- Name
1,4-Dichloro-2-butyne
- EINECS212-474-8
- CAS No.
821-10-3
- Density1.222 g/cm3
- PSA0.00000
- LogP1.46740
- SolubilityN/A
- Melting Point-34.5ºC
- FormulaC4H4Cl2
- Boiling Point165.5 °C at 760 mmHg
- Molecular Weight122.982
- Flash Point70.7 °C
- Transport InformationUN 2810
- AppearanceClear brown liquid.
- Safety26-36-45-38-36/37/39-28A
- Risk Codes36/37/38-40-23/24/25
- Molecular Structure
- Hazard SymbolsXi,T
- SynonymsXi,T
- Article Data31
1,4-Dichloro-2-butyne Synthetic route
ConditionsConditions | Yield |
---|
With pyridine; thionyl chloride | 84% |
With thionyl chloride In pyridine | 82% |
With pyridine; thionyl chloride at 0 - 20℃; for 2h; | 56% |
ConditionsConditions | Yield |
---|
With N,N-dimethyl-formamide In 1,2-dichloro-ethane at 80℃; | 76% |
ConditionsConditions | Yield |
---|
With thionyl chloride; triethylamine In dichloromethane at 10 - 20℃; | A 54% B 18% |
With pyridine; thionyl chloride In benzene at 10 - 20℃; for 6h; | A 49% B 24% |
With pyridine; thionyl chloride In benzene at 0 - 20℃; | A 40% B 17% |
With pyridine; thionyl chloride In benzene at 0 - 20℃; | A 35% B n/a |
With pyridine; thionyl chloride In benzene 1) 10 - 20 deg C, 7 h, 2) overnight; | A 26% B 30% |
- SOCl2 (excess)
SOCl2 (excess)
ConditionsConditions | Yield |
---|
With dihydrogen hexachloroplatinate In tetrahydrofuran at 85℃; for 4h; | 100% |
With platinum(IV) oxide In toluene at 100℃; for 24h; diastereoselective reaction; | 75% |
dihydrogen hexachloroplatinate | |
With dihydrogen hexachloroplatinate at 170℃; for 1h; | |
- 85972-08-3
(E)-2-(Phenylseleno)-1,3,4-trichlorobut-2-ene
ConditionsConditions | Yield |
---|
In acetonitrile at 25℃; for 20h; | 100% |
1,2,3,4,5-pentakis(chloromethyl)-5-(1'-chlorovinyl)cyclopentadiene
ConditionsConditions | Yield |
---|
With copper dichloride; palladium dichloride In butan-1-ol; benzene at 25℃; for 24h; | 100% |
With copper dichloride; palladium dichloride In methanol; carbon dioxide at 40℃; under 120012 Torr; for 8h; | 98% |
1,4-Dichloro-2-butyne Chemical Properties
Molecular Formula:C
4H
4Cl
2 Molar mass:122.98056g/mol
Structure of 1,4-Dichloro-2-butyne(821-10-3):
Synonyms of 1,4-Dichloro-2-butyne(821-10-3):1,4-DICHLORO-2-BUTYNE;1,4-Dichlorobutyne;
2-Butyne, 1,4-dichloro-;1,4-Dichlorobut-2-yne
Density:1.222 g/cm
3 Flash Point:70.7 °C
Boiling Point:165.5 °C at 760 mmHg
Index of Refraction:1.474
Vapour Pressure:2.46 mmHg at 25°C
Melting point:165-168°C
storage temp:2-8°C
Sensitive:Light Sensitive
1,4-Dichloro-2-butyne Toxicity Data With Reference
1. | | ivn-mus LD50:56 mg/kg | | CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) NX#02969 . |
Carcinogenicity:1,4-Dichloro-2-butyne(821-10-3)- Not listed as a carcinogen by NTP, IARC,ACGIH, or CA Prop 65.
Other: The toxicological properties have not been fully investigated.See actual entry in RTECS for complete information.
1,4-Dichloro-2-butyne Consensus Reports
Reported in EPA TSCA Inventory.
1,4-Dichloro-2-butyne Safety Profile
Poison by intravenous route. When heated to decomposition it emits toxic fumes of Cl
−. Probably a dangerous fire and explosion hazard.See also ACETYLENE COMPOUNDS and ALKYNES and CHLORINATED HYDROCARBONS, ALIPHATIC.
Hazard Codes:Xi
,T
Risk Statements:
23: Toxic by inhalation
24: Toxic in contact with skin
25: Toxic if swallowed
36: Irritating to the eyes
37: Irritating to the respiratory system
38: Irritating to the skin
39: Danger of very serious irreversible effects
40: Limited evidence of a carcinogenic effect
Safety Statements:
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
28: After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer)
36: Wear suitable protective clothing
37: Wear suitable gloves
38: In case of insufficient ventilation, wear suitable respiratory equipment
39: Wear eye/face protection
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
1,4-Dichloro-2-butyne Specification
Stability and Reactivity of 1,4-Dichloro-2-butyne(821-10-3):
Conditions to Avoid:Incompatible materials, light.
Incompatibilities with Other Materials:strong bases,strong oxidizing agents.
Hazardous Decomposition Products: carbon dioxide,hydrogen bromide,Carbon monoxide.