29576-14-5

29576-14-5 - Names and Identifiers

Name	2-Butene, 1-bromo-,(2E)-
Synonyms	(E)-Crotyl bromide (E)-1-bromobut-2-ene trans-Crotyl bromide (E)-4-Bromo-2-butene (E)-1-Bromo-2-butene (2E)-1-Bromobut-2-ene trans-Crotyl bromide (2E)-1-Bromo-2-butene trans-1-bromo-2-butene 1-Bromo-trans-2-butene (2E)-1-Bromobut-2-ene 2-butene,1-bromo-,(E)- trans-4-Bromo-2-butene (E)-But-2-enyl bromide trans-1-bromo-but-2-ene trans-1-Bromo-2-butene 2-Butene, 1-bromo-,(2E)- trans-But-2-enyl bromide (E)-2-Buten-1-yl bromide 2-Butene,1-bromo-, (E)- (8CI)
CAS	29576-14-5
InChI	InChI=1S/C4H7Br/c1-2-3-4-5/h2-3H,4H2,1H3/b3-2+
InChIKey	AVMHMVJVHYGDOO-NSCUHMNNSA-N

29576-14-5 - Physico-chemical Properties

Molecular Formula	C4H7Br
Molar Mass	135
Density	1.312g/mLat 25°C(lit.)
Melting Point	-115.07°C (estimate)
Boling Point	97-99°C(lit.)
Flash Point	11°C
Appearance	Liquid
Color	Clear light yellow to yellow-brown
BRN	1361394
Storage Condition	2-8°C
Refractive Index	n20/D 1.480(lit.)

29576-14-5 - Risk and Safety

Risk Codes	R11 - Highly Flammable R36/37 - Irritating to eyes and respiratory system. R36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S27 - Take off immediately all contaminated clothing. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S37/39 - Wear suitable gloves and eye/face protection
UN IDs	1993
WGK Germany	3
HS Code	29033990
Hazard Class	3.1
Packing Group	II

29576-14-5 - Reference Information

EPA chemical information

Information provided by: ofmpub.epa.gov (external link)

production method

38.4g(0.53mol) of trans-crottol and 15mL of anhydrous pyridine are added to a 250mL four-mouth bottle equipped with mechanical stirring, low temperature thermometer, 50mL constant pressure drop funnel and calcium chloride drying tube. Under rapid stirring at 15 ℃, slowly add 21mL phosphorus tribromide dropwise, and then cool down to 10 ℃ and stir for 1h. Then, vacuum distillation (1.59kPa) is carried out, the external bath is kept at room temperature, and condensed and collected by dry ice-ethanol bath, and the distilled product is immediately put into ice water. The oil layer is separated and washed to neutral with 0 ℃ sodium bicarbonate aqueous solution. Anhydrous sodium sulfate was dried twice to obtain 58g of product with 81% yield, capillary chromatography analysis and 98% purity.

Last Update：2024-04-10 22:29:15