immiscible with water.
- 20 °C(lit.)
197 °C at 760 mmHg
UN 2810 6.1/PG 3
Clear, colorless liquid
1,4-Dibrombutan;DBB;1,4 Dibromo Butane;1,4-Butylene Bromide;1,4-Dibromobutane / Tetramethylene Dibromide;1,4-Dibromobutene;Tetramethylene dibromide;Butane, 1,4-dibromo-;Butane,1,4-dibromo-;
1. Introduction of 1,4-Dibromobutane
1,4-Dibromobutane is a kind of Pharmaceutical intermediates, it is also called Dibromobutane; tetramethylene bromide; Tetramethylene dibromide.
2. Properties of 1,4-Dibromobutane
Melting Point: - 20 °C(lit.)
Boiling Point: 197 °C at 760 mmHg
Flash Point: 65.2 °C
Solubility: immiscible with water.
Appearance: Clear, colorless liquid
3. Toxicity of 1,4-Dibromobutane
mmo-sat 10 µmol/plate
MUREAV Mutation Research. 141 (1984),11.
ipr-mus LD50:300 mg/kg
ARZNAD Arzneimittel-Forschung. Drug Research. 14 (1964),668.
4. Safety Information of 1,4-Dibromobutane
Hazard Codes : T, Xi, C (Toxic;Irritant;Corrosive)
Risk Statements :25-41-36/37/38 (Toxic if swallowed ;Risk of serious damage to eyes ;Irritating to eyes, respiratory system and skin )
Safety Statements :26-45-37/39 (In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) ;Wear suitable gloves and eye/face protection )
RIDADR :UN 2810 6.1/PG 3
WGK Germany : 2
RTECS : EJ7565000
5. Preparation of 1,4-Dibromobutane
1,4-Dibromobutane can be from THF via the open-loop, bromide derived. added hydrobromic acid,then add THF dropwise under stirring , and then dropping sulfuric acid,the temperature should be controlled at below 50 ℃. And then heated to 108 ℃ or so back 4h, after reaction continue stiring for 1h,when it is cold, take the subnatant,wash to neutral with soda solution, then add anhydrous calcium chloride for drying, filtration,then it is finished.
6. Use of 1,4-DIBROMOBUTANE
1,4-DIBROMOBUTANE can be used in organic intermediates.