1214989-91-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1214989-91-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,4,9,8 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1214989-91:
(9*1)+(8*2)+(7*1)+(6*4)+(5*9)+(4*8)+(3*9)+(2*9)+(1*1)=179
179 % 10 = 9
So 1214989-91-9 is a valid CAS Registry Number.
1214989-91-9Relevant academic research and scientific papers
Condensation of hydroxy naphthazarins with aromatic aldehydes
Pelageev,Anufriev
experimental part, p. 2335 - 2339 (2010/02/16)
Hydroxy naphthazarins (2,5,8-trihydroxy-1,4-naphthoquinones) react with aromatic aldehydes containing no hydroxy groups at position 2 under mild acid catalysis to form 3,3'-(arylmethylene)bisnaphthazarins. On the example of o-vanillin, it was shown that t
