Pyriminil

  • DLP-787
  • N-(4-Nitrophenyl)-N'-(3-pyridinylmethyl)urea
  • N-3-Pyridylmethyl-N'-p-nitrophenylurea
  • Pyrinuron
  • Pyriminyl
  • Vacor
Formula
C13H12N4O3
Structure
Description
Yellow, resembling corn meal.
Uses
Rodenticide used to control norway rats, roof rats, & house mice, it was especially effective against rodents resistant to anticoagulant poisons.

Registry Numbers and Inventories.
CAS
53558-25-1
EC (EINECS/ELINCS)
258-626-7
RTECS
YT9690000
RTECS class
Agricultural Chemical and Pesticide; Human Data
Merck
12,8171
Beilstein/Gmelin
490322
Beilstein Reference
5-22-09-00313
EPA OPP
104501
Swiss Giftliste 1
G-10312
Canada DSL/NDSL
NDSL
US TSCA
Listed

Properties.
Formula
C13H12N4O3
Formula mass
272.26
Melting point, °C
223 - 224
Boiling point, °C
474
Vapor pressure, mmHg
4E-9 (25 C)
Solubility in water
Insoluble
pKa/pKb
9.19 (pKb)
Partition coefficient, pKow
1.85
Heat of vaporization
73.7 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
This compound is a solid pesticide. Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Remove and isolate contaminated clothing at the site. 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, Small dry spills: with clean shovel place material into clean, dry container and cover; move containers from spill area. Large spills: dike far ahead of spill for later disposal.
Stability
No data.
Incompatibilities
Incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides Flammable gaseous hydrogen is generated in combination with strong reducing agents, such as hydrides Organic amides/imides react with azo and diazo compounds to generate toxic gases Flammable gases are formed by the reaction of organic amides/imides with strong reducing agents Can react as acids.

Fire.
Flash Point,°C
240
Fire fighting
This compound is a solid pesticide. Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Wear positive pressure breathing apparatus and special protective clothing. Remove and isolate contaminated clothing at the site.This compound is a solid pesticide. Small fires: dry chemical, carbon dioxide, water spray, or foam. Large fires: water spray, fog, or foam. Move container from fire area if you can do so without risk. Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material.

Health.
Poison_Class
1
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 pain, thirst, diarrhea, anorexia, mild pancreatitis, and hypomotility of the gi tract have been reported.
   Inhalation
Chest pain and respiratory failure may occur.
   Eyes
Constriction of the pupil, visual field reduction, retinopathy, nystagmus, and unreactive or sluggishly reactive pupils may occur.

First aid
 
   Ingestion
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   Eyes
If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

Transport.
USCG CHRIS Code
PML