2,2,3,3,7,7,8,8-octamethyl-1,4,6,9-tetraoxa-5λ5-phospha-spiro[4.4]nonane-5-carboxylic acid anilide is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 61890-61-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,1,8,9 and 0 respectively; the second part has 2 digits, 6 and 1 respectively. Calculate Digit Verification of CAS Registry Number 61890-61: (7*6)+(6*1)+(5*8)+(4*9)+(3*0)+(2*6)+(1*1)=137 137 % 10 = 7 So 61890-61-7 is a valid CAS Registry Number.