Table of Contents.Page[META TOLUENE SULPHONIC ACID and RELATED COMPOUNDS]1[THEORETICAL DISCUSSION]8[SULPHONATION OF ORTHO TOLUIDINE]12[SULPHONATION OF PARA TOLUIDINE]16[DIAZOTIZATION OF ORTHO TOLUIDINE SULPHONIC ACID.]21[PHYSICAL PROPERTIES OF THE DIAZO COMPOUND]23[DECOMPOSITION OF THE DIAZO COMPOUND]24[A STUDY OF THE SOLUTION OBTAINED BY THE DECOMPOSITION OF THE DIAZO COMPOUND]26[CONCLUSION]29[BIBLIOGRAPHY]30