33251-22-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33251-22-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,2,5 and 1 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 33251-22:
(7*3)+(6*3)+(5*2)+(4*5)+(3*1)+(2*2)+(1*2)=78
78 % 10 = 8
So 33251-22-8 is a valid CAS Registry Number.
33251-22-8Relevant articles and documents
1,4-Benzoquinones: Improved Methods of Synthesis and New Diaziridinyl Analogues
Dzielendziak, Adam,Butler, John
, p. 643 - 645 (2007/10/02)
Two methods are given for the synthesis of 2,5-dichloro-3,6-bis(alkoxycarbonylamino)-1,4-benzoquinones 4, which can be subsequently reacted with aziridine to produce novel 2,5-di(1-aziridinyl)-3,6-bis(alkoxycarbonylamino)-1,4-benzoquinones 5.The first met