Substance profile
1,4-Dichloro-2-butene
1,4-Dichloro-2-butene is a colorless liquid with a sweet, pungent odor.
01 · Identification
What 1,4-Dichloro-2-butene is
1,4-Dichloro-2-butene is a colorless liquid with a sweet, pungent odor. Its molecular formula is C4H6Cl2 and its molecular weight is 124.99 g/mol. It boils at 158 °C, melts at 3.5 °C, is soluble in water.
Under the GHS it carries the signal word Danger.
Other names for 1,4-Dichloro-2-butene
- 1,4-dichlorobut-2-ene
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H350 | May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H330 | Fatal if inhaled. |
| H311 | Toxic in contact with skin. |
| H301 | Toxic if swallowed. |
| H314 | Causes severe skin burns and eye damage. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P260, P270, P271, P273, P280, P301, P302, P304, P308, P310, P313, P330, P331, P352, P391, P501
03 · Physical and chemical properties
1,4-Dichloro-2-butene properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 158 °C (316.4 °F) | HSDB | |
| 156.11 °C (313 °F) | at 760 mmHg | CAMEO | |
| 158 °C (316.4 °F) | at 760 mmHg | DOE PAC | |
| Melting point | 3.5 °C (38.3 °F) | HSDB | |
| -47.78 °C (-54 °F) | CAMEO | ||
| Density | 1.1858 g/cm³ | HSDB | |
| 1.183 g/cm³ | technical grade mixture | HSDB | |
| 1.112 g/cm³ | at 20 °C | CAMEO | |
| Solubility | Miscible with benzene, alc, carbon tetrachloride; immiscible with ethylene glycol and glycerol. | HSDB | |
| Soluble in ether. | HSDB | ||
| Water solubility = 580 mg/l at 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 3 mmHg | at 25 °C | HSDB |
| 3 mmHg | Haz-Map | ||
| Lower explosive limit (LEL) | 1.5 % by volume | CAMEO | |
| 1.5-4.0% | Dichlorobutene | HSDB | |
| Vapor may explode if ignited in an enclosed area. | Dichlorobutene | HSDB | |
| Upper explosive limit (UEL) | 4 % by volume | CAMEO | |
| Corrosivity | Corrodes metal when wet. | Dichlorobutene | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 1,4-Dichloro-2-butene
Storage conditions
Storage temperature: ambient /Dichlorobutene/
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
/Dichlorobutene/ reacts slowly with water to form hydrochloric acid. /Dichlorobutene/
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
Halogenated unsaturated aliphatic compounds, such as 1,4-DICHLORO-2-BUTENE, are moderately or very reactive. Halogenated organics generally become less reactive as more of their hydrogen atoms are replaced with halogen atoms. Low molecular weight haloalkanes are highly flammable and can react with some metals to form dangerous products. Materials in this group are incompatible with strong oxidizing and reducing agents. Also, they are incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 1,4-Dichloro-2-butene in the storage compatibility matrix →