8-(4-chloro-phenylazo)-7-hydroxy-naphthalene-1,3-disulfonic acid is a complex organic compound with the molecular formula C16H11ClN2O6S2. It is characterized by a naphthalene core, which is a fused ring system consisting of two benzene rings. One of the naphthalene rings is modified with a hydroxyl group at the 7-position, and the other is substituted with a disulfonic acid group at the 1 and 3 positions. The compound also features a 4-chloro-phenylazo group attached at the 8-position, which is a functional group derived from a diazonium compound and a phenol, giving the molecule its characteristic color. 8-(4-chloro-phenylazo)-7-hydroxy-naphthalene-1,3-disulfonic acid is known for its use as a dye, particularly in the textile industry, due to its ability to form strong, stable colors. Its chemical structure allows for a range of applications, including the coloring of fabrics and other materials, where its stability and colorfastness are valued.

4620-75-1

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Basic information
1. Product Name: 8-(4-chloro-phenylazo)-7-hydroxy-naphthalene-1,3-disulfonic acid
2. Synonyms:
3. CAS NO:4620-75-1
4. Molecular Formula:
5. Molecular Weight: 442.858
6. EINECS: N/A
7. Product Categories: N/A
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: N/A
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 8-(4-chloro-phenylazo)-7-hydroxy-naphthalene-1,3-disulfonic acid(CAS DataBase Reference)
10. NIST Chemistry Reference: 8-(4-chloro-phenylazo)-7-hydroxy-naphthalene-1,3-disulfonic acid(4620-75-1)
11. EPA Substance Registry System: 8-(4-chloro-phenylazo)-7-hydroxy-naphthalene-1,3-disulfonic acid(4620-75-1)
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: 4620-75-1(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 4620-75-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,2 and 0 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 4620-75:
(6*4)+(5*6)+(4*2)+(3*0)+(2*7)+(1*5)=81
81 % 10 = 1
So 4620-75-1 is a valid CAS Registry Number.

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