(2)Only the following substances or agents may, as specified in these rules, be used as denaturants :(i)"Caoutchoucine" which is made by the slow dry distillation of waste vulcanised rubber, and "light caoutchoucine" made by the redistillation of this liquid which process has the effect of removing certain smoke-causing and otherwise objectionable ingredients and by collecting that portion of the redistilled liquid which passes over at or below the temperature of about 200 degrees Centigrade;(ii)"Pyridine bases" which are made chiefly from the distillation of Coalter or shale and are mixtures of Pyridine with closely allied compounds boiling at various temperatures and must be of guaranteed mineral origin;(iii)Pyridine proper is a single definite compound C5 : H5 : N boiling at 100 degrees Centigrade and the use of Pyridine from animal sources is strictly prohibited in denaturation of spirit ;(iv)"Woodnaptha" or "Mineral naptha" which means inflammable oil distilled from coal, etc.;(v)"Special denaturants" are as mentioned in the formulae for denaturing alcohol prepared by the Standing Technical Committee in the Development Wing of the Ministry of Commerce and Industry, Ministry of Finance (Department of Revenue), Government of India ;(vi)Special denaturants are used in certain industries where the general denaturants are unsuitable for use and the use of special denaturants may be permitted under special sanction of the Board in consideration of each case according to specific requirements and subject to general regulations intended to safeguard the interest of revenue in the matter;(vii)Each denaturant shall be submitted for test by the Chemical Examiner for the purpose of analysing its chemical compounds and to ascertain and report whether it is fit for being used as a denaturant.
