190728-72-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 190728-72-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,0,7,2 and 8 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 190728-72:
(8*1)+(7*9)+(6*0)+(5*7)+(4*2)+(3*8)+(2*7)+(1*2)=154
154 % 10 = 4
So 190728-72-4 is a valid CAS Registry Number.
190728-72-4Relevant articles and documents
An efficient synthesis of dimethylmaleic anhydride
Mangaleswaran, Sivaprakasam,Argade, Narshinha P.
, p. 865 - 868 (2002)
A facile three-step synthesis of dimethylmaleic anhydride (8) with 74% overall yield has been described starting from maleimide 1, via methylmaleimide 4, using two Wittig reactions followed by an alkaline hydrolysis.
