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| CAS No.: | 3234-02-4 |
|---|---|
| Name: | trans-2,3-Dibromo-2-butene-1,4-diol |
| Molecular Structure: | |
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|
|
| Formula: | C4H6Br2O2 |
| Molecular Weight: | 245.898 |
| Synonyms: | 2,3-Dibromo-2-butene-1,4-diol;NSC 76595;2,3-Dibromobutene-1,4-diol;AI3-26932;CCRIS 4781; |
| EINECS: | 221-779-5 |
| Density: | 2.252 g/cm3 |
| Melting Point: | 112-114°C(lit.) |
| Boiling Point: | 318.1 °C at 760 mmHg |
| Flash Point: | 146.2 °C |
| Solubility: | 1-5 g/100 mL at 21 ºC |
| Appearance: | white crystalline powder |
| Hazard Symbols: | R36/37/38:; |
| Risk Codes: | Xi:Irritant; ">  Xi:Irritant; |
| Safety: | 26-37/39 |
| PSA: | 40.46000 |
| LogP: | 0.97240 |
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| Conditions | Yield |
|---|---|
| With tetraethylammonium bromide; bromine In dichloromethane at 20 - 30℃; for 8h; Green chemistry; | 95% |
| With hexamethonium bis(tribromide) In neat (no solvent) for 0.333333h; Green chemistry; regioselective reaction; | 88% |
| With tetrabutylammomium bromide; dihydrogen peroxide; vanadia In water; acetonitrile at 5℃; for 1.5h; Bromination; | 46% |
- 3234-02-4
2,3-dibromo-but-2-ene-1,4-diol
| Conditions | Yield |
|---|---|
| With sodium ethanolate |
- 3234-02-4
2,3-dibromo-but-2-ene-1,4-diol
- 32460-02-9
3,4-dibromofuran
| Conditions | Yield |
|---|---|
| With potassium dichromate; sulfuric acid In hexane; water at 85℃; for 6h; Heating; | 83% |
| With potassium dichromate; sulfuric acid In water at 140℃; for 4h; | 56% |
| Conditions | Yield |
|---|---|
| With ethanol; zinc |
- 3234-02-4
2,3-dibromo-but-2-ene-1,4-diol
- 75-36-5
acetyl chloride
- 63766-44-9
1,4-diacetoxy-2,3-dibromo-but-2-ene
| Conditions | Yield |
|---|---|
| With sodium hydroxide In water; toluene at 70 - 72℃; for 4h; | 42.5 g |
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Chemistry
Molecular Structure:
Molecular Formula: C4H6Br2O2
Formula Weight: 245.9
IUPAC Name: (E)-2,3-dibromobut-2-ene-1,4-diol
Synonyms of Trans-2,3-dibromo-2-butene-1,4-diol (CAS NO.3234-02-4): 2,3-Dibromobut-2-ene-1,4-diol ; (E)-2,3-Dibromo-2-butene-1,4-diol ; Mitolactol ; Dibromoducitol ; 4-Diol,2,3-dibromo-2-butene-1
Melting Point: 112-114 °C(lit.)
Polar Surface Area: 18.46 Å2
Molar Refractivity: 38.85 cm3
Molar Volume: 109.1 cm3
Surface Tension: 63.8 dyne/cm
Enthalpy of Vaporization: 64.86 kJ/mol
Flash Point: 146.2 °C
Boiling Point: 318.1 °C at 760 mmHg
Density of Trans-2,3-dibromo-2-butene-1,4-diol (CAS NO.3234-02-4): 2.252 g/cm3
Vapour Pressure: 3.07E-05 mmHg at 25°C
Index of Refraction: 1.63
Water Solubility: 1-5 g/100 mL at 21 °C
Appearance: Trans-2,3-dibromo-2-butene-1,4-diol (CAS NO.3234-02-4) is a white crystalline powder
Stability: Trans-2,3-dibromo-2-butene-1,4-diol (CAS NO.3234-02-4) is stable. Incompatible with strong oxidizing agents.
Classification Code: Mutation data
Uses
Trans-2,3-dibromo-2-butene-1,4-diol (CAS NO.3234-02-4) is used in organic synthesis as a pharmaceutical intermediate.
Toxicity Data With Reference
| 1. | mic-sat 33 µL/plate | ENMUDM Environmental Mutagenesis. 9 (Suppl 9)(1987),1. |
Consensus Reports
Reported in EPA TSCA Inventory.
Safety Profile
Hazard Codes: 
Xi
Risk Statements: 36/37/38
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S37/39: Wear suitable gloves and eye/face protection.
WGK Germany: 3
RTECS: EM6910000
Hazard Note; Irritant
Mutation data reported. When heated to decomposition it emits toxic vapors of Br−.
Standards and Recommendations
ASSAY: 98.5% min
LOSS ON DRYING: 0.5% max
Specification
Trans-2,3-dibromo-2-butene-1,4-diol (CAS NO.3234-02-4) is a white crystalline powder mainly used as a brominated flame retardant or chemical intermediate. It is stable under ordinary conditions and is probably combustible.