Ioxynil

  • 3,5-Diiodo-4-hydroxybenzonitrile
  • 4-Cyano-2,6-diiodophenol
  • 4-Hydroxy-3,5-diiodobenzonitrile
Formula
C7H3I2NO
Structure
Description
Colorless crystalline solid. Faint phenolic /tech grade/.
Uses
Molluscicide, herbicide.

Registry Numbers and Inventories.
CAS
1689-83-4
EC (EINECS/ELINCS)
216-881-1
EC Index Number
608-007-00-6
EC Class
Toxic for reproduction Category 3; Toxic; Harmful; Dangerous for the Environment
R 21 25 50/53 63
S 36/37 45 60 61
RTECS
DI4025000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Human Data
UN (DOT)
2588
Beilstein/Gmelin
2364041
Beilstein Reference
3-10-00-00373
EPA OPP
353200
Swiss Giftliste 1
G-1696
New Zealand
Listed

Properties.
Formula
C7H3I2NO
Formula mass
370.91
Melting point, °C
212
Boiling point, °C
378
Vapor pressure, mmHg
2.77X10-5 at 105 C
Critical temperature
639
Critical pressure
43.4
Solubility in water
Insoluble
Partition coefficient, pKow
0.90 at pH 6.5

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Store protected from light.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents.
Decomposition
Carbon monoxide, oxides of nitrogen, irritating and toxic fumes and gases, carbon dioxide, hydrogen iodide.

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. Non-combustible, substance itself does not burn but may decompose upon heating to produce irritating, corrosive and/or toxic fumes. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Non-Combustible
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
Possible risk of harm to the unborn child.
   Ingestion
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Human fatalities have been reported from acute poisoning. May cause an abrupt rise in body temperature, convulsions, and coma.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2588
Response guide
Hazard class
6.1
Packing Group
I; II; III