89847-85-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89847-85-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,8,4 and 7 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 89847-85:
(7*8)+(6*9)+(5*8)+(4*4)+(3*7)+(2*8)+(1*5)=208
208 % 10 = 8
So 89847-85-8 is a valid CAS Registry Number.
89847-85-8Relevant articles and documents
Synthesis and reactions of 4-sulpho-2,3,5,6-tetrafluorobenzoic acid
Fielding, H. C.,Shirley, I. M.
, p. 15 - 31 (2007/10/02)
4-Sulpho-2,3,5,6-tetrafluorobenzoic acid (I) has been synthesised from pentafluorobenzoic acid via the oxidation of 4-mercapto-tetrafluorobenzoic acid.Reaction of I with DMF/SOCl2 gave 1,4-ClC6F4COCl (IIA) which was converted to 1,4-ClC6F4COF (IIB) by flu