1. Composition and stability of thorium(IV)-1-(o-arsonophenylazo)-2-naphthol-3,6-disulphonate (thoron) chelate;Sangal;J. Ind. Chem. Soc,1963
2. The 1:2 lanthanum-thoron chelate;Sangal;Z. Anorg. Chem,1963
3. Sangal, S. P., and Dey, A. K., Studies on some soluble palladium (II) chelate in aqueous solution. Part III. Reddish violet chelate of palladium (II) with sodium 1-(o-arsonophenylazo)-2-naphthol-3,6-disulphonate. J. Ind. Chem. Soc. (Communicated).
4. Spectrophotometric study on the chelate formation between uranium(VI) and 1-(o-arsonophenylazo)-2-naphthol-3,6-disulphonate (thoron) in aqueous solution;Sangal;J. Prakt. Chem,1963
5. Sangal, S. P., and Dey, A. K., Spectrophotometric determination of lanthanum (III) using sodium 1-(o-arsonophenylazo)-2-naphthol-3,6-disulphonate (thoron) as a chromogenic reagent. Chim. Anal. (In press).