prudhoe Bay Crude	45.3%
South Louisiana Crude	54.7%
Average of Prudhoe Bay and South Louisiana Crudes	50.0 %

VIII. PHYSICAL PROPERTIES
1. Flash Point: 181.4ºF 2. Pour Point: Less than -71ºF 3. Viscosity: 22.5 cst at 104ºF 4. Specific Gravity: 0.949 at 60ºF 5. pH: 6.2 6. Chemical Name and Percentage by Weight of the Total Formulation: CONFIDENTIAL 7. Surface Active Agents: CONFIDENTIAL 8. Solvents: CONFIDENTIAL 9. Additives: None 10. Solubility: Miscible

IX. ANALYSIS FOR HEAVY METALS, CYANIDE, AND CHLORINATED HYDROCARBONS

Compound	Concentration (ppm)
Arsenic	0.16
Cadmium	N/D
Chromium	0.03
Copper	0.10
Lead	N/D
Mercury	N/D
Nickel	N/D
Zinc	N/D
Cyanide	N/D
Chlorinated Hydrocarbons	N/D

N/D = Not detected

COREXIT™ EC9500A

Emergency Response