4-Bromobut-1-yne

Name: 4-Bromobut-1-yne
Brand: SynthonLab
SKU: 38771-21-0

CAS 38771-21-0 C₄H₅Br 132.99 g/mol Catalogue item Internal Alkynes

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Structure of 4-Bromobut-1-yne, CAS 38771-21-0 — Structure · C4H5Br

CAS number: 38771-21-0
Molecular formula: C₄H₅Br
Molecular weight: 132.99 g/mol
Standard packing: 1kg / 25kg / 100kg

4-Bromobut-1-yne (CAS 38771-21-0) is a C4H5Br alkyne building block supplied in kilogram lots.

Terminal alkynes also dimerise and oligomerise under the wrong conditions, so the copper and palladium loading of the coupling step is the thing to control.

The formula C4H5Br resolves to 4 carbons with one bromine. Short-chain entries of this size are volatile enough that headspace and packing matter: the lot is shipped in sealed units and opened in a fume hood.

Handling and storage

Alkynes are held closed, dry and out of direct light; the silylated entries are also moisture sensitive and are packed under inert gas.

Ordering

Shipped in 1kg / 25kg / 100kg units with a batch certificate of analysis and a GHS safety data sheet; a smaller sample can be quoted separately. Release testing covers identity and assay; the impurity profile is available on request rather than being printed on this page.

Other internal alkynes entries

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1073132-25-8	(5Z)-5-Tetradecen-1-yne	C₁₄H₂₄	192.34	1kg / 25kg / 50kg	Request
62992-46-5	2-(Pent-4-yn-1-yloxy)tetrahydro-2H-pyran	C₁₀H₁₆O₂	168.23	1kg / 25kg / 100kg	Request
7218-43-1	2-[2-(Prop-2-ynyloxy)ethoxy]ethan-1-ol	C₇H₁₂O₃	144.17	1kg / 25kg / 100kg	Request
1719-19-3	2-Methyl-4-phenyl-3-butyn-2-ol	C₁₁H₁₂O	160.21	1kg / 25kg / 100kg	Request
2028-63-9	3-Butyn-2-ol	C₄H₆O	70.09	1kg / 25kg / 100kg	Request
1423-60-5	3-Butyn-2-one	C₄H₄O	68.07	1kg / 25kg / 100kg	Request
40365-61-5	3-Butynyl tetrahydro-2H-pyran-2-yl ether	C₉H₁₄O₂	154.21	1kg / 25kg / 100kg	Request
3355-31-5	3-Chloro-1-phenyl-1-propyne	C₉H₇Cl	150.60	1kg / 25kg / 100kg	Request

Specification

CAS	38771-21-0
Formula	C₄H₅Br
Molecular weight	132.99 g/mol
Packing	1kg / 25kg / 100kg
Assay	lot specific, on COA
Appearance	see COA
Storage	cool, dry, inert

Ordering

Catalogue items ship from stock or are made to order, whichever the lot status requires. A gram-scale sample is available before a kilo lot is committed.

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Or email [email protected] quoting 38771-21-0.

Supplied for laboratory and industrial use. Not for drug, cosmetic or household use.

Quotation

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Entry	4-Bromobut-1-yne
CAS	38771-21-0
Typical lead time	Stock or 2–4 weeks
Documentation	COA, SDS, spec sheet

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4-Bromobut-1-yne (38771-21-0)

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