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Sulfuric acid, mono(2-methylphenyl) ester, also known as 2-methylphenyl hydrogen sulfate or o-tolyl hydrogen sulfate, is an organic compound with the chemical formula C7H8O3S. It is a colorless to pale yellow liquid that is soluble in water and organic solvents. This ester is formed by the reaction of sulfuric acid with 2-methylphenol (o-cresol), where one hydroxyl group of the sulfuric acid is replaced by the 2-methylphenyl group. It is used as an intermediate in the synthesis of various organic compounds, such as pharmaceuticals, dyes, and agrochemicals. Due to its reactivity, it is important to handle Sulfuric acid, mono(2-methylphenyl) ester with care, as it can cause irritation to the skin, eyes, and respiratory system.

3233-56-5

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3233-56-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3233-56-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,2,3 and 3 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 3233-56:
(6*3)+(5*2)+(4*3)+(3*3)+(2*5)+(1*6)=65
65 % 10 = 5
So 3233-56-5 is a valid CAS Registry Number.

3233-56-5Relevant academic research and scientific papers

Method for producing a bisphenol, and, production of polycarbonate resin (by machine translation)

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Paragraph 0094-0095; 0098-0099; 0102-0103; 0106-0107; 0110-, (2019/08/21)

[Problem] aromatic alcohols and ketone or aldehyde from reaction of bisphenol a, bisphenol to shorten the reaction time, produced bisphenol selectivity is improved, having good color tone bisphenol production can be obtained. [Solution] aromatic alcohols containing organic phase, the aqueous phase is separated from the oil and water containing sulfuric acid, wherein the organic phase in the aromatic alcoholic sulfone acid, aromatic alcoholic sulfone acid (1) to obtain a liquid reaction product containing, a reaction liquid containing the aromatic alcoholic sulfone acid, ketone or aldehyde mixture, the aromatic alcoholic sulfone in the presence of acid, the aromatic alcohol, wherein said step (2) produced from a ketone or aldehyde to bisphenol a, bisphenol a production. [Drawing] no (by machine translation)

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