5-[(4-Ethoxyphenyl)azo]-2-hydroxybenzoic acid sodium salt is a synthetic organic compound with the chemical formula C15H12N2O5Na. It is a sodium salt derivative of 5-[(4-ethoxyphenyl)azo]-2-hydroxybenzoic acid, which is characterized by the presence of an azo group (-N=N-) connecting a 4-ethoxyphenyl group to a 2-hydroxybenzoic acid moiety. 5-[(4-Ethoxyphenyl)azo]-2-hydroxybenzoic acid sodium salt is often used as a pH indicator, colorant, or dye in various applications due to its ability to change color in response to changes in pH levels. It is soluble in water and exhibits a yellow color in its sodium salt form, which can be useful in analytical chemistry and industrial processes where color change is a key indicator of chemical reactions or conditions.

3125-58-4

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Basic information
1. Product Name: 5-[(4-Ethoxyphenyl)azo]-2-hydroxybenzoic acid sodium salt
2. Synonyms: 5-[(4-Ethoxyphenyl)azo]-2-hydroxybenzoic acid sodium salt;C.I.14080;C.I.Mordant Yellow 38
3. CAS NO:3125-58-4
4. Molecular Formula: C15H14 N2 O4 . Na
5. Molecular Weight: 0
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 3125-58-4.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: 5-[(4-Ethoxyphenyl)azo]-2-hydroxybenzoic acid sodium salt(CAS DataBase Reference)
10. NIST Chemistry Reference: 5-[(4-Ethoxyphenyl)azo]-2-hydroxybenzoic acid sodium salt(3125-58-4)
11. EPA Substance Registry System: 5-[(4-Ethoxyphenyl)azo]-2-hydroxybenzoic acid sodium salt(3125-58-4)
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: 3125-58-4(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 3125-58-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,1,2 and 5 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 3125-58:
(6*3)+(5*1)+(4*2)+(3*5)+(2*5)+(1*8)=64
64 % 10 = 4
So 3125-58-4 is a valid CAS Registry Number.

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