Trimethyl borate

Trimethyl borate (CAS 121-43-7), also referred to as TMB, is a boron-containing ester used as a reactive intermediate and functional additive across chemical manufacturing. It acts as a boron source in synthesis and a flame retardant precursor. The compound also serves as a stabilizing agent in polymer and agrochemical formulations. In agrochemical production, TMB serves as a boron donor in the synthesis of active ingredients and micronutrient formulations targeting boron-deficient crops.

Polymer and plastics manufacturers incorporate it as a flame retardant additive and thermal stabilizer. This is particularly useful in coatings and resin systems where controlled boron delivery is required for performance. The pharmaceutical and fine chemical sectors use TMB as a reagent in borylation reactions and as a precursor to boronic acid derivatives. These applications require high precision and consistent chemical properties.

In textile and paper processing, it functions as a biocidal and pH-buffering agent applied during treatment baths and finishing stages. This versatility makes it a staple in diverse industrial processing environments. Trimethyl borate is supplied as a colorless liquid, typically in drum and IBC packaging suited for industrial volumes. Standard commercial grades include technical and reagent-grade specifications for various needs.

Purity levels commonly range from 97% to 99%+, meeting rigorous industrial requirements. Buyers should confirm moisture sensitivity requirements with suppliers, as grade selection affects handling and storage conditions.