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81292-97-9

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81292-97-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81292-97-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,2,9 and 2 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81292-97:
(7*8)+(6*1)+(5*2)+(4*9)+(3*2)+(2*9)+(1*7)=139
139 % 10 = 9
So 81292-97-9 is a valid CAS Registry Number.

81292-97-9Downstream Products

81292-97-9Relevant articles and documents

Sulfosilylation of Aromatic Hydrocarbons by Trimethylsilyl Chlorosulfonate

Hofmann, Karin,Simchen, Gerhard

, p. 282 - 297 (2007/10/02)

Aromatic hydrocarbons 2 ,6 ,8 ,9 ,13 ,16 ,18 ,19 ,22 react with trimethylsilyl chlorosulfonate (1) to give trimethylsilyl arenesulfonates 5, 7, 11, 12, 15, 23 or sulfonic acids 17, 20, 21.If trimethylsilyl sulfonates are obtained, working up of the sulfonation mixtures is possible by distillation.By hydrohalogenolysis of trimethylsilyl sulfonates 5 at 0-5 deg C anhydrous sulfonic acids 3 result.The pathways to diphenylsulfone (25a) in the reaction of benzene (2a) with 1 were investigated.In this connection we succeeded in synthesizing benzenepyrosulfonic acid (28) and trimethylsilyl benzenepyrosulfonate (29).

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