3,5-Dimethylpyrazole

3,5-Dimethylpyrazole (CAS 67-51-6, EC 200-657-5) is a nitrogen-containing heterocyclic compound also known by trade designations including Trixene DP 8692 and identifiers such as NSC 8729 and TH 564. It carries no assigned E-code and is classified under HS code 29331990 within the broader category of pharmaceutical intermediates.

In pharmaceutical synthesis, 3,5-Dimethylpyrazole serves as a blocking agent for isocyanate groups, controlling reaction selectivity during active ingredient manufacturing. In agriculture, it functions as a nitrification inhibitor, slowing the bacterial conversion of ammonium to nitrate in soil and reducing nitrogen loss from fertilizers. It also finds application as a biocidal preservative in water treatment and personal care formulations.

This material is supplied as a crystalline powder meeting REACH registration requirements for the European market. It is available in standard laboratory and bulk industrial quantities, with documentation packages including SDS and COA provided upon request. Buyers should confirm grade specifications against their application requirements prior to ordering.