1021381-67-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1021381-67-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,1,3,8 and 1 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1021381-67:
(9*1)+(8*0)+(7*2)+(6*1)+(5*3)+(4*8)+(3*1)+(2*6)+(1*7)=98
98 % 10 = 8
So 1021381-67-8 is a valid CAS Registry Number.
1021381-67-8Relevant articles and documents
A new short synthesis of 5,6-dimethylxanthenone-4-acetic acid (ASA404, DMXAA)
Yang, Shangjin,Denny, William A.
experimental part, p. 3945 - 3947 (2009/10/04)
A new short synthesis of 5,6-dimethylxanthenone-4-acetic acid (ASA404) is developed. The key steps of the synthesis are dibromination of 3,4-dimethylbenzoic acid, followed by regioselective coupling with 2-hydroxyphenylacetic acid and subsequent cyclodehydration.