DISPERSE ORANGE 3 Chemical Properties

Melting point:

~200 °C (dec.)(lit.)

Boiling point:

385.06°C (rough estimate)

Density 

1.2532 (rough estimate)

refractive index 

1.6081 (estimate)

storage temp. 

Refrigerator

solubility 

Chloroform (Very Slightly, Heated, Sonicated), DMSO (Slightly), Methanol (Slightly)

Colour Index 

11005

pka

2.78±0.10(Predicted)

form 

Powder

color 

Red to dark brown

Water Solubility 

290.7ug/L(25 ºC)

BRN 

1842907

CAS DataBase Reference

730-40-5(CAS DataBase Reference)

EPA Substance Registry System

C.I. Disperse Orange 3 (730-40-5)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38-43

Safety Statements 

26-36/37

WGK Germany 

3

HS Code 

32041100

MSDS

• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich

DISPERSE ORANGE 3 Usage And Synthesis

Description

Disperse orange 3 is an azo dye which can induce contact dermatitis in workers in the textile industry. Patch tests are frequently positive (about 30%) in hairdressers with a hand dermatitis. It is probably an indicator of contact sensitization to PPD, but disperse orange 3 can also be found in so me semipermanent hair dyes.

Chemical Properties

red to dark brown powder

Uses

Disperse orange 3 is used as a dye in acetate, nylon, silk, wool, and cotton; stocking dye.

Uses

Disperse Orange 3 may be used as a test material for investigating its degradation by the white rot fungus?Pleurotus ostreatus and the products obtained upon degradation are determined using UV-visible spectrophotometric and high-performance liquid chromatographic techniques.

Preparation

4-Nitrobenzenamine diazo, with aniline base armour sulfonic acid coupling, and sodium hydroxide solution to boil, then a sulfonic acid hydrolysis off base.

Definition

ChEBI: Azobenzene substituted at the phenyl 4-positions by an amino and a nitro group.

General Description

Disperse Orange 3 (DO3) is a monoazo dye, which contains 90% dye content plus dispersing agents and surfactants. It has two aromatic rings with an amino group on one of the rings and the other is substituted with a nitro group. It shows an absorption peak majoring at 415 nm.

Contact allergens

Disperse Orange 3 is an azo dye that can induce contact dermatitis in workers in the textile industry. It is positive in a great majority of PPD-positive people, because of hydrolysis in the skin into PPD. Disperse Orange 3 can also be found in some semipermanent hair dyes.

Properties and Applications

Orange, yellow light red powder, melting point of 210-220 ℃. Soluble in ethanol, acetone, toluene, soluble fiber element. The strong sulfuric acid for green light yellow to orange diluted; Nitric acid solution for orange red; In strong hydrochloric acid for brown in the light yellow. Used for polyester and acetic acid fiber dyeing, also can be used for nylon 66 and acrylic fiber dyeing and plastic shading.

DISPERSE ORANGE 3(730-40-5)Related Product Information

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