51868-46-3

Basic information

• Product Name: Disperse Blue 291G
• Synonyms: N-[2-[(2-bromo-4,6-dinitrophenyl)azo]-5-(diallylamino)-4-methoxyphenyl]acetamide;C.I. Disperse Blue 291G press cake;Acetamide, N-2-(2-bromo-4,6-dinitrophenyl)azo-5-(di-2-propenylamino)-4-methoxyphenyl-;N-[2-[(2-bromo-4,6-dinitrophenyl) azo]-5-(di-2-propenylamino)-4-methoxyphenyl]-Acetamide;DISPERSE BLUE 291G;2'-(2-Bromo-4,6-dinitrophenylazo)-4'-methoxy-5'-(diallylamino)acetanilide;2'-(2-Bromo-4,6-dinitrophenylazo)-5'-diallylamino-4'-methoxyacetanilide;2-(Acetylamino)-2'-bromo-4-(diallylamino)-4',6'-dinitro-5-methoxyazobenzene
• CAS NO: 51868-46-3
• Molecular Formula: C₂₁H₂₁BrN₆O₆
• Molecular Weight: 533.33204
• EINECS: 257-486-4
• Product Categories: Organics
• Mol File: 51868-46-3.mol
• Article Data: 5

Chemical Properties

• Boiling Point: 716.2°Cat760mmHg
• Flash Point: 387°C
• Appearance: /
• Density: 1.47g/cm³
• Vapor Pressure: 2.31E-20mmHg at 25°C
• Refractive Index: 1.624
• PKA: 13.39±0.70(Predicted)
• Water Solubility: 52.2μg/L at 20℃
• CAS DataBase Reference: Disperse Blue 291G(CAS DataBase Reference)
• NIST Chemistry Reference: Disperse Blue 291G(51868-46-3)
• EPA Substance Registry System: Disperse Blue 291G(51868-46-3)

Safety Data

• Hazardous Substances Data: 51868-46-3(Hazardous Substances Data)

Usage

Description

Disperse Blue 291G is a synthetic dye primarily used in the textile industry for coloring various materials, such as polyester, nylon, and acrylic fibers. It is known for its high color strength, good lightfastness, and resistance to fading, making it a popular choice for a wide range of applications.

Uses

Used in Textile Industry:
Disperse Blue 291G is used as a coloring agent for synthetic fibers, such as polyester, nylon, and acrylic, due to its high color strength, good lightfastness, and resistance to fading. It provides vibrant and long-lasting color to textiles, enhancing their visual appeal and durability.
However, it is important to note that Disperse Blue 373, a similar dye, has been found to have adverse effects on the soil and water environment and is considered a major mutagen in the environmental system. This highlights the need for responsible and sustainable practices in the textile industry to minimize the environmental impact of dye usage.

Flammability and Explosibility

Notclassified

InChI:InChI=1/C21H21BrN6O6/c1-5-7-26(8-6-2)18-11-16(23-13(3)29)17(12-20(18)34-4)24-25-21-15(22)9-14(27(30)31)10-19(21)28(32)33/h5-6,9-12H,1-2,7-8H2,3-4H3,(H,23,29)/b25-24+

Upstream product

• 51868-45-2 3-(N,N-diprop-2-enamino)-4-methoxyacetanilide 
• 7782-78-7 nitrosylsulfuric acid 
• 1817-73-8 2-bromo-4,6-dinitroaniline 

Relevant articles and documents

Composition of Black Disperse Dye

The present invention relates to a black disperse dye composition, more specifically, to a black disperse dye composition capable of improving the milling efficiency of a blue dye component of a black disperse dye and increasing, water dispersibility, improving aging stability, (clogging) color fastness during fiber dyeing. (by machine translation)

Azo disperse dye mixtures

The present invention refers to a dye mixture comprising an azo dye of the formula (I) wherein each of X and X1independently is chlorine or bromine; R1is absent or is C1-4alkyl; and each of R2and R3independently is hydrogen, C1-6alkyl or cyanoethyl; but when R1is absent, R2is n-butyl or cyanoethyl and R3is cyanoethyl; and further dye components according to claim 1, a method for the preparation of such mixtures and a method for coloring a synthetic textile material or fiber blend thereof using such mixtures.

Mutagenicity of two 2-phenylbenzotriazole derivatives, 2-[2-(acetylamino)-4-(diethylamino)-5-methoxyphenyl]-5-amino- 7-bromo-4-chloro-2H-benzotriazole and 2-[2-(acetylamino)-4-(diallylamino)-5-methoxyphenyl]-5-amino-7-bromo-4-chloro-2H-benzotriazole and their detection in river water in Japan.

We recently detected five 2-phenylbenzotriazole (PBTA)-type mutagens (PBTA-1, PBTA-2, PBTA-3, PBTA-4 and PBTA-6) in concentrates from several rivers that flow in geographically different areas in Japan containing textile-related industries. On the basis of synthesis studies, these five PBTA derivatives were deduced to have originated from the corresponding dinitrophenylazo dyes, which are industrial chemicals used in textile dyeing, via reduction and chlorination. 2-[(2-Bromo-4,6-dinitrophenyl)azo]-5-(diethylamino)-4-methoxyacetanilide (Color Index name Disperse Blue 291, CAS registry no. 56548-64-2) and 2-[(2-bromo-4,6-dinitrophenyl)azo]-5-(diallylamino)-4-methoxyacetanilide (Color Index name Disperse Blue 373, CAS registry no. 51868-46-3) are used in textile dyeing and have 2-[(2-bromo-4,6-dinitrophenyl)azo]-4-methoxyacetanilide moieties in their structures, which are thought to be essential for their conversion to mutagenic PBTA derivatives. In the present study we have synthesized 2-[2-(acetyl-amino)-4-(diethylamino)-5-methoxyphenyl]-5-amino-7-bromo-4-chloro-2H-benzotriazole (PBTA-7) and 2-[2-(acetylamino)-4-(diallylamino)-5-methoxyphenyl]-5-amino-7-bromo-4-chloro-2H-benzotriazole (PBTA-8) from Disperse Blue 291 and Disperse Blue 373, respectively, by reduction with iron powder and subsequent chlorination with sodium hypochlorite. Both PBTA-7 and PBTA-8 exerted strong mutagenicity in Salmonella typhimurium TA98 and YG1024 in the presence of S9 mix (43 000 and 1 430 000 revertants/nmol for PBTA-7 and 40 700 and 2 213 000 revertants/nmol for PBTA-8 in TA98 and YG1024). To clarify whether PBTA-7 and PBTA-8 exist in the environment, water samples were collected at seven sites in six rivers flowing through two different regions where textile dyeing industries are located. All water samples were mutagenic in Salmonella typhimurium YG1024 with S9 mix and their potencies ranged from 108 000 to 1 990 000 revertants/g blue rayon. PBTA-7 and PBTA-8 were detected in water samples from both regions at levels of 0.1-101.4 ng/g blue rayon and 0.1-48.9 ng/g blue rayon, respectively. In some samples PBTA-7 and PBTA-8 could contribute up to 15% of the water mutagenicity.