2-Hydroxy-5-[[4-[(4-hydroxyphenyl)azo]-1-naphthalenyl]azo]benzoic acid sodium salt is a complex organic compound with the chemical formula C25H16N4NaO5. It is a sodium salt derivative of the parent compound, 2-hydroxy-5-[[4-[(4-hydroxyphenyl)azo]-1-naphthalenyl]azo]benzoic acid. 2-Hydroxy-5-[[4-[(4-hydroxyphenyl)azo]-1-naphthalenyl]azo]benzoic acid sodium salt is characterized by its azo linkages, which are nitrogen-nitrogen double bonds, and the presence of hydroxyl and carboxyl functional groups. It is often used as a chromogenic agent in analytical chemistry for the detection and quantification of certain metal ions, particularly in colorimetric assays. The sodium salt form enhances the solubility of the compound in aqueous solutions, which is crucial for its application in chemical analysis.

6406-34-4

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Basic information
1. Product Name: 2-Hydroxy-5-[[4-[(4-hydroxyphenyl)azo]-1-naphthalenyl]azo]benzoic acid sodium salt
2. Synonyms: 2-Hydroxy-5-[[4-[(4-hydroxyphenyl)azo]-1-naphthalenyl]azo]benzoic acid sodium salt;C.I.26500;Salicin Brown RC
3. CAS NO:6406-34-4
4. Molecular Formula: C23H16N4O4.Na
5. Molecular Weight: 0
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 6406-34-4.mol
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: /
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 2-Hydroxy-5-[[4-[(4-hydroxyphenyl)azo]-1-naphthalenyl]azo]benzoic acid sodium salt(CAS DataBase Reference)
10. NIST Chemistry Reference: 2-Hydroxy-5-[[4-[(4-hydroxyphenyl)azo]-1-naphthalenyl]azo]benzoic acid sodium salt(6406-34-4)
11. EPA Substance Registry System: 2-Hydroxy-5-[[4-[(4-hydroxyphenyl)azo]-1-naphthalenyl]azo]benzoic acid sodium salt(6406-34-4)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 6406-34-4(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 6406-34-4 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, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 6406-34:
(6*6)+(5*4)+(4*0)+(3*6)+(2*3)+(1*4)=84
84 % 10 = 4
So 6406-34-4 is a valid CAS Registry Number.

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