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1523-21-3

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1523-21-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1523-21-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,5,2 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1523-21:
(6*1)+(5*5)+(4*2)+(3*3)+(2*2)+(1*1)=53
53 % 10 = 3
So 1523-21-3 is a valid CAS Registry Number.

1523-21-3Relevant articles and documents

Alkaline Hydrolysis of 4-Nitrophenyl X-Substituted-Benzoates Revisited: New Insights from Yukawa–Tsuno Equation

Shin, Young-Hee,Kang, Ji-Sun,Um, Ik-Hwan

, p. 2062 - 2065 (2016)

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MOLECULAR TETRAHEDRON NANOCAGE, ITS PREPARATION, AND USES THEREOF

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Paragraph 0175, (2021/12/15)

The present application is directed to a nanocage of Formula (I): wherein A and R are as described herein. The present application is also directed to a process for preparation of a nanocage of Formula (I). Methods of utilizing the nanocage for detecting an analyte in a fluid and for functionalizing a polymer are also described.

Evidence for a catalytic six-membered cyclic transition state in aminolysis of 4-nitrophenyl 3,5-dinitrobenzoate in acetonitrile: Comparative Br?nsted-type plot, entropy of activation, and deuterium kinetic isotope effects

Um, Ik-Hwan,Kim, Min-Young,Bae, Ae-Ri,Dust, Julian M.,Buncel, Erwin

, p. 217 - 222 (2017/03/06)

A kinetic study for reactions of 4-nitrophenyl 3,5-dinitrobenzoate (1a) with a series of cyclic secondary amines in acetonitrile is reported. Plots of the pseudo-firstorder rate constant (kobsd) vs [amine] curve upward, while those of kobs

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