A STUDY ON AGE CHANGE OF FORMOCRESOL : I. Age Change of Formocresol Mixture maintained in Glass Ampoule

Abstract

A modification has been developed in this laboratory for the determination of formaldehyde by the usual chromotropic acid method for the purpose of estimating formaldehyde content in the mixture of cresol and formaldehyde. Using the modified method, possible age change of formaldehyde content in F. C. mixture was studied when it was left standing in the dark under the constant temperatures of both 5℃ and 37℃ for the period of 70 days. The mixture was kept sealed in glass ampoules. The content of formaldehyde at the start and the end of the experiment was compared, and it was proved that there was hardly any change to be noticed.