4-(4-hydroxy-2-methyl-phenylazo)-benzenesulfonic acid is an organic compound characterized by its azo and sulfonic acid functional groups. It is a derivative of benzenesulfonic acid, where a 4-hydroxy-2-methyl-phenylazo group is attached to the para position of the benzene ring. 4-(4-hydroxy-2-methyl-phenylazo)-benzenesulfonic acid is known for its color-forming properties and is often used as a dye or pigment in various industrial applications. Its chemical structure allows for the formation of strong colorants, making it a valuable component in the production of textiles, plastics, and other materials that require vibrant and stable colors.
2191-07-3
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Basic information
- Product Name: 4-(4-hydroxy-2-methyl-phenylazo)-benzenesulfonic acid
- Synonyms: 4-(4-hydroxy-2-methyl-phenylazo)-benzenesulfonic acid
- CAS NO:2191-07-3
- Molecular Formula:
- Molecular Weight: 292.315
- EINECS: N/A
- Product Categories: N/A
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Chemical Properties
- Melting Point: N/A
- Boiling Point: N/A
- Flash Point: N/A
- Appearance: N/A
- Density: N/A
- Refractive Index: N/A
- Storage Temp.: N/A
- Solubility: N/A
- CAS DataBase Reference: 4-(4-hydroxy-2-methyl-phenylazo)-benzenesulfonic acid(CAS DataBase Reference)
- NIST Chemistry Reference: 4-(4-hydroxy-2-methyl-phenylazo)-benzenesulfonic acid(2191-07-3)
- EPA Substance Registry System: 4-(4-hydroxy-2-methyl-phenylazo)-benzenesulfonic acid(2191-07-3)
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Safety Data
- Hazard Codes: N/A
- Statements: N/A
- Safety Statements: N/A
- WGK Germany:
- RTECS:
- HazardClass: N/A
- PackingGroup: N/A
- Hazardous Substances Data: 2191-07-3(Hazardous Substances Data)
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Check Digit Verification of cas no
The CAS Registry Mumber 2191-07-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,9 and 1 respectively; the second part has 2 digits, 0 and 7 respectively.Calculate Digit Verification of CAS Registry Number 2191-07:
(6*2)+(5*1)+(4*9)+(3*1)+(2*0)+(1*7)=63
63 % 10 = 3
So 2191-07-3 is a valid CAS Registry Number.
2191-07-3Upstream product
2191-07-3Downstream Products
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4-(4-hydroxy-2-methyl-phenylazo)-benzenesulfonic acid
