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626254-03-3

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626254-03-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 626254-03-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,2,6,2,5 and 4 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 626254-03:
(8*6)+(7*2)+(6*6)+(5*2)+(4*5)+(3*4)+(2*0)+(1*3)=143
143 % 10 = 3
So 626254-03-3 is a valid CAS Registry Number.

626254-03-3Relevant articles and documents

Synthesis of N3S, N3O, N2S2, N2O2, N2SO and N2OS porphyrins with one meso-unsubstituted carbon

Punidha, Sokkalingam,Agarwal, Neeraj,Burai, Ritwik,Ravikanth, Mangalampalli

, p. 2223 - 2230 (2004)

A simple straightforward synthesis of N3S, N2S 2, N2O2, N2SO and N2OS porphyrins and an improved method for the synthesis of an N3O porphyrin with one meso-unsubstituted carbon atom are reported from readily available precursors. The reactivity of the meso-unsubstituted carbon atom was demonstrated by carrying out bromination followed by Heck coupling reactions. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.

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