128942-42-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128942-42-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,4 and 2 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 128942-42:
(8*1)+(7*2)+(6*8)+(5*9)+(4*4)+(3*2)+(2*4)+(1*2)=147
147 % 10 = 7
So 128942-42-7 is a valid CAS Registry Number.
128942-42-7Relevant articles and documents
Synthesis of Benzopyran Derivatives, XIV. New Procedure for the Preparation of 2,2-Dimethyl-2H-chromenes
Levai, Albert,Timar, Tibor
, p. 641 - 648 (2007/10/02)
2,2-Dimethyl-4-methoxychromans (1-12) have been converted into 2,2-dimethyl-2H-chromenes (13-24) in acidic media.
