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169777-04-2

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169777-04-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169777-04-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,7,7 and 7 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 169777-04:
(8*1)+(7*6)+(6*9)+(5*7)+(4*7)+(3*7)+(2*0)+(1*4)=192
192 % 10 = 2
So 169777-04-2 is a valid CAS Registry Number.

169777-04-2Relevant articles and documents

Penultimate effects in the copolymerization of maleic anhydride with electron-rich styrene derivatives

ten Brummelhuis, Niels,Stutz, Marvin Bj?rn

, p. 2932 - 2939 (2016)

The (controlled) free-radical copolymerization of maleic anhydride and styrene or derivatives thereof is often thought to provide nearly perfect alternating copolymers. Here, the RAFT copolymerization of electron-rich styrene derivatives with maleic anhydride is reported. This copolymerization shows distinct penultimate effects, resulting in polymers with increased incorporation of styrene monomers, that is, where a tendency toward periodic (S-S-MA) copolymers exists. This work could be a first step towards periodic copolymers based on maleic anhydride and styrene derivatives.

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