4-Chlor-3-nitro-salicylsaeure, also known as 4-chloro-3-nitro-salicylic acid, is an organic compound with the chemical formula C7H4ClNO5. It is a derivative of salicylic acid, featuring a chlorine atom at the 4th position and a nitro group at the 3rd position on the benzene ring. This yellow crystalline solid is an important intermediate in the synthesis of various pharmaceuticals, dyes, and agrochemicals. It is also used in the preparation of certain colorants and as a reagent in analytical chemistry. Due to its reactivity, it is typically handled with care in a laboratory setting.
The CAS Registry Mumber 5022-52-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,0,2 and 2 respectively; the second part has 2 digits, 5 and 2 respectively. Calculate Digit Verification of CAS Registry Number 5022-52: (6*5)+(5*0)+(4*2)+(3*2)+(2*5)+(1*2)=56 56 % 10 = 6 So 5022-52-6 is a valid CAS Registry Number.