4-BROMO-2-CHLORO-6-METHYLPHENYL ISOCYANATE is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 77159-77-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,1,5 and 9 respectively; the second part has 2 digits, 7 and 7 respectively. Calculate Digit Verification of CAS Registry Number 77159-77: (7*7)+(6*7)+(5*1)+(4*5)+(3*9)+(2*7)+(1*7)=164 164 % 10 = 4 So 77159-77-4 is a valid CAS Registry Number.