4681-78-1 Usage
General Description
2,3,5,6-tetramethylbenzenesulfonic acid is an organic compound commonly used as a reagent in organic synthesis and as a catalyst in various chemical reactions. It is a sulfonic acid derivative of benzene with four methyl groups attached to the ring. 2,3,5,6-tetramethylbenzenesulfonic acid is a strong acid and a non-oxidizing agent, and is often used as a source of the tetrachloride for preparation of a wide variety of tetrachlorometallophthalocyanines. It is also used as an acid catalyst in esterification and transesterification reactions and as a corrosion inhibitor in metalworking fluids. Additionally, it is used for the preparation of various pharmaceuticals and agrochemicals.
Check Digit Verification of cas no
The CAS Registry Mumber 4681-78-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,8 and 1 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4681-78:
(6*4)+(5*6)+(4*8)+(3*1)+(2*7)+(1*8)=111
111 % 10 = 1
So 4681-78-1 is a valid CAS Registry Number.