71735-26-7 Usage
General Description
[(2-methyl-4-nitrophenyl)amino]benzenesulphonic acid, also known as Methyl Red, is an organic chemical compound commonly used as a pH indicator in laboratory experiments. It appears as a dark red powder and is soluble in water, alcohol, and acetone. Methyl Red changes color from red to yellow at pH levels below 4.4, making it useful for differentiating between acidic and basic solutions. It is also used in the production of dyes and as a colorant in medicine and food products. However, exposure to high concentrations of Methyl Red may cause irritation to the skin, eyes, and respiratory system, and it should be handled with caution and appropriate protective measures.
Check Digit Verification of cas no
The CAS Registry Mumber 71735-26-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,7,3 and 5 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 71735-26:
(7*7)+(6*1)+(5*7)+(4*3)+(3*5)+(2*2)+(1*6)=127
127 % 10 = 7
So 71735-26-7 is a valid CAS Registry Number.
InChI:InChI=1/C13H12N2O5S/c1-9-8-10(15(16)17)6-7-11(9)14-12-4-2-3-5-13(12)21(18,19)20/h2-8,14H,1H3,(H,18,19,20)