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1417442-89-7

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1417442-89-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1417442-89-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,1,7,4,4 and 2 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1417442-89:
(9*1)+(8*4)+(7*1)+(6*7)+(5*4)+(4*4)+(3*2)+(2*8)+(1*9)=157
157 % 10 = 7
So 1417442-89-7 is a valid CAS Registry Number.

1417442-89-7Downstream Products

1417442-89-7Relevant articles and documents

Highly selective and sensitive fluorescent sensing of N-acetylcysteine: Effective discrimination of N-acetylcysteine from cysteine

Dong, Weihua,Wen, Hui,Yang, Xiao-Feng,Li, Hua

, p. 653 - 658 (2013)

A highly selective fluorescent probe for the effective discrimination of N-acetylcysteine (NAC) from cysteine (Cys) is proposed. Probe 1 contains an N,N-diethylrhodol (DER) dye and a dinitrophenyl ether moiety. Upon mixing with NAC in aqueous cetyltrimethylammonium bromide (CTAB) micellar solution, 1 was thiolyzed by NAC to release DER, thus affording a significant increase in fluorescence emission. Whereas for Cys, it gives only a dim response at the same reaction conditions. The significant difference in reaction rates can be explained via the fact that NAC shows more hydrophobicity than Cys, therefore the Meisenheimer complex intermediate (2a) of its nucleophilic aromatic substitution with 1 can embed in CTAB micelles effectively, which will facilitate the formation of 2a and hence affords an acceleration of reaction rates. The proposed method shows an excellent selectivity for NAC over Cys, homocysteine (Hcy) and other amino acids.

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