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81541-85-7

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81541-85-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81541-85-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,4 and 1 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81541-85:
(7*8)+(6*1)+(5*5)+(4*4)+(3*1)+(2*8)+(1*5)=127
127 % 10 = 7
So 81541-85-7 is a valid CAS Registry Number.

81541-85-7Downstream Products

81541-85-7Relevant articles and documents

On the Reaction of 5-Aminopyrimidine with Diazonium Salts (1,2)

Swistun, Zofia,Plas, Henk C. van der

, p. 1639 - 1641 (2007/10/02)

The reaction of 5-aminopyrimidine with benzenediazonium chloride, p-methylbenzenediazonium chloride and p-bromobenzenediazonium chloride, is described.The reaction leads to a mixture of compounds, i.e. 1-aryl-3-(pyrimidin-5-yl)triazene (6), 5-amino-4-aryl-6-arylazopyrimidine (7) and 4-aryl-6-arylazo-5-hydroxypyrimidine (8).The yields are found to be strongly dependent on the substituents present in the diazonium salt.Attempts to rearrange 1-(p-bromophenyl)-3-(pyrimidin-5-yl)triazene (6c) under basic and acidic conditions into a 1,2,3-triazole derivative failed.

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