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21715-13-9

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21715-13-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21715-13-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,1 and 5 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21715-13:
(7*2)+(6*1)+(5*7)+(4*1)+(3*5)+(2*1)+(1*3)=79
79 % 10 = 9
So 21715-13-9 is a valid CAS Registry Number.

21715-13-9Relevant articles and documents

Heat Resistance and Electrophysical Characteristics of Polyheteroarylenes and Ferroelectric–Polymer Film Composites Based on Them

Bol’shakov, M. N.,Chigirev, D. A.,Lebedeva, G. K.,Marfichev, A. Yu.,Rudaya, L. I.,Shagaiko, Yu. V.,Sokolova, I. M.

, p. 188 - 196 (2020)

Abstract: Structurally related poly(amido-o-hydroxy amides) derived from 5,5-methylenebis(2-aminophenol) with tetramethylsiloxane and heteroaromatic (benzoxazole and benzotriazole) fragments incorporated in the second amine component or formed by polyheterocyclization of the corresponding prepolymers were prepared. The effect of modifying fragments introduced into the base poly(o-hydroxy amide) on the heat resistance of powders and films and of films of photosensitive compounds based on the synthesized polymers with the naphthoquinone diazide component was analyzed. The electrophysical parameters of the polymer films and film composites with a nanodispersed ferroelectric filler, (PZT: ceramic powder with the composition Pb0.81Sr0.04Na0.075Bi0.075(Zr0.58 Ti0.42)O3, Russian brand PZT-1), prepared on the basis of modified polymer binders, were determined. Introduction of 20 mol % sulfur-containing fragments into the polymer binder ensures a 50–65?C increase in the heat resistance for all types of films without increasing the level of the dielectric loss for the composite coatings.

New schiff bases derived from 2,5-dihydroxybenzaldehyde and amino-substituted 2-phenyl-1,3-benzothiazoles. Mesogenic monomers for liquid crystalline polyethers

Chernienko,Nikiforova,Rudaya,Ramsh,Shamanin

experimental part, p. 1604 - 1605 (2012/03/08)

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