137408-18-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137408-18-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,4,0 and 8 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 137408-18:
(8*1)+(7*3)+(6*7)+(5*4)+(4*0)+(3*8)+(2*1)+(1*8)=125
125 % 10 = 5
So 137408-18-5 is a valid CAS Registry Number.
137408-18-5Relevant articles and documents
Intramolecular acylation during acid chloride formation of some o-styryl phenoxyacetic acids
Biswas,Ghosh,Venkateswaran
, p. 1865 - 1874 (1991)
o-Isopropenyl phenoxyacetic acids 1 and 8 on treatment with thionyl chloride followed by aqueous workup furnished the acylated products 4 and 9 in moderate yields. The corresponding acid chlorides could also be cyclised with stannic chloride. The acid chl