Furthermore , Philippe de Clermont has never been reported ill by his family up to his passing at the age of 90 .
Even though TEPP has repeatedly been synthesized by other chemists during the years that followed , not until the 1930s had any adverse effects been observed .
Philippe de Clermont has never been reported ill by his family up to his passing at the age of 90 .
Even though TEPP has repeatedly been synthesized by other chemists during the years that followed , not until the 1930s had any adverse effects been observed .