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257932-05-1

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257932-05-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 257932-05-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,9,3 and 2 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 257932-05:
(8*2)+(7*5)+(6*7)+(5*9)+(4*3)+(3*2)+(2*0)+(1*5)=161
161 % 10 = 1
So 257932-05-1 is a valid CAS Registry Number.

257932-05-1Relevant articles and documents

Regioselective nitration of anilines with Fe(NO3)3·9H2O as a promoter and a nitro source

Gao, Yang,Mao, Yuanyou,Zhang, Biwei,Zhan, Yingying,Huo, Yanping

, p. 3881 - 3884 (2018/06/08)

An efficient Fe(NO3)3·9H2O promoted ortho-nitration reaction of aniline derivatives has been developed. This reaction may go through a nitrogen dioxide radical (NO2) intermediate, which is generated by the thermal decomposition of iron(iii) nitrate. The practicality of the present method using nontoxic and inexpensive iron reagents has been shown by the broad substrate scope and applications.

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