2-(Diphenyl-phosphinoyl)-6,7,9,10,12,13,15,16-octahydro-5,8,11,14,17-pentaoxa-benzocyclopentadecene is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 134403-61-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,4,0 and 3 respectively; the second part has 2 digits, 6 and 1 respectively. Calculate Digit Verification of CAS Registry Number 134403-61: (8*1)+(7*3)+(6*4)+(5*4)+(4*0)+(3*3)+(2*6)+(1*1)=95 95 % 10 = 5 So 134403-61-5 is a valid CAS Registry Number.