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Propanedinitrile, [4-(diphenylmethylene)-2,5-cyclohexadien-1-ylidene]- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

21870-74-6

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21870-74-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21870-74-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,7 and 0 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21870-74:
(7*2)+(6*1)+(5*8)+(4*7)+(3*0)+(2*7)+(1*4)=106
106 % 10 = 6
So 21870-74-6 is a valid CAS Registry Number.

21870-74-6Upstream product

21870-74-6Downstream Products

21870-74-6Relevant articles and documents

Dicyanodiaryl-p-quinodimethanes : An efficient synthesis using a new dilithium reagent and their solvent-dependent properties

Kawase, Takeshi,Wakabayashi, Masaki,Takahashi, Chizuko,Oda, Masaji

, p. 1055 - 1056 (1997)

A series of 7,7-dicyano-8,8-diaryl-p-quinodimethane are readily prepared by the reaction of 4-lithiophenyldicyanomethyl-lithium with diaryl ketones; the 8-(4-dimethylaminophenyl) compounds thus obtained show solvent-dependent absorption spectra and bond rotation of the exocyclic double bonds and form a head-to-tail dimeric structure in the crystal.

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