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117139-08-9

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117139-08-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117139-08-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,1,3 and 9 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 117139-08:
(8*1)+(7*1)+(6*7)+(5*1)+(4*3)+(3*9)+(2*0)+(1*8)=109
109 % 10 = 9
So 117139-08-9 is a valid CAS Registry Number.

117139-08-9Downstream Products

117139-08-9Relevant articles and documents

A New Synthesis of 3-Chlorocoumarins and Synthesis of Isocoumestan

Borse, Arvind P.,Kelkar, Shriniwas L.,Wadia, Murban S.

, p. 1180 - 1181 (2007/10/02)

The preformed complex of POCl3 and N,N-diethylchloroacetamide (1) on reaction with substituted salicylaldehydes (2a-e) yields 3-chlorocoumarins (4a-c) while with o-hydroxybenzophenones (5a-c) the products obtained have been characterised as 3-chloro-4-arylcoumarins (6a-c). 3-Chloro-4-(2'-hydroxyphenyl)coumarin (6d) on treatment with aq.KOH yields isocoumestan (7).

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