10359-84-9 Usage
General Description
4,4'-bis[(4-ethoxyphenyl)azo]stilbene- 2,2'-disulphonic acid, also known as Eriochrome Black T, is a synthetic organic compound commonly used as a pH indicator in analytical chemistry. It appears as a dark brown powder and is soluble in water, making it easy to use in aqueous solutions. As a pH indicator, it changes color in different pH ranges, and can be used to determine the endpoint of complexometric titrations. It is also used in the textile industry as a dye and in the manufacture of inks and coatings. However, it is also classified as a hazardous substance due to its toxic effects on aquatic life and potential harm to human health, particularly if ingested or inhaled. Therefore, proper safety precautions should be taken when handling this chemical.
Check Digit Verification of cas no
The CAS Registry Mumber 10359-84-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,0,3,5 and 9 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 10359-84:
(7*1)+(6*0)+(5*3)+(4*5)+(3*9)+(2*8)+(1*4)=89
89 % 10 = 9
So 10359-84-9 is a valid CAS Registry Number.