190138-15-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 190138-15-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,0,1,3 and 8 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 190138-15:
(8*1)+(7*9)+(6*0)+(5*1)+(4*3)+(3*8)+(2*1)+(1*5)=119
119 % 10 = 9
So 190138-15-9 is a valid CAS Registry Number.
190138-15-9Relevant articles and documents
Polyazacalix[5]arenes - Synthesis and NMR Investigations
Graubaum,Lutze,Costisella
, p. 266 - 271 (2007/10/03)
The polyazacalix[5]arenes 5a-f were easily prepared by cyclisation of cyanuric chloride derivatives 3a-d und 4a-b. These macrocycles contain two phenylene and three 1,3,5-triazine units. The derivatisation of reactive chlorine-containing macrocycles 5 wit