Detail of "553-53-7"

Reference

Discoloration-resistant urethane rubber compounds

Discoloration-resistant urethane rubber compounds. Hinoue, Kenichi; Ichikawa, Kiyoshi; Kondo, Kunio; Inaba, Yasunobu; Miyake, Akihiro; Notsu, Yoshimasa (Asahi Chemical Industry Co., Ltd., Japan). Japan. Kokai JP 52015548 5 Feb 1977 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF.Several substances like 16890-86-1 may be metioned in this study. CLASS: IC: C08L075-04. APPLICATION: JP 75-91055 28 Jul 1975. DOCUMENT TYPE: Patent CA Section: 38 (Elastomers, Including Natural Rubber) Reaction products of acid hydrazides, dicarboxylic acid esters, acyl chlorides(optional), and dihydrazides are useful as discoloration preventers for urethane rubber. Thus, 100 parts of a copolymer (I) derived from polytetramethylene glycol (mol. wt. 1200) 100, diphenylmethane 4,4'-diisocyanate 31.2, ethylenediamine 2.4, and Et2NH 0.3 part and 3 parts of a reaction product from di-Me adipate [627-93-0] 0.1, nicotinic acid hydrazide [553-53-7] 0.01, 1,2-bis(hydrazinocarbonyl)hydrazine [1617-13-6] 0.1, and stearoyl chloride [112-76-5] 0.01 mol were dissolved in DMF to 25% solids, cast on a glass plate, and dried at 80° and 2 mm to give a film having tensile strength retention and discoloration-resistance rating after 40 h of irradn. in a fadeometer 90.3% and 5 (best rating), resp., and discoloration-resistance rating after N oxide test (AATCC 23-1962) 4, compared with 40.3, 1, and 1, resp., for I alone. .

Titrimetric method for the determination of nicotinoylhydrazine with vanadium(V)

Titrimetric method for the determination of nicotinoylhydrazine with vanadium(V). Rambabu, C.; Rao, R. Sambasiva; Rao, P. V. Krishna (Dep. Chem., Andhra Univ., Waltair 530 003, India). Curr. Sci., 53(10), 527-8 (English) 1984. CODEN: CUSCAM. ISSN: 0011-3891. DOCUMENT TYPE: Journal CA Section: 64 (Pharmaceutical Analysis) Nicotinoylhydrazone (I) [553-53-7] was detd. by adding 1-16 mL H3PO4 and 0.2 mL 0.1% OsO4 (stabilizer) to an aliquot (1-10 mL 0.025M) of I, dilg. to 50 mL, and warming to 240-50°.0 mL. Two drops of indicator soln. were added, and the mixt. was titrated rapidly with V(V) soln. until the appearance of a permanent blue-violet color with Ba diphenylaminesulfonate indicator or a permanent blue color with Ph2NH indicator. Potentiometric titrn. could be used also. The relative error was 0.35-0.40%.