73991-81-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 73991-81-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,9,9 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 73991-81:
(7*7)+(6*3)+(5*9)+(4*9)+(3*1)+(2*8)+(1*1)=168
168 % 10 = 8
So 73991-81-8 is a valid CAS Registry Number.
73991-81-8Relevant articles and documents
COMPOUND PROTECTING AGAINST ULTRAVIOLET
-
Page/Page column 9, (2010/02/13)
An ultraviolet ray protection agent including a compound having an ultraviolet ray protection effect as an active ingredient. The compound is expressed by general formula I': wherein X represents NH or O; Y' represents a vinyl group substituted by a methy