31273-65-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31273-65-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,2,7 and 3 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 31273-65:
(7*3)+(6*1)+(5*2)+(4*7)+(3*3)+(2*6)+(1*5)=91
91 % 10 = 1
So 31273-65-1 is a valid CAS Registry Number.
31273-65-1Relevant articles and documents
SYNTHESIS OF QUERCETINSULFONIC ACID
Kopacz, M.,Nitka, B.,Push, Ya.,Kopacz, S.
, p. 1490 - 1492 (2007/10/02)
The sulfonation of quercetin was investigated at various temperatures (0-80 deg C), for various times (0.5-70 h), and with various degrees of agitation.Intensive agitation during sulfonation to quercetin-5'-sulfonic acid and reduction of the sulfonation t