89410-21-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89410-21-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,4,1 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 89410-21:
(7*8)+(6*9)+(5*4)+(4*1)+(3*0)+(2*2)+(1*1)=139
139 % 10 = 9
So 89410-21-9 is a valid CAS Registry Number.
89410-21-9Relevant articles and documents
Synthesis of 1-Acetyl-5-aryl-3--2-pyrazolines
Kumar, Ashok,Sinha, Jagdish N.,Bhargava, Krishna P.,Shanker, Kirpa
, p. 589 - 591 (2007/10/02)
Substituted-2'-(indol-3-yl-methyleneamino)chalkones (IIa), synthesized by the condensation of 2-(indol-3-yl-methyleneamino)acetophenone (Ia) with different aromatic aldehydes, undergo cyclisation with hydrazine hydrate in the presence of gl. acetic acid t