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Color Shade

Product Name

Content

Dyeing Depth （%o.w.f）

Fastness Properties

Light

Washing 50℃

Perspiration PH5.5

Perspiration PH8

Hot Pressing 180℃

Rubbing

Change of Shade

Staining

Change of Shade

Staining

Change of Shade

Staining

Change of Shade

Staining

Dry

Wet

Acid Orange II

100%

4.0

4

2-3

3

4-5

3-4

4-5

3

4-5

4-5

4-5

4

Synonyms:C.I. 15510; C.I. Acid Orange 7; C.I. Acid Orange 7, monosodium salt; D & C Orange no. 4; Orange II sodium salt; 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt; Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate; Orange Ⅱ; Acid Orange II Lake; Pigment Orange 17 (15510:1); sodium 4-[(2E)-2-(2-oxonaphthalen-1(2H)-ylidene)hydrazino]benzenesulfonate; sodium 4-[(E)-(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate

Property of Acid Orange II:
Appearance:Orange fine powder
Odor: Odorless
Physical and chemical property: melting point:164°C
Water solubility: 116 g. L (30°C)
Acidity coefficient(pKa): 8.26, 11.4(at 25℃)
Maximum wavelength(λmax): 483nm
Merck : 14,6858
BRN : 3898201
It is yellow in water with red tone and orange in ethanol and magenta in concentrated sulfuric acid. It is diluted to form brown yellow precipitate. The water solution is brown precipitated by hydrochloric acid and dark brown precipitated by sodium hydroxide. When dyeing, it tends to be red and dark when it comes to copper ion, light and dark when it comes to iron ion, with good discharge.

Application:It is mainly used for the dyeing of silk and wool fabrics, as well as leather and paper. Nylon can be dyed in formic acid bath. It can be used for direct printing on wool, silk and nylon. It can also be used as index agent and biological coloring.

Storage:store in a cool and ventilated room.
Quality guarantee period: 36 months.
Packing: 25kgs drum/paper carton/bag