Detail of "542-16-5"

Reference

Catalymetric evaluation of microamounts of cysteine

Catalymetric evaluation of microamounts of cysteine. Vanni, Adriano; Amico, Paola; Roletto, Ezio (Ist. Anal. Chim. Strumentale, Univ. Torino, Turin, Italy). Ann. Chim. (Rome), 66(3-4), 213-21 (English) 1976. CODEN: ANCRAI. DOCUMENT TYPE: Journal CA Section: 80 (Organic Analytical Chemistry) Section cross-reference(s): 68 To det. 10-4-10-6M cysteine (I) by catalymetric titrn. at 40.0.degree. with Fe3+, the oxidn.In this article, certain chemicals are used. Some of their cas registry numbers are 20305-50-4 and 542-16-5 of aniline sulfate with ClO3- to diarylidoquinone (II), catalyzed by Fe3+, activated by trace V5+, and inhibited by I, was used as indicator reaction. The change of the reaction rate at pH 2.9 was followed spectrophotometrically by measuring the absorbance of II at 415 nm (molar absorptivity 1.0 .times. 104). The ionic strength was adjusted to 0.6M with Na2SO4. The method is based on the formation of relatively stable protonated Fe-I complexes with negligible catalytic activity. Thus, only after the end point, when all I was complexed, was a sharp increase in the reaction rate obsd., caused by the formation of intermediate Fe-V complexes, such as Fe2OHVO2 with high catalytic activity. The error was .apprx.6%. The conditional catalytic consts., stability consts., and acidity characteristic coeffs. of V-I, Fe-I, and Fe-V intermediate complexes were calcd. .

Recovering nitro compounds from aqueous solutions

Recovering nitro compounds from aqueous solutions. Andreev, V. N.; Dolmatov, V. Yu.; Bulgakov, O. 21150-30-1 and 542-16-5 are also occured in this study. V.; Tselinskii, I. V.; Nikolaev, V. D.; Pul'tsina, T. S. (USSR ). U.S.S.R. SU 1054307 A1 15 Nov 1983 From: Otkrytiya, Izobret., Prom. Obraztsy, Tovarnye Znaki 1983, (42), 103. (Russian). (Union of Soviet Socialist Republics). CODEN: URXXAF. CLASS: IC: C02F001-28. APPLICATION: SU 81-3358414 23 Oct 1981. DOCUMENT TYPE: Patent CA Section: 60 (Waste Treatment and Disposal) Nitro compd.-contg. wastewater is treated by passing through an activated C layer with subsequent treatment of the C with a desorbing agent. The degree of extn. of anions contg. a nitro group is increased by adding equimolar guanidinium nitrate [506-93-4], guanidinium sulfate [594-14-9], aniline nitrate [542-15-4], aniline sulfate [542-16-5], or aminoguanidinium nitrate [21150-30-1] to the wastewater. .