639785-94-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639785-94-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,7,8 and 5 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 639785-94:
(8*6)+(7*3)+(6*9)+(5*7)+(4*8)+(3*5)+(2*9)+(1*4)=227
227 % 10 = 7
So 639785-94-7 is a valid CAS Registry Number.
639785-94-7Relevant articles and documents
3,3,4,4-TETRAFLUOROCYCLOPENTANE COMPOUNDS, USED AS COMPONENTS OF LIQUID CRYSTAL MEDIA
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Page 32, (2008/06/13)
The invention relates to 3,3,4,4-tetrafluorocyclopentane compounds of formula (I), in which R1, A1, A2, Z1, Z2 and m are defined as cited in claim 1. Said compounds are suitable for use as components of liquid crystal media.
