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186493-82-3

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186493-82-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 186493-82-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,6,4,9 and 3 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 186493-82:
(8*1)+(7*8)+(6*6)+(5*4)+(4*9)+(3*3)+(2*8)+(1*2)=183
183 % 10 = 3
So 186493-82-3 is a valid CAS Registry Number.

186493-82-3Downstream Products

186493-82-3Relevant articles and documents

Preparation and physicochemical properties of F-tert-butyl alkyl ethers

Takada, Naoto,Abe, Takashi,Sekiya, Akira

, p. 167 - 171 (1998)

As a part of studies on the development of CFCs alternatives, F-tert-butyl alkyl ethers [(CF3)3COMe and (CF3)3COEt] were prepared and their basic physicochemical properties were determined. They were prepared by alkylation of isolated (CF3)3CONa with dialkyl sulfates [(RO2)2SO2: R = CH3, C2H5] with good yields. It was found that the yields were affected by the kind of polyglymes used as a solvent. Tetraglyme was a much better solvent than diglyme for dissolving (CF3)3CONa, this fact being ascribed to the number of intramolecular oxygen atoms in polyglymes for coordination to Na+. A correlation between the structure of the F-butyl group of the ether, C4F9OR, and some physical properties was observed, in which an ether having an F-tert-butyl group has a lower boiling point and gaseous thermal conductivity compared with that having an F-n-butyl group.

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