6406-21-9 Usage
General Description
2-Amino-3,5-dichlorobenzenesulfonic acid is a chemical compound with the molecular formula C6H5Cl2NO3S. It belongs to the class of sulfonic acids and is a derivative of sulfanilic acid. 2-Amino-3,5-dichlorobenzenesulfonic acid is commonly used as an intermediate in the synthesis of dyes and pigments. Its primary application is in the production of azo dyes, which are widely used in the textile and paper industries. Additionally, it is also used as a pH indicator and as a reagent in analytical chemistry. 2-Amino-3,5-dichlorobenzenesulfonic acid is a white to off-white crystalline solid and is soluble in water, making it a versatile and useful compound in various industrial applications.
Check Digit Verification of cas no
The CAS Registry Mumber 6406-21-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,0 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6406-21:
(6*6)+(5*4)+(4*0)+(3*6)+(2*2)+(1*1)=79
79 % 10 = 9
So 6406-21-9 is a valid CAS Registry Number.
6406-21-9Relevant articles and documents
AZO COMPOUND, INK COMPOSITION, RECORDING METHOD AND COLORED MATTER
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Paragraph 0123-0124, (2017/04/14)
PROBLEM TO BE SOLVED: To provide a dye having a high-quality black hue with excellent ozone resistance, light resistance, humidity resistance and the like. SOLUTION: The present invention provides an azo compound represented by formula (1) or a tautomer thereof, or a salt thereof (R1 is a (C1-C4) alkyl group or the like; R2 is a cyano group; R3 and R4 are H, a sulfo group or the like; R5 and R7 are a (C1-C4) alkylthio group or the like; R6 and R8 is a (C1-C4) alkylcarbonyl amino group; R9 is a sulfo (C1-C4) alkoxy group; R10 is a methyl group; R11-R13 are H, a sulfo group, a halogen atom; and at least two of R11-R13 are a halogen atom). SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
