51821-19-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51821-19-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,8,2 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 51821-19:
(7*5)+(6*1)+(5*8)+(4*2)+(3*1)+(2*1)+(1*9)=103
103 % 10 = 3
So 51821-19-3 is a valid CAS Registry Number.
51821-19-3Relevant articles and documents
Synthesis of a new carbazole cyclic dimer via Knoevenagel condensation
Zhang, Yadong,Wada, Tatsuo,Sasabe, Hiroyuki
, p. 5909 - 5912 (1996)
The synthesis of a carbazole cyclic dimer and a main-chain polymer is reported. Knoevenagal condensation of 3,6-diformyl-9-heptylcarbazole and 1,4-bis(cyanoacetoxymethyl)-benzene using 4-(N,N-dimethylamino)pyridine as a base could yield a carbazole cyclic
