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Ethyl p-nitrobenzenethiosulfonate, also known as EPNBS, is a chemical compound with the molecular formula C8H8N2O4S2. It is a yellow crystalline solid that is soluble in organic solvents such as ethanol and acetone. EPNBS is commonly used as a reagent in the determination of thiol groups, particularly in the quantification of free thiols in proteins and other biomolecules. The compound reacts with thiols to form a disulfide bond, resulting in a color change that can be measured spectrophotometrically. This property makes EPNBS a valuable tool in various biochemical and analytical applications, including the study of protein structure, function, and interactions.

1136-02-3

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1136-02-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1136-02-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,3 and 6 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1136-02:
(6*1)+(5*1)+(4*3)+(3*6)+(2*0)+(1*2)=43
43 % 10 = 3
So 1136-02-3 is a valid CAS Registry Number.

1136-02-3Relevant academic research and scientific papers

INVESTIGATION OF THIOSULFONIC ACIDS. XXXIV. REACTION OF THIOSULFONIC ESTERS WITH SULFENAMIDES

Boldyrev, B. G.,Bilozor, T. K.

, p. 1669 - 1671 (2007/10/02)

Thiosulfonic esters react with sulfenamides to form different thiosulfonic esters and sulfenamides.The process is only realized with initial esters having high reactivity and amides having high nucleophilicity, both significantly higher than the analogous characteristics of the final products.

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