4-Ethynyl-1-methyl-1H-pyrazole

It is used primarily as a heterocyclic building block in chemical and medicinal chemistry research. Its terminal alkyne makes it valuable for Sonogashira cross-couplings and copper-catalysed azide-alkyne cycloaddition (click) reactions to build more complex molecules and pharmaceutical intermediates.

Its CAS number is 39806-89-8 and its molecular formula is C6H6N2, corresponding to a molecular weight of 106.13 g/mol. It is an N-methylpyrazole bearing an ethynyl (terminal alkyne) substituent at the 4-position.

Tech Serve Solutions supplies 4-Ethynyl-1-methyl-1H-pyrazole as a research and synthesis grade building block. We do not represent it as a USP, BP or EP pharmacopoeial grade. Exact assay and lot-specific specifications are confirmed on the certificate of analysis at the time of enquiry.

Handle it as a research chemical using good laboratory practice: wear suitable gloves and eye protection, work in a fume hood and avoid release to the environment, as it carries German Water Hazard Class WGK 3 (severely hazardous to water). Store in a tightly closed container in a cool, dry, well-ventilated area away from incompatible materials, and always consult the current Safety Data Sheet before use.

It is packed in appropriately sealed laboratory and bulk containers with full labelling and documentation, and exported worldwide in line with applicable transport and dangerous-goods regulations. Packaging sizes and shipping arrangements are tailored to each order, with a certificate of analysis and Safety Data Sheet provided.

Contact Tech Serve Solutions with your required quantity, intended packaging and delivery destination, and our team will respond with availability, lead time and documentation. Samples can be arranged subject to availability and regulatory requirements.