61445-50-9 Usage
Uses
2,3'',4,4''-Tetrahydroxybenzophenone is a photoresist layer.
Preparation
Preparation by reaction of protocatechuic acid with resorcinol, ? in the presence of zinc chloride at 160° (Nencki reaction); ? in the presence of zinc chloride and phosphorous oxychloride for 4 days at r.t. (69%).
Check Digit Verification of cas no
The CAS Registry Mumber 61445-50-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,1,4,4 and 5 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 61445-50:
(7*6)+(6*1)+(5*4)+(4*4)+(3*5)+(2*5)+(1*0)=109
109 % 10 = 9
So 61445-50-9 is a valid CAS Registry Number.
InChI:InChI=1/C13H10O5/c14-8-2-3-9(11(16)6-8)13(18)7-1-4-10(15)12(17)5-7/h1-6,14-17H