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Dimefox. Extremely Hazardous Substance. US EPA Chemical Profile.
October 31, 1985. Revised Nov. 30, 1987.


• See List of U.S. EPA of Extremely Hazardous Substances at http://www.epa.gov/swercepp/ehs/ehsalpha.html

EPA CHEMICAL PROFILE

Date: October 31, 1985

Revision: November 30, 1987

CHEMICAL IDENTITY -- DIMEFOX

CAS Registry Number: 115-26-4

Synonyms: Phosphorodiamidic Fluoride, Tetramethyl-; BFP; BFPO; bis(Dimethylamido)Phosphoryl Fluoride; N,N,N',N'- Tetramethylphosphorodiamidic Fluoride; Dimefox; Tetramethylphosphorodiamidic Fluoride; bis(Dimethylamido)Fluorophosphate; bis(Dimethylamino)Fluorophosphate; Bisdimethylaminofluorophosphine Oxide; CR 409; DIFO; DMF; Fluophosphoric acid Di(Dimethylamide); Hanane; Pestox 14; Pestox IV; Pestox XIV; Phosphine Oxide, bis(Dimethylamino)Fluoro-; Phosphorodiamidic Fluoride, Tetramethyl-; S-14; T-2002; Terra-sytam; Terrasytum; Tetrasytam; Tetramethyldiamidophosphoric Fluoride; TL 792; Wacker S 14/10

Chemical Formula: C4H12FN2OP

Molecular Weight: 154.13

SECTION I -- REGULATORY INFORMATION

CERCLA (SARA) 1986:

Toxicity Value Used for Listing Under Section 302: LD50 oral (rat) 1.0 mg/kg (*NIOSH/RTECS 1985)

TPQ: 500 (pounds)

RQ: 1 (pounds) (statutory, for notification under SARA Section 304(a)(2))

Section 313 Listed (Yes or No): No

SECTION II -- PHYSICAL/CHEMICAL CHARACTERISTICS

Physical State: Liquid

Boiling Point: 187F, 86C at 15 mmHg (*Merck 1976)

Specific Gravity (H2O=1): 1.115 at 20C/4C (*Merck 1976)

Vapor Pressure (mmHg): 0.36 at 25C (*Martin 1974)

Melting Point: Not Found Vapor Density (AIR=1): Not Found

Evaporation Rate (Butyl acetate=1): Not Found

Solubility in Water: Freely soluble (*Merck 1976)

Appearance and Odor: Colorless liquid (*Martin 1974) with a fishy odor (*Merck 1976)

SECTION III -- HEALTH HAZARD DATA

OSHA PEL: Not Found

ACGIH TLV: Not Found

IDLH: Not Found

Other Limits Recommended: Not Found

Routes of Entry: Inhalation: Yes (*Martin 1974) Skin: Yes (*Rumack 1975 to Present) Ingestion: Yes (*Rumack 1975 to Present)

Health Hazards (Acute, Delayed, and Chronic): This material is extremely toxic; the probable oral lethal dose (human) is 5-50 mg/kg, or 7 drops to 1 teaspoonful for a 150-lb. person. Death may occur from respiratory arrest (*Gosselin 1976). Hazards of vapor toxicity are high (*Martin 1974).

Medical Conditions Generally Aggravated by Exposure: Not Found

SECTION IV -- FIRE AND EXPLOSION HAZARD DATA

Flash Point (Method Used): Not Found

Flammable Limits:

LEL: Not Found

UEL: Not Found

Extinguishing Methods: (Non-Specific -- Insecticide, Liquid, Poisonous, n.o.s.) Extinguish with dry chemical, carbon dioxide, water spray, fog, or foam (DOT 1984, Guide 55).

Special Fire Fighting Procedures: (Non-Specific -- Insecticide, Liquid, Poisonous, n.o.s.) Stay upwind; keep out of low areas. Wear positive pressure breathing apparatus and special protective clothing. Ventilate closed spaces before entering them. Move container from fire area if you can do so without risk. Dike fire control water for later disposal; do not scatter the material (DOT 1984, Guide 55).

Unusual Fire and Explosion Hazards: Highly toxic fumes are given off upon decomposition with heat (*Sax 1975). (Non-Specific -- Insecticide, Liquid, Poisonous, n.o.s.) Container may explode in heat of fire (DOT 1984, Guide 55).

NFPA Flammability Rating: Not Found

SECTION V -- REACTIVITY DATA

Stability: Unstable:

Stable: Yes (*Sunshine 1969)

Conditions to Avoid: Decomposing heat (*Sax 1975); contact with chlorine (*Sunshine 1969).

Incompatibility (Materials to Avoid): Decomposes rapidly in the presence of chlorine. Oxidizes slowly in strong oxidizing agents (*Sunshine 1969).

Hazardous Decomposition or Byproducts: Highly toxic fumes are given off when material is heated to decomposition (*Sax 1975).

Hazardous Polymerization: May Occur: Not Found May Not Occur: Not Found

Conditions to Avoid: Not Found

SECTION VI -- USE INFORMATION

This material is used as an insecticide; it is neither produced nor used in the U.S. (*SRI). Not registered as a pesticide in the U.S. (USEPA/ Pesticide Index 1985).

SECTION VII -- PRECAUTIONS FOR SAFE HANDLING AND USE (Steps to be Taken in Case Material is Released or Spilled)

Avoid inhalation (see Section III above). (Non-Specific -- Insecticide, Liquid, Poisonous, n.o.s.) Do not touch spilled material; stop leak if you can do so without risk. Use water spray to reduce vapors. Small spills: absorb with sand or other noncombustible absorbent material and place into containers for later disposal. Large spills: dike far ahead of spill for later disposal (DOT 1984, Guide 55).

SECTION VIII -- PROTECTIVE EQUIPMENT FOR EMERGENCY SITUATIONS

For emergency situations, wear a positive pressure, pressure-demand, full facepiece self-contained breathing apparatus (SCBA) or pressure- demand supplied air respirator with escape SCBA and a fully-encapsulating, chemical resistant suit. See the introductory information section at the beginning of the profiles for additional information.

SUIT MATERIAL PERFORMANCE (Based on EPA/USCG "Guidelines", 1987) (Chemical Resistance/Amount of Data)

Butyl/Neoprene POOR/LIMITED**

Viton/Neoprene POOR/LIMITED*

**Based on qualitative performance information. **Based on a chemical analog.

SECTION IX -- EMERGENCY TREATMENT INFORMATION

Signs and Symptoms of Exposure:

Symptoms include headache, blurred vision, nausea, cramps, difficulty in breathing, slurring of speech, and excessive salivation (*Gosselin 1976).

Emergency and First Aid Procedures: (Non-Specific -- Insecticide, Liquid, Poisonous, n.o.s.) Move victim to fresh air; call emergency medical care. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. In case of contact with material, immediately flush skin or eyes with running water for at least 15 minutes. Speed in removing material from the skin is of extreme importance. Remove and isolate contaminated clothing and shoes at the site. Keep victim quiet and maintain normal body temperature. Effects may be delayed; keep victim under observation (DOT 1984, Guide 55).