6471-49-4

Basic information

• Product Name: Pigment Red 23
• Synonyms: pigment red 23;3-Hydroxy-4-[(2-methoxy-5-nitrophenyl)azo]-N-(3-nitrophenyl)naphthalene-2-carboxamide;C.I. 12355;NAPTHOL RED BLUE SHADE;Irgalite Red;2-Naphthalenecarboxamide, 3-hydroxy-4-(2-methoxy-5-nitrophenyl)azo-N-(3-nitrophenyl)-;2-Naphthalenecarboxamide, 4-5-(aminocarbonyl)-2-methoxyphenylazo-3-hydroxy-N-phenyl-;CIPIGMENT23
• CAS NO: 6471-49-4
• Molecular Formula: C24H17N5O7
• Molecular Weight: 487.43
• EINECS: 229-313-2
• Product Categories: Dyes and Pigments;Organics
• Mol File: 6471-49-4.mol
• Article Data: 0

Chemical Properties

• Melting Point: 330-340°C
• Boiling Point: 583.02°C (rough estimate)
• Flash Point: 372.8 °C
• Appearance: red powder
• Density: 1.4576 (rough estimate)
• Vapor Pressure: 0Pa at 25℃
• Refractive Index: 1.7500 (estimate)
• Storage Temp.: Amber Vial, -20°C Freezer
• Solubility: Basic DMSO (Slightly), DMSO (Very Slightly), Methanol (Slightly)
• PKA: 11.07±0.70(Predicted)
• Water Solubility: <0.1 g/100 mL at 22℃
• Stability: Stable, but light sensitive. Incompatible with strong oxidizing agents.
• CAS DataBase Reference: Pigment Red 23(CAS DataBase Reference)
• NIST Chemistry Reference: Pigment Red 23(6471-49-4)
• EPA Substance Registry System: Pigment Red 23(6471-49-4)

Safety Data

• Hazardous Substances Data: 6471-49-4(Hazardous Substances Data)

Usage

Chemical Properties

red powder

General Description

Red to bluish red powder.

Air & Water Reactions

Azo dyes can be explosive when suspended in air at specific concentrations. Insoluble in water.

Reactivity Profile

Pigment Red 23 is sensitive to light and may be sensitive to heat. Pigment Red 23 is incompatible with strong oxidizing agents. . Pigment Red 23 is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class 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. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.

Fire Hazard

Flash point data for Pigment Red 23 are not available. Pigment Red 23 is probably combustible.

Flammability and Explosibility

Notclassified

Properties and Applications

TEST ITEMS SPECIFICATION APPEARANCE RED POWDER SHADE YELLOWISH HEAT RESISTANCE 140 °C min LIGHT FASTNESS 6~7 ACID RESISTANCE 5 ALKALI RESISTANCE 4 FASTNESS TO BLEEDING 4 OIL ABSORPTION 40-50% SPECIFIC SURFACE 28 m 2 /g DENSITY 1.40 g/cm 3 RESIDUE ON 80 MESH 5.0% max WATER SOLUBLE 1.0% max VOLATITE 105 °C 1.0% max TINTING STRENGTH 100-105 %

TEST ITEMS

SPECIFICATION

APPEARANCE

RED POWDER

SHADE

YELLOWISH

ACID RESISTANCE

5

ALKALI RESISTANCE

4

FASTNESS TO BLEEDING

4

OIL ABSORPTION

40-50%

SPECIFIC SURFACE

28 m 2 /g

DENSITY

1.40 g/cm 3

RESIDUE ON 80 MESH

5.0% max

WATER SOLUBLE

1.0% max

VOLATITE 105 °C

1.0% max

TINTING STRENGTH

100-105 %

InChI:InChI=1/C24H17N5O7/c1-36-21-10-9-17(29(34)35)13-20(21)26-27-22-18-8-3-2-5-14(18)11-19(23(22)30)24(31)25-15-6-4-7-16(12-15)28(32)33/h2-13,26H,1H3,(H,25,31)/b27-22+