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142717-31-5

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142717-31-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 142717-31-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,7,1 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 142717-31:
(8*1)+(7*4)+(6*2)+(5*7)+(4*1)+(3*7)+(2*3)+(1*1)=115
115 % 10 = 5
So 142717-31-5 is a valid CAS Registry Number.

142717-31-5Relevant articles and documents

The Synthesis and Transition Temperatures of Novel Low Molar Mass Cholesteric Materials Derived from (R)-2-(4-Hydroxyphenoxy)propanoic Acid

Booth, Christopher J.,Gray, George W.,Toyne, Kenneth J.,Hardy, Judith

, p. 31 - 58 (2007/10/02)

A comprehensive series of (R)-2-(4-substituted-phenoxy)propanoates and (R)-2-(4-substituted-phenoxy)propanonitriles have been prepared.A wide variety of 4-substituents and ester functions have been examined to determine how the position of the chiral centre affects the cholesteric phase formation in these classes of materials; the synthesis of these novel materials, their transition temperatures and a procedure for assessing their optical purity are described and discussed.Mesogenicity is significantly depressed if the chiral centre is placed centrally within the molecule.

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