Disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate is a water-soluble azo dye with a vibrant yellow-red color. It exhibits unique color changes when interacting with different chemicals, such as turning blue in strong sulfuric acid and pink when diluted. This characteristic makes it a versatile compound for various applications.
6226-74-0
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Basic information
- Product Name: disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate
- Synonyms: C.I.27155;C.I.Acid Red 70;disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate;Acid red 70 (C.I. 27155);7-Hydroxy-8-[[4-[(4-sodiosulfophenyl)azo]phenyl]azo]naphthalene-1-sulfonic acid sodium salt
- CAS NO:6226-74-0
- Molecular Formula: C22H14N4Na2O7S2
- Molecular Weight: 556.4787
- EINECS: 228-317-1
- Product Categories: N/A
- Mol File: 6226-74-0.mol
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Chemical Properties
- Melting Point: N/A
- Boiling Point: N/A
- Flash Point: N/A
- Appearance: /
- Density: N/A
- Refractive Index: N/A
- Storage Temp.: N/A
- Solubility: N/A
- CAS DataBase Reference: disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate(CAS DataBase Reference)
- NIST Chemistry Reference: disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate(6226-74-0)
- EPA Substance Registry System: disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate(6226-74-0)
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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: 6226-74-0(Hazardous Substances Data)
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6226-74-0 Usage
Uses
Used in Textile Industry:Disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate is used as a colorant for dyeing textiles, providing a range of shades from red-orange to dark purple depending on the pH and the presence of other chemicals. Its light fastness, soaping, perspiration fastness, and resistance to oxygen bleaching and seawater make it suitable for various textile applications.
Used in Analytical Chemistry:
This azo dye can be employed as an indicator in analytical chemistry due to its color-changing properties. It can be used to detect the presence of specific chemicals or to measure pH levels, making it a valuable tool in laboratories and research settings.
Used in Art and Crafts:
The vibrant color and color-changing properties of disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate make it an attractive choice for use in art and crafts. It can be used to create unique and visually striking effects in paintings, textiles, and other creative projects.
Used in Educational Demonstrations:
The color-changing properties of this azo dye can be utilized in educational settings to demonstrate chemical reactions and principles. It can be used to teach students about pH, acid-base reactions, and the behavior of different chemicals, making learning more engaging and interactive.
Preparation
4-((4-Aminophenyl)diazenyl)benzenesulfonic acid diazo, and 7-Hydroxynaphthalene-1-sulfonic acid coupling.Standard
Light FastnessFading
StainISO
4Check Digit Verification of cas no
The CAS Registry Mumber 6226-74-0 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 4 respectively.Calculate Digit Verification of CAS Registry Number 6226-74:
(6*6)+(5*2)+(4*2)+(3*6)+(2*7)+(1*4)=90
90 % 10 = 0
So 6226-74-0 is a valid CAS Registry Number.
InChI:InChI=1/C22H16N4O7S2.2Na/c27-21-12-2-14-1-9-19(35(31,32)33)13-20(14)22(21)26-25-16-5-3-15(4-6-16)23-24-17-7-10-18(11-8-17)34(28,29)30;;/h1-13,25H,(H,28,29,30)(H,31,32,33);;/q;2*+1/p-2/b24-23+,26-22-;;
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disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate
