Product: 655-466 Prentox庐 Dursban庐 2E
Material Safety Data Sheet
U.S. Department of Labor (OSHA 29 CFR 1910.1200)
Manufacturer's Name: Prentiss Incorporated
C. B. 2000
Floral Park, NY 11001
Telephone Number: (516) 326-1919
Section 1: Chemical Identification
Product: 655-466 Prentox(R) Dursban(R) 2E
EPA Signal Word: WARNING
Active Ingredient (%): Chlorpyrifos (24.6%) (CAS # 2921-88-2)
Chemical Name: O-(3,5,6-trichloro-2-pyridinyl) phosporothioate
Chemical Class: Organophosphorus Insecticide
Section 2: Composition/Information on Ingredients
OSHA ACGIH NTP/IARC/OSHA
Material: PEL TLV Other Carcinogen
0.2 mg/M3 (Skin) 0.2 mg/M3 (Skin)
Chlorpyrifos (24.6%) N/A N/A
Xylene Range Aromatic Solvent (CAS # 64742-95-6) (68.8%) See below
Contains the following SARA listed ingredients, by weight (typical):
1,2,4-Trimethyl Benzene (CAS # 95-63-6) 32.0 ACGIH TLV and OSHA PEL: 25 ppm
Mixed Xylenes (CAS # 1330-20-7) 3.0 ACIGH TLV and OSHA PEL: 100 ppm, TWA
Cumene (CAS # 98-82-8) 1.5 ACGIH TLV and OSHA PEL: 50 ppm, Skin
Ethyl Benzene (CAS # 100-41-4) 0.5 ACGIH TLV and OSHA PEL: 100 ppm, TWA
Emulsifier 1 (CAS # N/A) N/D 2.75
Emulsifier 2 (CAS # N/A) N/D 2.25
Section 3: Hazards Identification
EMERGENCY OVERVIEW:
Hazardous chemical. Pale yellow liquid. Mild mercaptan odor. May be fatal if swallowed or absorbed
through skin. Note to physician: Chlorpyrifos is a cholinesterase inhibitor. If symptoms of
cholinesterase inhibition are present, atropine sulfate by injection is antidotal. 2-PAM is also antidotal
and may be administered, but only in conjunction with atropine. Solvent may present aspiration hazard.
Gastric lavage may be indicated if product taken internally. Toxicity of other components: This product
contains a Xylene Range Aromatic Solvent composed of xylenes, ethylbenzenes and aromatic naphtha
containing trimethylbenzenes. Inhalation of solvent vapors at high concentrations can cause central
nervous system depression, respiratory tract irritation, asphyxiation, cardiac stress, and coma. Exposure
to extremely high levels of xylenes may cause kidney or liver damage.
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Product: 655-466 Prentox庐 Dursban庐 2E
Routes of Exposure:
Inhalation: Yes.
Skin: Yes.
Ingestion: Yes.
Signs and Symptoms of Overexposure: Symptoms include weakness, headache, tightness in chest,
blurred vision, non-reactive pinpoint pupils, salivation, sweating, nausea, vomiting, diarrhea and
abdominal cramps.
Section 4: First Aid Measures
If swallowed: Call a physician or Poison Control Center immediately. Contains petroleum distillates.
Do not induce vomiting. Get medical attention immediately.
If inhaled: Remove person to fresh air. Apply artificial respiration if symptoms indicate.
If on skin: Wash affected areas with soap and water.
If in eyes: Flush eyes with plenty of water. Get prompt medical attention.
Note to physician: Chlorpyrifos is a cholinesterase inhibitor. If symptoms of cholinesterase inhibition
are present, atropine sulfate by injection is antidotal. 2-PAM is also antidotal and may be administered,
but only in conjunction with atropine. Solvent may present aspiration hazard. Gastric lavage may be
indicated if product taken internally. Toxicity of other components: This product contains a Xylene
Range Aromatic Solvent composed of xylenes, ethylbenzenes and aromatic naphtha containing
trimethylbenzenes. Inhalation of solvent vapors at high concentrations can cause central nervous system
depression, respiratory tract irritation, asphyxiation, cardiac stress, and coma. Exposure to extremely
high levels of xylenes may cause kidney or liver damage.
Medical Conditions Generally Aggravated by Exposure: Pre existing conditions which lower
cholinesterase levels increase vulnerability to cholinesterase depression. These include: (for plasma)
genetic cholinesterase deficiency, advanced liver disease, chronic alcoholism, malnutrition,
dermatomyositis, existing toxicity from exposure to carbon disulfide, bezalkonium salts, organic mercury
compounds, ciguatoxins of solanines, and (for RBC) hemolytic anemias.
Section 5: Firefighting Measures
Fire and Explosion
108o F. (TCC)
Flash Point (Method Used):
Flammable Limits: Lower: 1.9 Upper: 12.6 (Solvent - approximate)
Extinguishing Media: CO2, Foam, Dry Chemical.
Special Fire Fighting Procedures: Fight fire from upwind position. Use self contained breathing
apparatus and equipment designed to prevent skin and eye contact. Cool exposed containers with water
spray. This product is toxic to birds, fish and other wildlife. Prevent spread of contaminated runoff.
Unusual Fire and Explosion Hazards: Rapid decomposition may occur above 320-392o F. (160-200o
C.) May give off hydrogen chloride, ethyl sulfide, diethyl sulfide and nitrogen oxides. Foam is preferred
method of fighting fires to help prevent spread of contaminated runoff.
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Product: 655-466 Prentox庐 Dursban庐 2E
Section 6: Accidental Release Measures
Wear protective equipment (see Section 8), as required, to prevent contact with product or its vapors.
Cover the spilled material with generous amounts of absorbent material, such as clay, diatomaceous
earth, sand or sawdust. Sweep the contaminated absorbent onto a shovel and put the sweepings into a
salvage drum. Dispose of wastes as below. Place any leaking container into another salvage drum.
Section 7: Handling and Storage
Precautions for handling and storage: Do not contaminate water, food or feed by storage or disposal.
Store in a dry place away from temperature extremes. Avoid inhalation of vapors. Avoid contact with
skin. Wear clean protective clothing. Causes substantial but temporary eye injury. Do not get in eyes.
Do not use or store near heat or open flame. If product is diluted with water, DO NOT use in conduits,
motor housings and electrical switch boxes. Care should be taken to avoid depositing the product onto
exposed surfaces or introducing the product into the air. Avoid contamination of food or food
processing surfaces. Do not treat pets with this product. See product label for other precautionary
statements for safe use.
Other precautions: Periodically inspect stored materials.
Section 8: Exposure Controls/Personal Protection
Respiratory protection: Handle concentrate in a well ventilated area. Wear a pesticide respirator jointly
approved by the Mining Enforcement and Safety Administration (formerly US Bureau of Mines) and the
National Institute for Occupational Safety and Health (NIOSH), under the provisions of 30 CFR Part II
when handling concentrate if TLV values might not be met.
Ventilation:
Local Exhaust: As required to meet TLV values.
Special: As required to meet TLV values.
Mechanical: As required to meet TLV values.
Other: As required to meet TLV values.
Protective Gloves: Chemical resistant, such as barrier laminate or Viton庐*.
Eye Protection: Face shield, goggles or safety glasses.
Other protective clothing or equipment: Wear protective clothing when handling concentrate.
Work/Hygienic practices: Handle concentrate in a ventilated area. May be fatal if inhaled or absorbed
through skin. Causes substantial but temporary eye damage. Do not get in eyes, on skin or on clothing.
Do not breathe fumes. Rapidly absorbed through skin. Wash hands, arms and face thoroughly with soap
and water before eating or smoking. Remove contaminated clothing and wash before reuse.
*Viton庐 - Registered trademark of DuPont Dow Elastomers.
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Product: 655-466 Prentox庐 Dursban庐 2E
Section 9: Physical/Chemical Properties
Boiling Point: N/D
Specific Gravity (H2O = 1): 0.9680
Vapor Pressure (mmHg): N/D
Melting Point: N/D
Vapor Density (Air = 1): N/D
Evaporation Rate (Butyl Acetate = 1): N/D
Solubility in Water: Emulsifies.
Appearance and Odor: Pale yellow liquid, mild mercaptan odor.
Section 10: Stability and Reactivity
Stability: Stable.
Conditions to avoid for stability: Chlorpyrifos undergoes exothermic
decomposition at about 130o C. (266o F.)
which can lead to higher temperatures and
violent decomposition if generated heat is
not removed. The solvent in this product
will burn.
Incompatibility: Alkalies.
Hazardous Decomposition or Byproducts: Hydrogen chloride, ethyl sulfide, diethyl
sulfide and nitrogen oxides.
Hazardous Polymerization: Will not occur.
Conditions to avoid for Hazardous Polymerization: None.
Section 11: Toxicological Information
Carcinogenicity: Chlorpyrifos did not cause cancer in long term animal studies.
