118971-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 118971-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,9,7 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 118971-20:
(8*1)+(7*1)+(6*8)+(5*9)+(4*7)+(3*1)+(2*2)+(1*0)=143
143 % 10 = 3
So 118971-20-3 is a valid CAS Registry Number.
118971-20-3Relevant articles and documents
Condensed 1,2,4-Triazines. Synthesis and Reactions of Some Condensed Benzoas-triazines
Eid, Mohga M.,Mansour, A. K.
, p. 1139 - 1141 (2007/10/02)
2-o-Chlorophenyl-2H-naphthov-triazole-4,5-quinone condenses with semicarbazide and some of its derivatives at the 4 position and the products cyclize into the corresponding 1,2,4-triazines.Reactions of these triazines with some reagents are describ