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621-25-0

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621-25-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 621-25-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,2 and 1 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 621-25:
(5*6)+(4*2)+(3*1)+(2*2)+(1*5)=50
50 % 10 = 0
So 621-25-0 is a valid CAS Registry Number.

621-25-0Relevant articles and documents

Visible-light-promoted oxidative dehydrogenation of hydrazobenzenes and transfer hydrogenation of azobenzenes

Wang, Xianya,Wang, Xianjin,Xia, Chungu,Wu, Lipeng

, p. 4189 - 4193 (2019)

Azo compounds are widely used in the pharmaceutical and chemical industries. Here, we report the use of a non-metal photo-redox catalyst, Eosin Y, to synthesize azo compounds from hydrazine derivatives. The use of visible-light with air as the oxidant makes this process sustainable and practical. Moreover, the visible-light-driven, photo-redox-catalyzed transfer hydrogenation of azobenzenes is compatible with a series of hydrogen donors such as phenyl hydrazine and cyclic amines. Compared with traditional (thermal/transition-metal) methods, our process avoids the issue of over-reduction to aniline, which extends the applicability of photo-redox catalysis and confirms it as a useful tool for synthetic organic chemistry.

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