155167-42-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 155167-42-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,1,6 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 155167-42:
(8*1)+(7*5)+(6*5)+(5*1)+(4*6)+(3*7)+(2*4)+(1*2)=133
133 % 10 = 3
So 155167-42-3 is a valid CAS Registry Number.
InChI:InChI=1/C10H4F4O2S/c1-16-10(15)4-2-3-5(11)6(12)7(13)8(14)9(3)17-4/h2H,1H3
155167-42-3Relevant articles and documents
Oxidation and halogenation of methyl 4,5,6,7-tetrafluorobenzothiophen-2-carboxylate
Shirley, I. M.
, p. 51 - 58 (2007/10/02)
4,5,6,7-tetrafluorobenzothiophen-2-carboxylic acid (IA) was prepared by a modified literature procedure in two steps from pentafluorobenzaldehyde and rhodanine.Its methyl ester (IB) was synthesised via the acid chloride (IC) by reaction with methanol.O