Basic information Safety Supplier Related
ChemicalBook >  Product Catalog >  Dyes and Pigments >  dye >  Acid dye >  Acid Orange 7

Acid Orange 7

Basic information Safety Supplier Related

Acid Orange 7 Basic information

Product Name:
Acid Orange 7
Synonyms:
  • Golden Orange Ⅱ
  • Orange II sod
  • Orange II, Pure
  • ORANGE1
  • ORANGE I
  • NAPHTHOL ORANGE
  • TROPAEOLIN 000 NO 1
  • TROPAEOLIN OOO-1
CAS:
633-96-5
MF:
C16H13N2NaO4S
MW:
352.34
EINECS:
211-199-0
Product Categories:
  • Organics
  • Azo
Mol File:
633-96-5.mol
More
Less

Acid Orange 7 Chemical Properties

Melting point:
164°C
Density 
1.525[at 20℃]
vapor pressure 
0Pa at 25℃
storage temp. 
Amber Vial, -20°C Freezer, Under inert atmosphere
solubility 
Very soluble in water; very slightly soluble in ethanol
pka
8.26, 11.4(at 25℃)
Colour Index 
15510
form 
Crystalline Powder
color 
Green to blue
PH Range
Amber (7.4) to orange (8.6);Orange (10.2) to red (11.8)
Odor
Odorless
Water Solubility 
116 g/L (30 ºC)
λmax
483nm
Merck 
14,6858
BRN 
3898201
Stability:
Light Sensitive
Biological Applications
Cosmetics; wound dressing materials
Major Application
Organic light emitting diodes (OLEDs), nanoparticles, inks, wood preservatives, textiles, hair dyes, cosmetics, wound dressing materials, biofuel cells
LogP
-0.95 at 20℃
CAS DataBase Reference
633-96-5(CAS DataBase Reference)
EPA Substance Registry System
C.I. Acid Orange 7, monosodium salt (633-96-5)
More
Less

Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36-37/39
WGK Germany 
3
RTECS 
DB7084000
HS Code 
32041200

MSDS

More
Less

Acid Orange 7 Usage And Synthesis

Chemical Properties

Orange-red powder

Uses

Acid Orange 7 (CAS# 633-96-5) is an environmental pollutant.

Definition

ChEBI: Acid orange 7 is a member of naphthalenes. Orange allergenic extract is used in allergenic testing.

Preparation

Acid Orange 7, commonly known as acidic orange II. 4-Aminobenzenesulfonic acid diazo, and Naphthalen-2-ol coupling. It is produced by azo coupling of β-naphthol and diazonium derivative of sulfanilic acid.

Flammability and Explosibility

Non flammable

Properties and Applications

red light orange. Golden yellow powder. Soluble in water is red light yellow, orange soluble in alcohol. The strong sulfuric acid for quality in red, dilute create tan precipitation; In a golden of nitric acid; In the thick of sodium hydroxide solution not dissolve. Its water solution with hydrochloric acid generation tan precipitation; Add sodium hydroxide solution brown. In dyeing copper ions trend dark red in colour and lustre of iron ion shallow and dark. Discharge the gender is good. Mainly used for silk and wool dyeing, widely used in wool dyeing, can be used for wool, silk and polyamide fiber fabric of direct printing, leather and paper color, can also be used in indicator and biological shading. Is tasted can be used as a food dye, heavy metal salt used in organic pigments.

Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater
Fading Stain Fading Stain Fading Stain
ISO 4 1 2 2-3 1 2 2 1
AATCC 5 1-2 1-2 1 1 1 3 3

Purification Methods

Purification is as for Orange I. Its solubility in H2O is 40g/L at 25o. [Müller et al. Helv Chim Acta 35 2579 1952.] Also purify it by extracting it with a small volume of cold water, then crystallising it by dissolving in boiling water, cooling to ca 80o, adding two volumes of EtOH and cooling. When cold, the precipitate is filtered off, washed with a little EtOH and dried in air. It can be salted out from aqueous solution with sodium acetate, then repeatedly extracted with EtOH. Meggy and Sims [J Chem Soc 2940 1956], after crystallising the sodium salt twice from water, dissolved it in cold water (11mL/g) and added conc HCl to precipitate the acid dye which was separated by centrifugation, redissolved and again precipitated with acid. After washing the precipitate three times with 0.5M acid, it was dried over NaOH, recrystallised twice from absolute EtOH, washed with a little Et2O, dried over NaOH and stored over conc H2SO4 in the dark. It can then be converted to the pure salt with the calculated amount of NaOH or Na2CO3. [Beilstein 16 IV 408.]

Acid Orange 7Supplier

J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Email
jkinfo@jkchemical.com
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
4006608290; 18621169109
Email
market03@meryer.com
TCI (Shanghai) Development Co., Ltd.
Tel
021-67121386
Email
Sales-CN@TCIchemicals.com
Energy Chemical
Tel
021-021-58432009 400-005-6266
Email
sales8178@energy-chemical.com
Beijing Ouhe Technology Co., Ltd
Tel
010-82967028 13552068683
Email
2355560935@qq.com