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4997-50-6

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4997-50-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4997-50-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,9,9 and 7 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4997-50:
(6*4)+(5*9)+(4*9)+(3*7)+(2*5)+(1*0)=136
136 % 10 = 6
So 4997-50-6 is a valid CAS Registry Number.

4997-50-6Relevant articles and documents

Penultimate effect in ethylene-styrene copolymerization and the discovery of highly active ethylene-styrene catalysts with increased styrene reactivity

Arriola, Daniel J.,Bokota, Marilyn,Campbell Jr., Richard E.,Klosin, Jerzy,LaPointe, Robert E.,Redwine, O. David,Shankar, Ravi B.,Timmers, Francis J.,Abboud, Khalil A.

, p. 7065 - 7076 (2008/02/08)

For the first time commercially relevant catalysts for the copolymerization of ethylene and styrene have been identified. The catalysts maintain very high copolymer efficiencies at relatively high reactor temperatures without sacrificing styrene comonomer

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