3731-93-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3731-93-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,7,3 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3731-93:
(6*3)+(5*7)+(4*3)+(3*1)+(2*9)+(1*3)=89
89 % 10 = 9
So 3731-93-9 is a valid CAS Registry Number.
3731-93-9Relevant academic research and scientific papers
Epoxy type chain extender and preparation method thereof
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Paragraph 0111; 0115; 0116; 0118, (2018/09/21)
The invention provides an epoxy type chain extender and a preparation method thereof. A molecular chain of the chain extender contains a Schiff base structure (-CH=N-) and two ends of a molecule contain two or more than two epoxy groups. The chain extende
