Tetradifon

  • 4-Chlorophenyl 2,4,5-trichlorophenyl sulfone
  • 1,2,4-Trichloro-5-((4-chlorophenyl)sulfonyl)-benzene
  • 2,4,4',5-Tetrachlorodiphenyl sulfone
Formula
C12H6Cl4O2S
Structure
Description
Colorless crystalline solid. Odorless.
Uses
Acaricide.

Registry Numbers and Inventories.
CAS
116-29-0
EC (EINECS/ELINCS)
204-134-2
RTECS
WR5850000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Reproductive Effector
Merck
12,9339
Beilstein/Gmelin
2292528
Beilstein Reference
4-06-00-01636
EPA OPP
79202
Swiss Giftliste 1
G-2917
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C12H6Cl4O2S
Formula mass
356.06
Melting point, °C
146.8 - 148.2
Boiling point, °C
142 (20 torr)
Vapor pressure, mmHg
<0.0001 (25 C)
Density
1.515 g/cm3 (20 C)
Solubility in water
Insoluble
Partition coefficient, pKow
4.72

Hazards and Protection.
Storage
Keep in well ventilated area.
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
Self-contained breathing apparatus must be worn. Rubber gloves, hats, suits and boots must be worn.
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 to concentrated and dil alkalis, mineral acids, high temperature and UV light. Low volatility; no loss of wt on exposure at 20 C for 17 hr resistant to hydrolysis by acid or alkali.
Decomposition
Dangerous when heated to decomposition, it emits highly toxic fumes of hydrogen chloride and sulfur oxides.

Fire.
Fire fighting
Self-contained breathing apparatus rubber gloves, hats, suits and boots must be worn. Highly toxic fumes are imminent.

Health.
Poison_Class
5
Exposure effects
CNS excitation, seizures, tremor, ataxia, agitation, nervousness, and amnesia may occur. Kelthane, perthane, methoxychlor, and hexachlorobenzene have little CNS toxicity; in extreme overdose CNS depression may occur. Organochlorine pesticides such as DDT pass through the placenta, with an average level in the newborn blood reaching around a third of that in maternal blood. They can also be found in breast milk. Excessive absorption of kepone (chlordecone) has depressed sperm counts and sperm motility in exposed workers.
   Ingestion
Nausea, vomiting, and diarrhea may follow ingestion.
   Inhalation
Aspiration of insecticide containing petroleum distillate may result in pneumonitis.
   Skin
Extensive contact results in dermal irritation.

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. Wash skin and hair thoroughly; do two soap and water washings. Leather absorbs pesticides. Hence, leather should not be worn in the presence of pesticides and all contaminated leather should be discarded.
   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.