2,3,6,7-tetrahydro-10-hydroxy-2,2,8,8-tetramethyl-4H,8H-benzo<1,2-b:5,4-b'>dipyran-4-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 85434-20-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,5,4,3 and 4 respectively; the second part has 2 digits, 2 and 0 respectively. Calculate Digit Verification of CAS Registry Number 85434-20: (7*8)+(6*5)+(5*4)+(4*3)+(3*4)+(2*2)+(1*0)=134 134 % 10 = 4 So 85434-20-4 is a valid CAS Registry Number.