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261789-05-3

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261789-05-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 261789-05-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,1,7,8 and 9 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 261789-05:
(8*2)+(7*6)+(6*1)+(5*7)+(4*8)+(3*9)+(2*0)+(1*5)=163
163 % 10 = 3
So 261789-05-3 is a valid CAS Registry Number.

261789-05-3Relevant articles and documents

Fe molecular fluorescence testing agent and preparation method thereof

-

, (2018/11/03)

The invention provides a Fe molecular fluorescence testing agent and a preparation method thereof. The Fe molecular fluorescence testing agent has a structure represented by a formula (I). Theprovided Fe molecular fluorescence testing agent ta

Preparation method of Na molecular fluorescent intermediate and preparation method of Na molecular fluorescent sensor

-

, (2019/01/04)

The invention provides a preparation method of a Na molecular fluorescent intermediate and a preparation method of a Na molecular fluorescent sensor. The Na molecular fluorescent intermediatehas a structure as shown in a formula I. The preparation method of the Na molecular fluorescent intermediate comprises the following steps: S1, carrying out a substitution reaction on o-anisidineand alpha-methyl haloacetate to obtain a compound 2; S2, carrying out a reduction reaction on the compound 2 to obtain a compound 3; S3, carrying out a hydroxyl substitution on the compound 4 by adopting toluene sulfonyl chloride to obtain a compound 5, wherein the compound 4 has a structural formula as the follows; S4, carrying out a cyclization reaction on the compound 3 and the compound 5 to obtain a compound 6; S5, carrying out a formylation reaction on the compound 6 to obtain a compound 7; S6, carrying out a henry reaction on the compound 7 with nitromethane to obtain a compound 8; and S7, carrying out nitroso reduction reaction on the compound 8 to obtain the Na molecular fluorescent intermediate. The method is beneficial to improving the yield of the Na molecular fluorescentintermediate.

A fluorescent chemosensor for sodium based on photoinduced electron transfer

He, Huarui,Mortellaro, Mark A.,Leiner, Marc J. P.,Young, Susanne T.,Fraatz, Robert J.,Tusa, James K.

, p. 549 - 555 (2007/10/03)

A new optical sensor suitable for practical measurement of sodium in serum and whole blood samples is described. The optical sensor is based on a novel PET (photoinduced eletron transfer) fluoroionophore immobilized in a hydrophilic polymer layer. The des

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