Product Identification

Product Name

cis-1,4-Dichloro-2-butene

Synonyms

(Z)-1,4-Dichlorobutene
2-Butene, 1,4-dichloro-, (2Z)-
cis-1,2-Bis(chloromethyl)ethene
cis-1,4-Dichloro-2-butene
cis-2,3-Dichlorobut-2-ene

CAS

1476-11-5

Formula

C4H6Cl2

Molecular Weight

125

EINECS

216-021-5

Beilstein/Gmelin

1719692

Beilstein Reference

4-01-00-00787

Physical and Chemical Properties

Appearance

Colorless liquid.

Solubility in water

Slightly soluble

Melting Point

-48

Boiling Point

152

Vapor Pressure

4

Density

1.1363 g/cm3 (20 C)

Partition Coefficient

2.5

Heat Of Vaporization

37.6 kJ/mol

Heat Of Combustion

-5063 kJ/mol

Usage

Dichloroprenes are used as nematocides and as intermediates in the manufacture of pesticides. Dichloroprenes.

Refractive Index

1.4870 (20 C)

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

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.

Hazards

Flashback along vapor trail may occur.

UN (DOT)

2927

Exposure Controls/Personal Protection

Personal 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).

Fire Fighting Measures

Flash Point

55

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.

Upper exp. limit

12.7

Lower exp. limit

2.5

Fire Potential

Flammable dichlorobutene

Accidental Release Measures

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 and Reactivity

Stability

Reacts slowly with water to form hydrochloric acid. Dichlorobutene.

Decomposition

Decomposition vapors contain phosgene and hydrogen chloride gases; both are toxic and irritating.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2927

Hazard Class

6.1

Packing Group

I; II