Oryzalin

  • 3,5-Dinitro-n4,n4-dipropylsulfanilamide
  • 3,5-Dinitro-n4,n4-dipropylsulphanilamide
  • 4-(Dipropylamino)-3,5-dinitrobenzene sulfonamide
  • Dirimal
  • El-119
  • Surflan
Formula
C12H18N4O6S
Structure
Description
Yellow-orange crystals.
Uses
Herbicide.

Registry Numbers and Inventories.
CAS
19044-88-3
EC (EINECS/ELINCS)
242-777-0
RTECS
WO9350000
RTECS class
Agricultural Chemical and Pesticide; Mutagen
Merck
12,7015
Beilstein/Gmelin
2177305
EPA OPP
104201
Swiss Giftliste 1
G-3761
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C12H18N4O6S
Formula mass
346.36
Melting point, °C
137-138
Decomposition point, °C
265
Vapor pressure, mmHg
1E-8
Density
1.2 g/cm3
pKa/pKb
9.4 (pKa)
Partition coefficient, pKow
3.73 (pH 7)

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 goggles, coveralls, long-sleeved shirt and impermeable gloves.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
Stable under normal storage conditions. Decomposed by UV irradiation. The shelf life of these formulations is more than 2 years.
Incompatibilities
Strong oxidizing agents.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.
Fire potential
Flammable solid technical oryzalin

Health.
Poison_Class
4
Exposure effects
Some studies have implicated oryzalin as an agent that might cause heart defects, but the relationship is not well documented.
   Skin
Animal testing has shown a mild irritant effect. This agent is not caustic.

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
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.