13229-91-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 13229-91-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,2,2 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 13229-91:
(7*1)+(6*3)+(5*2)+(4*2)+(3*9)+(2*9)+(1*1)=89
89 % 10 = 9
So 13229-91-9 is a valid CAS Registry Number.
13229-91-9Relevant articles and documents
Solvent-free coumarin synthesis
Sugino, Teizo,Tanaka, Koichi
, p. 110 - 111 (2001)
The synthesis of coumarins via Pechmann and Knoevenagel condensation reactions under solvent-free conditions is reported, in which waste minimization, simple operation and easier product work-up can be achieved.