Chloromethylation Chloromethylations of alcohols and carboxylic acid derivatives yield the corresponding chloromethyl ethers and esters. This reaction is based on patented SF-Chem technology with paraformaldehyde in the first step and Thionyl chloride or HCl in the second step. This technology guarantees very low contents of Bischloro methyl ether in the final product. Reaction scheme Strengths - very low content of Bischloromethyl ether (< 10 ppm) - patented SF-Chem technology For specific products please check product groups carboxylic acid derivatives, and ethers/thioethers.