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SANTOLUBE? OS-138 is a polyphenyl ether with exceptionally low volatility and

resistance to degradation from heat, oxygen, radiation, and chemical attack. It is

therefore well-suited for designing lubricants for applications that experience extreme

temperatures and other adverse environments. In addition, SANTOLUBE? OS-138 is

compatible with most metals, plastics, and elastomers and is essentially nontoxic,

especially when proper hygienic practices are employed.