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21809-52-9

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21809-52-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21809-52-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,0 and 9 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21809-52:
(7*2)+(6*1)+(5*8)+(4*0)+(3*9)+(2*5)+(1*2)=99
99 % 10 = 9
So 21809-52-9 is a valid CAS Registry Number.

21809-52-9Downstream Products

21809-52-9Relevant articles and documents

Synthesis, structural and antioxidant studies of some novel N-ethyl phthalimide esters

Kumar, C.S. Chidan,Loh, Wan-Sin,Chandraju, Siddegowda,Win, Yip-Foo,Tan, Weng Kang,Quah, Ching Kheng,Fun, Hoong-Kun

, (2015)

A series of N-ethyl phthalimide esters 4(a-n) were synthesized and characterized by spectroscopic studies. Further, the molecular structure of majority of compounds were analysed by single crystal X-ray diffraction studies. The X-ray analysis revealed the importance of substituents on the crystal stability and molecular packing. All the synthesized compounds were tested for in vitro antioxidant activity by DPPH radical scavenging, FRAP and CUPRAC methods. Few of them have shown good antioxidant activity.

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