2-Phenyl-2-imidazoline

2-Phenyl-2-imidazoline (CAS 936-49-2) is a cyclic amidine compound commercially available under the trade names Vestagon B 31, Veba B 31, and Acetomer 31, with the abbreviation PIN also in common use. It carries no assigned E-code and is classified under HS code 29332900.

In epoxy resin systems, 2-Phenyl-2-imidazoline acts as a latent curing catalyst, accelerating ring-opening polymerisation at elevated temperatures without premature activation at ambient conditions. It also functions as a corrosion inhibitor in metalworking fluids and water treatment formulations, where its nitrogen lone pairs coordinate to metal surfaces, forming a protective adsorption layer.

The compound is supplied as a light yellow to yellow crystalline powder and is subject to REACH registration requirements for EU market placement. Procurement quantities are available in standard industrial packaging, and documentation including SDS and CoA is provided upon request to support regulatory and quality assurance workflows.