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143880-35-7

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143880-35-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143880-35-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,8,8 and 0 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 143880-35:
(8*1)+(7*4)+(6*3)+(5*8)+(4*8)+(3*0)+(2*3)+(1*5)=137
137 % 10 = 7
So 143880-35-7 is a valid CAS Registry Number.

143880-35-7Relevant articles and documents

Synthesis and reactions of 2-amino-4-aryl-5,6,7,8-tetrabromo-1(2H)-phthalazinone derivatives

Fikry, Reda M.,Yassin, Fathy A.,Mohamed, Enaiat K.

, p. 742 - 746 (2007/10/02)

2-Amino-4-aryl-5,6,7,8-tetrabromo-1(2H)-phthalazinones (3a-c) have been prepared via the interaction of benzoxazones (2a-c) with hydrazine hydrate in boiling pyridine.The reaction of 3a with carbon disulphide and hydrazine hydrate in the presence of liqui

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