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20640-68-0

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20640-68-0 Usage

Uses

2-(Acetylamino)-3-(phenylthio)propanoic Acid can be used as BTEX metabolites derivation kit.

Check Digit Verification of cas no

The CAS Registry Mumber 20640-68-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,4 and 0 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 20640-68:
(7*2)+(6*0)+(5*6)+(4*4)+(3*0)+(2*6)+(1*8)=80
80 % 10 = 0
So 20640-68-0 is a valid CAS Registry Number.

20640-68-0 Well-known Company Product Price

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  • TCI America

  • (P0607)  DL-Phenylmercapturic Acid  >98.0%(HPLC)(T)

  • 20640-68-0

  • 5g

  • 3,370.00CNY

  • Detail

20640-68-0Relevant academic research and scientific papers

Development of a class-selective enzyme-linked immunosorbent assay for mercapturic acids in human urine

Lohse, Christian,Jaeger, Lynn L.,Staimer, Norbert,Sanborn, Jim R.,Daniel Jones,Lango, Jozsef,Gee, Shirley J.,Hammock, Bruce D.

, p. 5913 - 5923 (2000)

Epidemiological and toxicological studies often require the analysis of large numbers of samples for biological markers of exposure. The goal of this work was to develop a class-selective ELISA to detect groups of structurally closely related mercapturic acids with small nonpolar S-substituents. An assay was developed with strong recognition for mercapturates including S-benzylmercapturic acid (IC50 = 0.018 μmol/L), S-n-hexylmercapturic acid (IC50 = 0.021 μmol/L), S-phenylmercapturic acid (IC50 = 0.024 μmol/L), and S-cyclohexylmethylmercapturic acid (IC50 = 0.042 μmol/L). The same assay also showed weaker recognition for S-(1-hydroxynaphthal-2-yl)mercapturic acid and S-allylmercapturic acid (IC50 = 1.1 and 1.7 μmol/L, respectively). Subtle modifications to the hapten linker structure of the coating antigen proved to have a strong impact on the selectivity and the specificity of the assay. A slightly modified assay showed high recognition for S-benzylmercapturic acid (IC50 = 0.018 μmol/L) and weaker recognition for seven other mercapturic acids (IC50 = 0.021-10 μmol/L). Strong positive assay responses were detected in 12 urine samples obtained from persons with no known occupational exposure to exogenous electrophilic xenobiotics. Solid phase extraction and cross-reactivity indicated that the presumptive immunoreactive materials were similar in size and polarity to S-benzylmercapturic acid. The assay was more selective to mercapturic acids than the spectrophotometric thioether assay.

Formation of β-lactams from 3-phenylthiopropionamide derivatives. A possible model for penicillin biosynthesis

Beckwith,Easton

, p. 3995 - 4001 (2007/10/02)

The Cu-catalysed reaction of the substituted 3-phenylthiopropianamide with di-t-butyl peroxide gives the β-lactam via oxidative cyclisation of the α-thioalkyl radical. Similar reactions of the propionamides with t-butyl perbenzoate give benzoates which can be readily converted into the β-lactams, but neither β-lactams nor benzoates can be obtained from the thiazepines. Dimethyl disulfide is benzoyloxylated on treatment with t-butyl perbenzoate. The relevance of these results to penicillin biosynthesis is discussed.

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