7526-21-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7526-21-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,2 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7526-21:
(6*7)+(5*5)+(4*2)+(3*6)+(2*2)+(1*1)=98
98 % 10 = 8
So 7526-21-8 is a valid CAS Registry Number.
InChI:InChI=1/C2H6N4O.NO3/c3-1(4)6-2(5)7;2-1(3)4/h(H6,3,4,5,6,7);/q;-1/p+1
7526-21-8Relevant articles and documents
A new procedure to obtain ?-caprolactam catalyzed by a guanidinium salt
Fernández-Stefanuto,Verdía,Tojo
supporting information, p. 12830 - 12834 (2017/11/06)
A new procedure to prepare ?-caprolactam by the Beckmann rearrangement of cyclohexanone oxime is described. Treatment of the oxime with the novel salt cyanoguanidinium tosylate affords ?-caprolactam without the need of any other promoter.