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119457-70-4

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119457-70-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 119457-70-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,9,4,5 and 7 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 119457-70:
(8*1)+(7*1)+(6*9)+(5*4)+(4*5)+(3*7)+(2*7)+(1*0)=144
144 % 10 = 4
So 119457-70-4 is a valid CAS Registry Number.

119457-70-4Relevant articles and documents

SYNTHESIS AND ISOMERIZATION OF 2,5- AND 2,6-SUBSTITUTED F-HEXADIENES AND HEPTADIENES

Burton, Donald J.,Tsao, Hsiang-Wei

, p. 183 - 200 (1988)

The reaction of 2,2,3,3,4,4-hexafluoro-1,5-diphenylpentane-1,5-dione, 4,4,5,5-tetrafluorooctane-3,6-dione and 4,4,5,5,6,6-hexafluorononane-3,7-dione with excess triphenylphosphine and dibromodifluoromethane in triglyme at 70 deg C gave modest yields (50-60 percent) of the corresponding dienes and enones (10-20 percent).No isomerized olefins were observed.Subsequent treatment of the dienes with tetraethylammonium fluoride gave the internal olefins, and thermal isomerization of 2,6-diphenyl-1,1,3,3,4,4,5,5,7,7-decafluoro-1,6-heptadiene to the internal isomeric olefins was observed at 250 deg C.

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