4,12-Dioxa-3,13-disilapentadec-7-yn-6-one,
2,2,3,3,13,13,14,14-octamethyl-5-[4-(trimethylsilyl)-3-butynyl]- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 915975-74-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,5,9,7 and 5 respectively; the second part has 2 digits, 7 and 4 respectively. Calculate Digit Verification of CAS Registry Number 915975-74: (8*9)+(7*1)+(6*5)+(5*9)+(4*7)+(3*5)+(2*7)+(1*4)=215 215 % 10 = 5 So 915975-74-5 is a valid CAS Registry Number.