Sulphur Blue 7 is a red light blue to blue light purple dye, which appears as a royal purple powder. It is insoluble in water but has good solubility in sodium sulfide solution, turning green grey. In concentrated sulfuric acid, it appears blue purple and becomes dark upon dilution, precipitating afterwards. Its dyeing content in alkaline insurance powder is pale yellow light olive, which can be restored to its original color and lustre upon oxidation.
1327-57-7
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Basic information
- Product Name: Sulphur Blue 7
- Synonyms: Phenol, 4-[(4-amino-3-methylphenyl)amino]-, reaction products with sodium sulfide (Na2(Sx));Sulfur blue 7 (C.I. 53440);Asathio Blue 3B;Asathio Blue BB;Asathio Blue BS;Asathio Blue D-3B;Asathio Blue DG;Asathio Blue RC
- CAS NO:1327-57-7
- Molecular Formula: C13H14N2O
- Molecular Weight: 214.26306
- EINECS: 215-483-5
- Product Categories: UVCBs-organic-metal salts
- Mol File: 1327-57-7.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: Sulphur Blue 7(CAS DataBase Reference)
- NIST Chemistry Reference: Sulphur Blue 7(1327-57-7)
- EPA Substance Registry System: Sulphur Blue 7(1327-57-7)
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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: 1327-57-7(Hazardous Substances Data)
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1327-57-7 Usage
Uses
Used in Textile Industry:Sulphur Blue 7 is used as a dye for cotton, hemp, viscose fiber, and vinylon/cotton blended fabrics. It is also used in cotton direct printing and leather and paper dyeing.
Standard:
Sulphur Blue 7 has moderate acid resistance, severe alkali resistance, and light fastness rated 4-5 on the ISO scale and 5-6 on the AATCC scale. Its fulling, perspiration fastness, and soaping fastness are rated 3-4 (Alkali), 4-5, and 3, respectively, on the ISO scale.
Preparation
4-(4-Amino-3-methylphenylamino)phenol with Sodium polysulfide solution in return 106 ~ 112 ℃ heating 50 hours, then 70 ~ 80 ℃ blow air make precipitation. This indophenol?is by o-Toluidine and 4-Nitrosophenol in sulfuric acid, and then the condensation with Sodium polysulfide and reduction. Sodium polysulfide increase in the proportion of sulfur content and high temperature vulcanization, color is red and more bright-coloured dye.Standard
Acid ResistanceModerate
SevereISO
4AATCC
5Check Digit Verification of cas no
The CAS Registry Mumber 1327-57-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,2 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.Calculate Digit Verification of CAS Registry Number 1327-57:
(6*1)+(5*3)+(4*2)+(3*7)+(2*5)+(1*7)=67
67 % 10 = 7
So 1327-57-7 is a valid CAS Registry Number.
1327-57-7Upstream product
1327-57-7Downstream Products
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Sulphur Blue 7
