A phosphazene composition which has a content of volatile components of
not less than 0.02% by weight and not more than 1.0% by weight when it is
heated at 200.degree. C. for 2 hours; is excellent in resistance to
hydrolysis, and when the phosphazene composition is added to a resin,
there is provided a resin composition which highly maintains the balance
of resistance to hydrolysis, flame retardancy and stability of electric
characteristics in a high-frequency field of not less than 1 GHz.