new specific reagent

hydroxylamine hydrochlorde-Ni￣(2+)

was proposed for the spec-trophotornetric determination of molotilate(diisopropyl 1

3-dithiol-2-ylidene malonate). Maloti-late

in the presence of sodium hydroxide

reacts with hydroxylamine hydrochloride and Ni￣(2+) toform stable brown coordination compounds

in which the ratios of the correspollding hydroxamicacid vs Ni￣(2+) were predominately1:1.Malotilate could be determined spectrophotometrically at 484nm

and the molar absorptivity was 900L·mol￣(-1)·cm￣(-1) The coefficient of variation for thedetermination of malotilate preparation wa8 1.5%(n=10).The meanrecovery for the determinationof maltilate preparation wa8 97.5%(n=10)

the coeffcient of variation was 1.8%(n=10).