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56990-05-7

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56990-05-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56990-05-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,9,9 and 0 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 56990-05:
(7*5)+(6*6)+(5*9)+(4*9)+(3*0)+(2*0)+(1*5)=157
157 % 10 = 7
So 56990-05-7 is a valid CAS Registry Number.

56990-05-7Relevant articles and documents

Reexamination of the bromination of 2-nitrobenzaldehyde with NBS or NaBr-NaIO4 in sulfuric acid

Cummings, Matthew M.,Soederberg, Bjoern C. G.

supporting information, p. 954 - 958 (2014/03/21)

Two literature procedures for selective bromination of 2-nitrobenzaldehyde using N-bromosuccinimide (NBS) or NaBr-NaIO4 in sulfuric acid were examined. In contrast to the reports that 4-bromo-2-nitrobenzaldehyde is formed as a single product in good yield, reactions using NBS gave a number of isomeric mono- and dibrominated products identified by spectroscopical methods and by sodium borohydride reduction to the corresponding benzyl alcohol, and reactions using NaBr-NaIO4 did not furnish any product. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications for the following free supplemental resource(s): Full experimental and spectral details.]

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