C.I.Direct Blue 30 is a synthetic dye characterized by its dark green to light blue color. It is soluble in water, producing a blue color, and slightly soluble in ethanol, resulting in a violet blue shade. The dye exhibits various color changes when exposed to different acids and bases, such as turning blue-ray green in strong sulfuric acid and dark after dilution, or red in nitric acid followed by black upon dilution. When mixed with strong hydrochloric acid, the dye solution forms a blue precipitate, and the addition of a thick sodium hydroxide solution results in blue precipitation.
6656-08-2
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Basic information
- Product Name: C.I.Direct Blue 30
- Synonyms: C.I.31955;C.I.Direct Blue 30;Congo Fast Blue B;Direct Fast Blue B;Direct Fast Blue CB;Pyrazol Fast Cyanine CB
- CAS NO:6656-08-2
- Molecular Formula: C44H28N6Na4O16S4
- Molecular Weight: 1116.9428
- EINECS: N/A
- Product Categories: N/A
- Mol File: 6656-08-2.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: C.I.Direct Blue 30(CAS DataBase Reference)
- NIST Chemistry Reference: C.I.Direct Blue 30(6656-08-2)
- EPA Substance Registry System: C.I.Direct Blue 30(6656-08-2)
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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: 6656-08-2(Hazardous Substances Data)
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6656-08-2 Usage
Uses
Used in Textile Industry:C.I.Direct Blue 30 is used as a dye for coloring textiles, providing a vibrant blue hue. Its light fastness, acid resistance, and alkali resistance make it suitable for various textile applications.
Used in Leather Industry:
C.I.Direct Blue 30 is used as a dye for leather, offering a consistent and long-lasting color. Its resistance to fading and staining in water and soaping processes makes it an ideal choice for leather goods.
Used in Paper Industry:
C.I.Direct Blue 30 is used as a dye for coloring paper, imparting a rich blue shade. Its properties, such as acid and alkali resistance, contribute to the durability and stability of the colored paper.
Standard:
The performance of C.I.Direct Blue 30 is measured using the ISO and AATCC standards, which evaluate its acid resistance, alkali resistance, light fastness, and resistance to fading and staining. The dye has received ratings of 3-4 for acid resistance, 4 for alkali resistance, 3 for light fastness, 1-2 for water fading, and 1-2 for stain fading according to the ISO standard. In the AATCC standard, it has received ratings of 5 for acid resistance, 4-5 for alkali resistance, 2-3 for light fastness, and 3 for stain fading.
Preparation
3,3′-Dimethoxylbenzidine double nitriding, first with Naphthalen-1-amine, and then three diazo, and 8-Hydroxynaphthalene-1,6-disulfonic acid (2 Moore) coupled.Standard
Acid ResistanceFading
StainISO
3-4AATCC
5Check Digit Verification of cas no
The CAS Registry Mumber 6656-08-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,5 and 6 respectively; the second part has 2 digits, 0 and 8 respectively.Calculate Digit Verification of CAS Registry Number 6656-08:
(6*6)+(5*6)+(4*5)+(3*6)+(2*0)+(1*8)=112
112 % 10 = 2
So 6656-08-2 is a valid CAS Registry Number.
6656-08-2Upstream product
6656-08-2Downstream Products
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C.I.Direct Blue 30
