2H-1-Benzopyran-3-carboxylic acid, 7-(dimethylamino)-2-oxo-, ethyl
ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 55804-64-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,8,0 and 4 respectively; the second part has 2 digits, 6 and 4 respectively. Calculate Digit Verification of CAS Registry Number 55804-64: (7*5)+(6*5)+(5*8)+(4*0)+(3*4)+(2*6)+(1*4)=133 133 % 10 = 3 So 55804-64-3 is a valid CAS Registry Number.