Naled

  • 1,2-Dibromo-2,2-dichloroethyl dimethyl phosphate
  • Dimethyl-1,2-dibromo-2,2-dichlorethyl phosphate
Formula C4H7Br2Cl2O4P
Structure
Description Colorless to white solid or straw-colored liquid with a slightly pungent odor.
Uses Fungicide, bactericide.

Registry Numbers and Inventories.
CAS 300-76-5
EC (EINECS/ELINCS) 206-098-3
EC Index Number 015-055-00-6
EC Class Harmful; Irritant
RTECS TB9450000
RTECS class Agricultural Chemical and Pesticide; Mutagen; Primary Irritant
UN (DOT) 3018
Merck 12,6445
Beilstein/Gmelin 2049930
EPA OPP 34401
Swiss Giftliste 1 G-2555
Austrailia AICS Listed
New Zealand Listed
Korea ECL Listed

Properties.
Formula C4H7Br2Cl2O4P
Formula mass 380.78
Melting point, °C 27.0
Boiling point, °C 273
Vapor pressure, mmHg 0.009 (25 C)
Vapor density (air=1) 13.1
Density 1.96 g/cm3 (20 C)
Solubility in water Insoluble
Partition coefficient, pKow 1.38
Heat of vaporization 49.2 kJ/mol

Hazards and Protection.
Storage Tightly closed containers. Keep away from heat, water, food, foodstuffs, and sunlight, which may cause slow decomposition.
Handling All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection Wear appropriate protective gloves, clothing and goggles.
Respirators Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash or cement powder. Water spill: If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Stability Container may rupture under fire conditions.
Incompatibilities Incompatible with the following: Strong oxidizers, acids, sunlight, water Corrosive to metals.
Decomposition When heated to decomp naled evolves very toxic fumes of hydrogen bromide, hydrogen chloride and phosphorus oxides hazardous decomposition products. May include: hydrogen bromide, hydrogen chloride, phosphoric acid and carbon monoxide.

Fire.
Flash Point,°C 119
Fire fighting Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)
Fire potential Combustible.
Hazards Containers may explode when heated.
Combustion products Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s) TLV: ppm; 3 mg/m3 A4 (skin) (ACGIH 1996). OSHA PEL: TWA 3 mg/m3 NIOSH REL: TWA 3 mg/m3 skin NIOSH IDLH: 200 mg/m3
Poison_Class 3
Exposure effects Reduced body temperature or elevated body temperature may occur. Low heart rate and abnormally low blood pressure may develop after moderate to severe poisoning. Rapid heart rate, elevated blood pressure, and changes in respiratory rate may also occur. Early giddiness, anxiety headache, and restlessness followed by ataxia, drowsiness, and confusion are common with moderate to severe exposures. Sporadic reports of human birth defects related to organophosphates have not been fully verified.
   Ingestion Nausea, vomiting, abdominal cramps, and diarrhea are common muscarinic effects. Both painless and frank clinical pancreatitis have been reported.
   Inhalation Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin Profuse sweating is common. Pallor may be noted. Dermal sensitization has been reported.
   Eyes Constriction of the pupil, tearing, and blurred vision are common. Prolonged dialation of the pupils may occur. Salivation commonly occurs.

First aid
 
   Ingestion Seek medical assistance.
   Inhalation Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes Immediately flush with running water for at least 20 minutes.

Transport.
UN number 3018
Response guide 152
Hazard class 6.1
Packing Group I; II; III  
USCG CHRIS Code NLD  
Std. Transport # 4961659