Description

3-Methyl-1-Butyne is a highly volatile, terminal alkyne with significant utility as a versatile building block in organic synthesis. Its unique structure makes it a valuable precursor for creating complex molecules, including pharmaceuticals, agrochemicals, and specialty polymers. This compound is essential for research and development chemists, process engineers, and manufacturers in the fine chemical, pharmaceutical, and material science industries seeking to introduce branched alkyl or functionalized alkynyl groups into their target molecules.

Application

• Pharmaceutical Intermediates: Serves as a key synthon in the synthesis of active pharmaceutical ingredients (APIs), particularly for introducing specific carbon frameworks.
• Agrochemical Synthesis: Used in the production of advanced pesticides, herbicides, and plant growth regulators that require tailored hydrocarbon chains.
• Specialty Polymer & Material Science: Acts as a monomer or co-monomer in the development of novel polymers with specific thermal or mechanical properties.
• Organic Synthesis & Catalysis: A fundamental reagent in cross-coupling reactions (e.g., Sonogashira), cycloadditions, and other metal-catalyzed transformations.
• Flavor & Fragrance Industry: Employed in the synthesis of complex aroma chemicals and flavoring agents.
• Research & Development: Critical for academic and industrial R&D labs exploring new synthetic methodologies and compound libraries.

Basic Information

Product Name	3-Methyl-1-Butyne
CAS No.	598-23-2
Molecular Formula	C5H8
Molecular Weight	68.12 g/mol
Synonyms	Isopropylacetylene; 3-Methylbut-1-yne; Isopropylethyne; 1-Butyne, 3-methyl-; 2-Methyl-3-butyne; UN 2452 (Proper Shipping Name: Propylene, methyl-)
EINECS	209-915-7

Quality Control

Our 3-Methyl-1-Butyne is produced and handled under stringent quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as identity, assay, and impurity profiles. Our quality commitment aligns with cGMP principles where applicable, supporting its use in regulated synthesis pathways.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat, sparks, and open flames. Due to its highly volatile nature, containers must be kept tightly sealed and upright to prevent leakage and pressure build-up. Recommended storage temperature is 2-8°C (refrigerated) for extended stability, though short-term storage at controlled room temperature (15-25°C) is acceptable.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Related Substances (GC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.