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17816-43-2

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17816-43-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 17816-43-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,8,1 and 6 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 17816-43:
(7*1)+(6*7)+(5*8)+(4*1)+(3*6)+(2*4)+(1*3)=122
122 % 10 = 2
So 17816-43-2 is a valid CAS Registry Number.

17816-43-2Relevant articles and documents

Condensation reactions of benzils with ureas in ethylene glycol

Lee, Chang Kiu,Kim, Sun Hee,Kim, Yong Bun

, p. 1019 - 1024 (1996)

Reactions of benzils and urea in ethylene glycol at 180° for 1-2 hours gave 2,4,5-triaryloxazoles as major products and bicyclic imidazoimidazole-2,5-diones as minor products. N-Methylurea and W-phenylurea gave the oxazoles under similar conditions. The solvent seemed to assist the formation of oxazole by eliminating the isocyanate components as ethylene glycol biscarbamates.

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