902137-22-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 902137-22-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,2,1,3 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 902137-22:
(8*9)+(7*0)+(6*2)+(5*1)+(4*3)+(3*7)+(2*2)+(1*2)=128
128 % 10 = 8
So 902137-22-8 is a valid CAS Registry Number.
902137-22-8Relevant articles and documents
A 2-amino-5-substituted -1, 3, 4-oxadiazoles and its preparation method and application
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Paragraph 0069-0070, (2017/01/12)
The invention relates to 2-amido-5-substituted-1,3,4-oxadiazole as well as a preparation method and application thereof. The preparation method comprises the following steps: adding semicarbazone, manganese dioxide and pyridine into a reaction vessel, rea