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Acid Orange 7

Acid Orange 7 Structure
Acid Orange 7
  • CAS No.633-96-5
  • Chemical Name:Acid Orange 7
  • CBNumber:CB0144029
  • Molecular Formula:C16H11N2NaO4S
  • Formula Weight:350.32
  • MOL File:633-96-5.mol
Acid Orange 7 Property
  • Melting point: :164°C
  • solubility  :Solubility Very soluble in water; very slightly soluble in ethanol
  • Colour Index  :15510
  • form  :Crystalline Powder
  • pka :8.26, 11.4(at 25℃)
  • 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
  • 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
  • CAS DataBase Reference :633-96-5(CAS DataBase Reference)
  • FDA 21 CFR :74.1254; 74.2254; 82.1254
  • EWG's Food Scores :2-5
  • EPA Substance Registry System :C.I. Acid Orange 7, monosodium salt (633-96-5)
Safety
  • Hazard Codes  :Xi
  • Risk Statements  :36/37/38
  • Safety Statements  :26-36-37/39
  • WGK Germany  :3
  • RTECS  :DB7084000
  • HS Code  :32041200
Hazard and Precautionary Statements (GHS)
  • Symbol(GHS)
  • Signal wordWarning
  • Hazard statements H315-H319
  • Precautionary statements P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313
Acid Orange 7 Price More Price(8)
  • Brand: Sigma-Aldrich
  • Product number: 195235
  • Product name : Orange II sodium salt
  • Purity: (Certified by the Biological Stain Commission), Dye content ≥85%
  • Packaging: 25g
  • Price: $40
  • Updated: 2021/03/22
  • Buy: Buy
  • Brand: Sigma-Aldrich
  • Product number: 195235
  • Product name : Orange II sodium salt
  • Purity: (Certified by the Biological Stain Commission), Dye content ≥85%
  • Packaging: 100g
  • Price: $131
  • Updated: 2021/03/22
  • Buy: Buy
  • Brand: TCI Chemical
  • Product number: G0158
  • Product name : Acid Orange 7
  • Purity: >97.0%(HPLC)
  • Packaging: 25g
  • Price: $30
  • Updated: 2021/03/22
  • Buy: Buy
  • Brand: TCI Chemical
  • Product number: G0158
  • Product name : Acid Orange 7
  • Purity: >97.0%(HPLC)
  • Packaging: 100g
  • Price: $74
  • Updated: 2021/03/22
  • Buy: Buy
  • Brand: Sigma-Aldrich
  • Product number: 75370
  • Product name : Orange II sodium salt
  • Purity: for microscopy (Hist.), indicator (pH 11.0-13.0)
  • Packaging: 100g
  • Price: $89.8
  • Updated: 2021/03/22
  • Buy: Buy

Acid Orange 7 Chemical Properties,Usage,Production

  • Chemical Properties Orange-red powder
  • Preparation commonly known as acidic orange II. ?4-Aminobenzenesulfonic acid?diazo, and Naphthalen-2-ol coupling.
  • 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 7 Preparation Products And Raw materials
Raw materials
Preparation Products
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