155333-82-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 155333-82-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,3,3 and 3 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 155333-82:
(8*1)+(7*5)+(6*5)+(5*3)+(4*3)+(3*3)+(2*8)+(1*2)=127
127 % 10 = 7
So 155333-82-7 is a valid CAS Registry Number.
155333-82-7Relevant articles and documents
CHLOROSULFONATION OF 9-ARYL 3,3,6,6-TETRAMETHYLOCTAHYDROXANTHEN-1,8-DIONES
Cremlyn, Richard J.,Saunders, David
, p. 73 - 82 (2007/10/02)
The 9-aryl-3,3,6,6-tetramethyloctahydroxanthendiones (4-20) react with chlorosulfonic acid to give the sulfonyl chlorides (25, 34, 43, 53, 55, 59, 63, and 65).The xanthendione (7) from m-anisaldehyde afforded the bis-sulfonyl chloride (30).The products we
