216451-89-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216451-89-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,4,5 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 216451-89:
(8*2)+(7*1)+(6*6)+(5*4)+(4*5)+(3*1)+(2*8)+(1*9)=127
127 % 10 = 7
So 216451-89-7 is a valid CAS Registry Number.
216451-89-7Relevant articles and documents
Synthesis and properties of metal phthalocyanines based on disulfophthalic acid
Kulinich,Shaposhnikov,Gorelov,Chernyaeva
, p. 1331 - 1336 (2008/02/04)
Octasulfo-substituted cobalt phthalocyaninate was synthesized from 3,5-disulfophthalic acid, and its ammonium salt was converted into the corresponding sulfonyl chloride by the action of chlorosulfonic acid. Treatment of the chlorosulfonyl-substituted pht
