cis-1,4-Dichloro-2-butene

  • 2-Butene, 1,4-dichloro-, (2Z)-
  • (Z)-1,4-Dichlorobutenecis-1,2-Bis(chloromethyl)ethene
Formula
C4H6Cl2
Structure
Description
Colorless liquid.
Uses
Dichloroprenes are used as nematocides and as intermediates in the manufacture of pesticides. Dichloroprenes.

Registry Numbers and Inventories.
CAS
1476-11-5
EC (EINECS/ELINCS)
216-021-5
UN (DOT)
2927
Beilstein/Gmelin
1719692
Beilstein Reference
4-01-00-00787
RCRA
U074
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C4H6Cl2
Formula mass
125.00
Melting point, °C
-48
Boiling point, °C
152
Vapor pressure, mmHg
4
Critical temperature
367
Critical pressure
37.3
Density
1.1363 g/cm3 (20 C)
Solubility in water
Slightly soluble
Viscosity
0.0035678 pa-sec @ melting point
Surface tension
24 g/s2
Refractive index
1.4870 (20 C)
Partition coefficient, pKow
2.5
Heat of vaporization
37.6 kJ/mol
Heat of combustion
-5063 kJ/mol

Hazards and Protection.
Storage
Material can be stored at room temperature with open venting and equipped with a flame arrester. Dichlorobutene
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 clothing to prevent any reasonable probability of skin contact. Wear eye protection to prevent any possibility of eye contact.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
Reacts slowly with water to form hydrochloric acid. Dichlorobutene.
Decomposition
Decomposition vapors contain phosgene and hydrogen chloride gases; both are toxic and irritating.

Fire.
Flash Point,°C
55
Upper exp. limit, %
12.7
Lower exp. limit, %
2.5
Fire fighting
If material on fire or involved in fire: Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Solid streams of water may be ineffective. Use foam, dry chemical, or carbon dioxide. Use water spray to knock-down vapors.
Fire potential
Flammable dichlorobutene
Hazards
Flashback along vapor trail may occur.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
   Ingestion
Nausea, vomiting and diarrhea are possible if ingested.
   Inhalation
Cough, tachypnea, and wheezing are common after inhalation.
   Skin
Redness, swelling and pain may occur.
   Eyes
Irritants may cause swelling, redness and pain at any site, especially at mucous membranes. The mouth, nose, and eyes are susceptible to these effects.

First aid
 
   Ingestion
Emesis is not indicated due to the irritant nature of these agents. Charcoal - not recommended; it may promote vomiting and make endoscopic evaluation difficult. Dilution: immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 4 ounces/120 ml in a child). Neutralization - neutralization is not indicated. Although these agents are irritants, and therefore should not produce tissue damage, it is almost impossible to assure that a particular substance under a particular set of circumstances would not cause damage. Therefore, each patient should be examined with the idea that mucous membrane damage might have occurred.
   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 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
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. If in a medical facility, sterile saline should be used to irrigate the eyes until the cul de sac is returned to neutrality. Some alkali exposures may require prolonged irrigation.

Transport.
UN number
2927
Response guide
Hazard class
6.1
Packing Group
I; II
 
USCG CHRIS Code
CLF
 
36 Halogenated hydrocarbons