70140-60-2 Usage
General Description
4-Methylsulfanyl-benzenesulfonic acid, also known as p-tolylsulfonic acid, is a white crystalline solid with the chemical formula C7H8O3S2. It is a sulfonic acid derivative, containing a sulfonic acid group (-SO3H) attached to a benzene ring with a methylthio substituent. 4-Methylsulfanyl-benzenesulfonic acid is used as a catalyst in organic synthesis, particularly in the production of pharmaceuticals and dyes. It is also employed in the synthesis of polymers, plastics, and fragrances. Additionally, 4-Methylsulfanyl-benzenesulfonic acid is used as an intermediate in the manufacture of agricultural chemicals and as a corrosion inhibitor in industrial processes. Due to its acidic nature, it must be handled with care and stored in a cool, dry place.
Check Digit Verification of cas no
The CAS Registry Mumber 70140-60-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,1,4 and 0 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 70140-60:
(7*7)+(6*0)+(5*1)+(4*4)+(3*0)+(2*6)+(1*0)=82
82 % 10 = 2
So 70140-60-2 is a valid CAS Registry Number.
70140-60-2Relevant articles and documents
Sustainable access to sulfonic acids from halides and thiourea dioxide with air
Zhang, Hui,Wang, Ming,Jiang, Xuefeng
supporting information, p. 8238 - 8242 (2020/12/29)
A sustainable and mild one-step strategy is explored for the synthesis of aryl and alkyl sulfonic acids using a facile combination of halides and sulfur dioxide surrogates under air. The cheap industrial material thiourea dioxide was employed as an eco-friendly and easy-handling sulfur dioxide surrogate, while air was used as a green oxidant. Both aryl and alkyl sulfonic acids were obtained under transition metal-catalyzed or transition metal-free conditions. Mechanistic studies demonstrated that sulfinate was involved as an intermediate in this transformation. Notably, this protocol has been applied to the late-stage sulfonation of the drugs naproxen, isoxepac and ibuprofen.
