Methyl pent-4-ynoate

Name: Methyl pent-4-ynoate
Brand: ChemScene
Availability: InStock
Rating: 5 (1 reviews)

CAS No. 21565-82-2
Cat. No. CS-0137200
Purity≥95%
MDL No.MFCD12025043

HazMat Fee +

HazMat Fee

An item is classified as a dangerous good if our website displays Hazardous Material (HazMat) information for it. There is a HazMat shipping fee for each item that qualifies as a dangerous good, except in the following scenarios:

The shipment is processed through FedEx Ground under the Limited Quantity option.

Each bottle is packed as an Excepted Quantity, with a maximum of 1g for items in class 6.1 packing group I or II, and up to 25g for all other hazardous materials.

If shipping is charged to your FedEx account, the HazMat fee will be billed directly by the courier. Otherwise, the fee will be included on your invoice. To help you avoid the HazMat fee, we can package a 5g order of a class 6.1 packing group I or II material as five separate 1g units, and a 100g order of any other dangerous good as four 25g units. This packaging adjustment will be made unless you instruct otherwise on your purchase order. Below, you will find the fee schedule from FedEx for handling hazardous materials.

Type	HazMat Fee
Excepted Quantity	$0.00
FedEx Limited Quantities Ground	$0.00
Hazmat Ground shipping	$50.00+
Inaccessible (Haz class 6.1 or 9), Domestic	$68.00+
Accessible (Haz class 3, 4, 5 or 8), Domestic	$158.00+
Inaccessible (Haz class 6.1 or 9), International	$108.00+
Accessible (Haz class 3, 4, 5 or 8), International	$238.00+

An item is classified as a dangerous good if our website displays Hazardous Material (HazMat) information for it.

There is a HazMat shipping fee for each item that qualifies as a dangerous good. Please contact our quotation team via email to confirm the details.

*For research and further manufacturing use only, not for direct human use.

Structure of 21565-82-2

Size

Price

Quantity

* Please select Quantity before adding items.

Description

Methyl pent-4-ynoate is a linear alkyne-containing ester featuring a terminal acetylene group flanked by a methyl ester. This compound serves as a valuable building block in transition-metal-catalyzed coupling reactions, where the alkyne moiety enables efficient C–C bond formation. Its stability under standard conditions and compatibility with palladium- and copper-based catalytic systems make it well-suited for synthetic applications in organic and medicinal chemistry.

Application

Methyl pent-4-ynoate serves as a versatile building block in synthetic organic chemistry, enabling efficient access to conjugated enynes and functionalized heterocycles. Its terminal alkyne moiety facilitates reliable copper-catalyzed coupling reactions, while the ester group supports selective transformations under mild conditions. The compound exhibits excellent bench stability and is readily purified by distillation or flash chromatography, making it well-suited for iterative synthesis and scale-up applications.

General Information

CAS No. 21565-82-2
Cat. No. CS-0137200
Purity ≥95%
MDL No. MFCD12025043
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₆H₈O₂
Molecular Weight 112.13
Synonym(s) Pent-4-ynoic acid methyl ester
SMILES C#CCCC(OC)=O

Computational Chemistry Data

TPSA 26.3
LogP 0.5728
H_Acceptors 2
H_Donors 0
Rotatable_Bonds 2

Safety Information

Download SDS

GHS Pictogram :	GHS No : GHS02,GHS07
Signal Word : Danger	UN#: 3272
Class : 3	Packing Group : Ⅲ
Hazard Statements : H225-H315-H319-H335
Precautionary Statements : P210-P233-P240-P241-P242-P243-P261-P264-P271-P280-P302+P352-P304+P340-P362+P364-P370+P378-P405-P501

Quality Control

To search for quality control of cas , please enter both the product number and the lot/batch number.

Other Classifications

Building Blocks Functional Group Ester

Building Blocks Skeleton Fatty chain compounds

Life Science Click Chemistry Reagents Alkyne

Chemical Biology Pharmaceutical Development and Drug Discovery Research Conjugation Chemistry/Click Chemistry Terminal Alkynes

Chemical Biology Conjugation Chemistry/Click Chemistry Terminal Alkynes

Key Words

Methyl pent-4-ynoate sigmaMethyl pent-4-ynoate manufacturerMethyl pent-4-ynoate priceMethyl pent-4-ynoate structureMethyl pent-4-ynoate SDSbuy Methyl pent-4-ynoateMethyl pent-4-ynoate supplierMethyl pent-4-ynoate usesMethyl pent-4-ynoate molecular weightprice of Methyl pent-4-ynoateMethyl pent-4-ynoate chemical name formula of Methyl pent-4-ynoate

Salutation:	*Country or Region:
*Applicant Name:	*Organization Name:
*Email Address:	Quantity:
CAS NO. :	Product Name:
Remarks:
Upload Pictures

CAS.No.		Product Name
Applicant Name *		Email Address *
Phone Number *		Organization Name*
Country or Region*		Quantity*
Remarks:

Product Name:
Cat. No.: .		CAS NO. :
Quantity:

Methyl pent-4-ynoate

CAS No. 21565-82-2

Recommended Products