3,13,13-trimethyl-2,3,4,4a,5b,6,11,11a,13,13a-decahydro-1H,5aH-5-oxa-12a-aza-dibenzo[b,h]fluoren-12-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 402858-45-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,2,8,5 and 8 respectively; the second part has 2 digits, 4 and 5 respectively. Calculate Digit Verification of CAS Registry Number 402858-45: (8*4)+(7*0)+(6*2)+(5*8)+(4*5)+(3*8)+(2*4)+(1*5)=141 141 % 10 = 1 So 402858-45-1 is a valid CAS Registry Number.