SIMATIC S7-200, battery module BC 291 for long-term buffering of data,pluggable into memory module receptacle of S7-22X CPU duty to supply information according to article 33, REACH regulation: the product contains the following substance from the candidate list in concentrations exceeding 0.1% by weight: 1,2-Dimethoxyethane, ethylene glycol dimethyl ether (EGDME) (CAS 110-71-4; EC No. 203-794-9)