1637-31-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1637-31-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,3 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1637-31:
(6*1)+(5*6)+(4*3)+(3*7)+(2*3)+(1*1)=76
76 % 10 = 6
So 1637-31-6 is a valid CAS Registry Number.
1637-31-6Relevant articles and documents
INTEGRATED PROCESS FOR THE PRODUCTION OF Z-1,1,1,4,4,4-HEXAFLUORO-2-BUTENE
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Paragraph 0034; 0053; 0055, (2016/04/20)
The present invention provides an efficient and cost effect synthesis route from a specific starting material of 2,3-dichloro-1,3-butadiene to the desired product of Z-1,1,1,4,4,4-hexafluoro-2-butene.