3,4-Dichloro-1-butene

  • 1,2-Dichloro-3-butene
  • 1-Butene, 3,4-dichloro-
Formula
C4H6Cl2
Structure
Description
Colorless liq.
Uses
Chemical intermediate for chloroprene.

Registry Numbers and Inventories.
CAS
760-23-6
EC (EINECS/ELINCS)
212-079-0
RTECS
EM4740000
RTECS class
Mutagen; Reproductive Effector
UN (DOT)
1993
Beilstein/Gmelin
1739135
Beilstein Reference
4-01-00-00772
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H6Cl2
Formula mass
125.00
Melting point, °C
-61
Boiling point, °C
123
Vapor pressure, mmHg
22 (25 C)
Vapor density (air=1)
4.31
Critical temperature
316
Critical pressure
38.0
Density
1.1491 g/cm3 (20 C)
Solubility in water
Slightly soluble
Viscosity
0.0050666 pascal-sec
Surface tension
0.044183 newtons/m @ 212 K
Refractive index
1.4632 (20 C)
Partition coefficient, pKow
2.11
Heat of vaporization
34.0 kJ/mol
Heat of combustion
-2200 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Refrigerator/flammables.
Handling
Wash thoroughly after handling. Wash hands before eating. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Do not ingest or inhale. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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 gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Scoop up with a nonsparking tool, then place into a suitable container for disposal. Remove all sources of ignition. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents and strong bases.
Decomposition
Hydrogen chloride, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
28
Upper exp. limit, %
13.3
Lower exp. limit, %
2.4
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. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Containers may explode when heated. Vapors from liquefied gas are initially heavier than air and spread along ground. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Water may be ineffective. Do NOT get water inside containers. For large fires, use water spray, fog or alcohol-resistant foam. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure effects
Irritability, giddiness, and CNS depression may be seen. Chromosomal abnormalities and testicular damage have been reported. <br>Hydrocephalus and brain herniation have been seen in rat fetuses. <br>Physical and mental defects have been reported in children whose mothers worked in the polymerization area of a chloroprene rubber factory.
   Ingestion
Causes gastrointestinal tract burns.
   Inhalation
Causes severe irritation of upper respiratory tract with coughing, burns, breathing difficulty, and possible coma.
   Skin
Causes skin burns. May cause blistering of the skin. May cause contact dermatitis.
   Eyes
Causes eye burns. May cause irreversible eye injury. Lachrymator.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
1993
Response guide
Hazard class
3
Packing Group
I; II; III
 
USCG CHRIS Code
DCD
 
36 Halogenated hydrocarbons
IMO Chemical Code
17
IMO Pollution Category
B
IMO Hazard code
S/P