Making the world better, one answer at a time. As the name implies a VOC is a Volitile organic compound. An SVOC is a Semi volitile organic compound. Therefore an SVOC is not as volitile as a VOC.This is an example from the EPA website.aking the world better, one answer at a time. As the name implies a VOC is a Volitile organic compound. An SVOC is a Semi volitile organic compound. Therefore an SVOC is not as volitile as a VOC.