Methylene bis(thiocyanate)

Methylene bis(thiocyanate) (CAS 6317-18-6) is a sulfur-containing biocidal compound commercially available under trade names including Proxel MB, Busan 110, Kilstain, and V 709. It carries no assigned E-code and is classified under HS code 29309090 for customs purposes across EU member states.

In water treatment and pulp and paper processing, it functions as a broad-spectrum antimicrobial by releasing thiocyanate ions that disrupt microbial enzyme activity, inhibiting bacterial and fungal growth in recirculating systems and slurries. It is also evaluated as a heat stabilizer in specific formulation contexts where sulfur-donor chemistry is relevant.

Methylene bis(thiocyanate) is supplied as a yellow crystalline solid and must comply with REACH registration requirements for EU market access. Procurement teams should confirm supplier SDS documentation, purity grade specifications, and packaging formats, as these vary by application sector and regional regulatory requirements.