Mutagenicity: Based on a majority of negative data and some equivocal or marginally positive results,
chlorpyrifos (the active ingredient in this product) is considered not to be mutagenic. Results of in vitro
(鈥渢est tube鈥?) and animal mutagenicity tests on the aromatic solvent have been negative.
Teratology (Birth Defects): Chlorpyrifos did not cause birth defects in laboratory animals.
Reproductive Effects: Chlorpyrifos did not interfere with fertility in reproduction studies in laboratory
animals. Some evidence of toxicity to the offspring occurred, but only at a dose high enough to produce
significant toxicity to the parent animals.
Section 12: Ecological Information
Environmental Fate:
Movement and Partitioning: (Based on information for chlorpyrifos and components of Aromatic
Solvent)
Bioconcentration potential is moderate (BCF between 100 and 3000 or Log Pow between 3 and 5.
Degradation and Persistence: (Based on information on chlorpyrifos)
The photolysis half-life in water is 3-4 weeks.
Tropospheric half-life is estimated to be 1.4 hours.
Degradation is expected in the soil environment within days to weeks.
Under aerobic soil conditions, the half-life is generally 30-60 days.
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Product: 655-466 Prentox庐 Dursban庐 2E
Ecotoxicology: (Based on information on chlorpyrifos)
Very highly toxic to aquatic organisms on an acute basis (LC50/EC50 <0.1 mg/L in most sensitive species.
Highly toxic to birds on a dietary basis (LC50 between 50 and 500 ppm).
Moderately toxic to birds on an acute basis (LD50 between 51 and 00 mg/Kg).
Section 13: Disposal Considerations
Waste disposal method: Pesticide wastes are toxic. Improper disposal of excess pesticide, spray
mixture, or rinsate is a violation of Federal Law. If these wastes cannot be disposed of by use according
to label instructions, contact your State Pesticide or Environmental Control Agency, or the Hazardous
Waste representative at the nearest EPA Regional Office for guidance. Container disposal: Triple rinse
(or equivalent). Then offer for recycling or reconditioning, or puncture and dispose of in a sanitary
landfill, or by other procedures approved by State and local authorities.
Section 14: Transport Information
DOT Classification: ORGANOPHOSPHORUS PESTICIDES, LIQUID, TOXIC, FLAMMABLE,
N.O.S. (CHLORPYRIFOS, PETROLEUM NAPHTHA), 6.1 (3), UN 3017, PG III, RQ
B/L Freight Classification: INSECTICIDES OTHER THAN POISON, NMFC ITEM 102120
International Transportation: Not available.
Section 15: Regulatory Information
SARA 313 Information:
This product contains a toxic chemical or chemicals (<>) subject to the reporting requirements of
Section 313 of Title III and of 40 CFR 372. Any copies or redistribution of this MSDS must
include this notice.
Xylene Range Aromatic Solvent (CAS # 64742-95-6) (68.8%)
Contains the following SARA listed ingredients, by weight (typical):
1,2,4-Trimethyl Benzene (CAS # 95-63-6) + 22%
Mixed Xylenes (CAS # 1330-20-7) + 2%
Cumene (CAS # 98-82-8) + 1%
Ethyl Benzene (CAS # 100-41-4) +0.34%
SARA Hazard Category:
Immediate health hazard
Delayed health hazard
Fire hazard
Toxic Substances Control Act (TSCA):
All ingredients are on the TSCA inventory or are not required to be listed on the TSCA inventory.
OSHA Hazard Communication Standard:
This product is a 鈥淗azardous Chemical鈥? as defined by the OSHA Hazard Communication Standard, 29
CFR 1910.1200.
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Product: 655-466 Prentox庐 Dursban庐 2E
NFPA Hazard Ratings:
Health: 2 0 Least
Flammability: 2 1 Slight
Reactivity: 1 2 Moderate
3 High
4 Severe
Comprehensive Environmental Response Compensation and Liability Act (CERCLA, or
Superfund):
This product contains the following substances listed as 鈥淗azardous Substances鈥? under CERCLA which
may require reporting of releases:
Chlorpyrifos (CAS # 2921-88-2) RQ = 1 (24.6%)
Cumene (CAS # 98-82-8) RQ = 5000 (1%)
Mixed Xylenes (CAS # 1330-20-7) RQ = 100 (2%)
Section 16: Other Information
Date Prepared: April 29, 2002
Supersedes: January 20, 1994
Reason: Complete revision.
____________________________________________________________________________________
The information and recommendations contained herein are based upon data believed to be
correct. However, no guarantee or warranty of any kind, expressed or implied, is made with
respect to the information contained herein.
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