7-Hydroxy-8-[[4-(phenylazo)phenyl]azo]naphthalene-1-sulfonic acid sodium salt is a complex organic compound with the chemical formula C26H17N3NaO4S. It is a derivative of naphthalene, featuring a hydroxyl group at the 7-position, an azo group at the 8-position, and a sulfonic acid group at the 1-position. The azo group is connected to a phenyl ring, which in turn is connected to another phenyl ring through another azo group. 7-Hydroxy-8-[[4-(phenylazo)phenyl]azo]naphthalene-1-sulfonic acid sodium salt is typically used as a pH indicator, as it exhibits a color change in response to changes in acidity or alkalinity. It is also known for its applications in dye chemistry and as a reagent in various analytical procedures. The sodium salt form of the compound enhances its solubility in aqueous solutions, making it more suitable for use in various chemical and industrial processes.

6226-73-9

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Basic information
1. Product Name: 7-Hydroxy-8-[[4-(phenylazo)phenyl]azo]naphthalene-1-sulfonic acid sodium salt
2. Synonyms: 7-Hydroxy-8-[[4-(phenylazo)phenyl]azo]naphthalene-1-sulfonic acid sodium salt;C.I.27150;Metanil Red 3B
3. CAS NO:6226-73-9
4. Molecular Formula:
5. Molecular Weight: 0
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 6226-73-9.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: 7-Hydroxy-8-[[4-(phenylazo)phenyl]azo]naphthalene-1-sulfonic acid sodium salt(CAS DataBase Reference)
10. NIST Chemistry Reference: 7-Hydroxy-8-[[4-(phenylazo)phenyl]azo]naphthalene-1-sulfonic acid sodium salt(6226-73-9)
11. EPA Substance Registry System: 7-Hydroxy-8-[[4-(phenylazo)phenyl]azo]naphthalene-1-sulfonic acid sodium salt(6226-73-9)
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: 6226-73-9(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 6226-73-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,2,2 and 6 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 6226-73:
(6*6)+(5*2)+(4*2)+(3*6)+(2*7)+(1*3)=89
89 % 10 = 9
So 6226-73-9 is a valid CAS Registry Number.

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