2425-85-6

Basic information

• Product Name: Pigment Red 3
• Synonyms: ((4-Methyl-2-nitrophenyl)azo)-2-naphthol;1-((2-nitro-4-methylphenyl)azo)-2-naphthol;1-((4-methyl-2-nitrophenyl)azo)-2-naphthaleno;1-((4-methyl-2-nitrophenyl)azo)-2-naphthalenol;1-(o-nitro-p-tolylazo)-2-naphthol;1-[(4-methyl-2-nitrophenyl)azo]-2-naphthaleno;Accosperse Toluidine Red XL;accospersetoluidineredxl
• CAS NO: 2425-85-6
• Molecular Formula: C₁₇H₁₃N₃O₃
• Molecular Weight: 307.3
• EINECS: 219-372-2
• Product Categories: Organics
• Mol File: 2425-85-6.mol
• Article Data: 3

Chemical Properties

• Melting Point: 270-272 °C(lit.)
• Boiling Point: 447.81°C (rough estimate)
• Flash Point: 282.5 °C
• Appearance: red to orange powder
• Density: 1.1873 (rough estimate)
• Vapor Pressure: 8.02E-10mmHg at 25°C
• Refractive Index: 1.6500 (estimate)
• PKA: 13.45±0.50(Predicted)
• Water Solubility: 211μg/L at 20℃
• Stability: Stable. May be moisture sensitive. Incompatible with strong oxidizing agents.
• CAS DataBase Reference: Pigment Red 3(CAS DataBase Reference)
• NIST Chemistry Reference: Pigment Red 3(2425-85-6)
• EPA Substance Registry System: Pigment Red 3(2425-85-6)

Safety Data

• Hazard Codes: Xi,N
• Statements: 41-50/53
• Safety Statements: 26-39-60-61
• RIDADR: UN 3077 9/PG 3
• WGK Germany: 3
• RTECS: QK4247000
• Hazardous Substances Data: 2425-85-6(Hazardous Substances Data)

Usage

Description

Pigment Red 3 is a synthetic organic pigment that is characterized by its dark red powder appearance and a bluish shade. It has a heat resistance of at least 140°C and exhibits good light fastness with a rating of 7. The pigment also has moderate resistance to acids and alkalis, with a rating of 5 for both. It has a fastness to bleeding rating of 4 and an oil absorption rate of 40-45%. The specific surface area of Pigment Red 3 is 28 m2/g, and it has a density of 1.60 g/cm3. The pigment has a maximum water solubility of 1.0% and a maximum residue on an 80 mesh screen of 5.0%. The tinging strength of Pigment Red 3 is between 100-105%.

Uses

Used in the Plastics Industry:
Pigment Red 3 is used as a colorant for plastics due to its high heat resistance and good light fastness. Its bluish shade and strong tinging strength make it suitable for coloring a variety of plastic products.
Used in the Paints and Coatings Industry:
Pigment Red 3 is used as a pigment in the formulation of paints and coatings. Its moderate acid and alkali resistance, along with its good light fastness, make it a suitable choice for various types of paint and coating applications.
Used in the Printing Ink Industry:
Pigment Red 3 is used in the production of printing inks due to its strong color strength and resistance to various environmental factors. Its bluish shade and good light fastness make it a popular choice for printing on various substrates.
Used in the Textile Industry:
Pigment Red 3 is used as a dye for coloring textiles. Its moderate resistance to acids and alkalis, along with its good light fastness, make it suitable for use in various textile applications, including fabrics, yarns, and fibers.
Used in the Rubber Industry:
Pigment Red 3 is used as a colorant for rubber products. Its high heat resistance and good light fastness make it an ideal choice for coloring rubber products that are exposed to high temperatures and sunlight.

Air & Water Reactions

Sensitive to moisture Dust suspensions in air can be explosive at certain concentrations. Insoluble in water.

Reactivity Profile

Pigment Red 3 may form toxic gases with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. May form flammable gases with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.

Fire Hazard

Flash point data for Pigment Red 3 are not available; however, Pigment Red 3 is probably combustible.

Flammability and Explosibility

Nonflammable

TEST ITEMS

SPECIFICATION

HEAT RESISTANCE

140 °C min

LIGHT FASTNESS

7

ACID RESISTANCE

5

ALKALI RESISTANCE

5

FASTNESS TO BLEEDING

4

OIL ABSORPTION

40-45%

SPECIFIC SURFACE

28 m 2 /g

DENSITY

1.60 g/cm 3

RESIDUE ON 80 MESH

5.0% max

VOLATITE 105 °C

1.0% max

InChI:InChI=1/C17H13N3O3/c1-11-6-8-14(15(10-11)20(22)23)18-19-17-13-5-3-2-4-12(13)7-9-16(17)21/h2-10,18H,1H3/b19-17-

Upstream product

• 108-88-3 toluene 
• 135-19-3 β-naphthol 
• 89-62-3 4-methyl-2-nitroaniline 

Relevant articles and documents

Method used for synthesizing azo compound using solid particle one kettle method

The invention relates to a method used for synthesizing an azo compound using solid particle one kettle method. The method comprises following steps: solid particles are introduced into a reaction container, an inorganic acid, an aromatic primary amine, sodium nitrite, water, and a coupling component are added, mechanism stirring is carried out, when the reaction is monitored to be finished, filtering and rinsing are carried out, and the obtained filter cake is a finished product; or the solid particles are introduced into the reaction container, the inorganic acid, the aromatic primary amine,sodium nitrite, and water are added, mechanical stirring is carried out, after complete conversion of the aromatic primary amine, the coupling component is added, mechanical stirring is carried out,when the reaction is monitored to be finished, filtering and rinsing are carried out, and the obtained filter cake is a finished product. The solid particles are preferably selected from polytetrafluoroethylene particles, haw seeds, or stainless steel sand. The solid particles are added into the reaction system to promote reaction, no pre-heating or alkali adding dissolving of diazo components orthe coupling component is needed; most reaction is finished in 1h; reaction time is short; product quality is high; and reaction filtrate and excess inorganic acid can be recycled for a plurality of times.