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334678-81-8

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334678-81-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 334678-81-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,4,6,7 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 334678-81:
(8*3)+(7*3)+(6*4)+(5*6)+(4*7)+(3*8)+(2*8)+(1*1)=168
168 % 10 = 8
So 334678-81-8 is a valid CAS Registry Number.

334678-81-8Downstream Products

334678-81-8Relevant articles and documents

Synthesis and characterization of sulfonated and poly(ethylene glycol)-calix[4]arene tertiary phosphines

Shen, Jinyu,Roundhill, D. Max

, p. 33 - 42 (2000)

Sulfonation of triphenylphosphine with a 30% oleum solution gave phenyl-di-(3-sulfonatophenyl) phosphine. The structure was confirmed by a combination of 1H and 13C NMR spectroscopy. A pair of calix[4]arenes with a tertiary phosphine group on one rim and a methoxy ethylene glycol group on the other were prepared and characterized. One had the phosphine moiety on the narrow rim, and the other had the phosphine on the wide rim. Structural characterization was again by a combination of 1H and 13C NMR spectroscopy.

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