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HomeProduct name listOrange IV

Orange IV

  • CAS NO.:554-73-4
  • Empirical Formula: C18H16N3NaO3S
  • Molecular Weight: 377.39
  • MDL number: MFCD00038130
  • EINECS: 209-071-4
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-04-23 13:52:06
Orange IV Structural

What is Orange IV?

Chemical properties

yellow-brown or orange powder

The Uses of Orange IV

As indicator. pH: red 1.4 to yellow 2.6.

Preparation

ommonly known as acidic orange IV. 4-Aminobenzenesulfonic acid diazo, with Diphenylamine coupling.

Purification Methods

Recrystallise it twice from water [Kolthoff & Gus J Am Chem Soc 60 2516 1938]. [Beilstein 16 II 171.]

Properties and Applications

yellow orange. Soluble in water and ethanol for orange, slightly soluble in ethyl ether, insoluble in benzene. The strong sulfuric acid is purple, dilute appears after the purple precipitation. In water solution to join hydrochloric acid appear purple precipitation; With sodium hydroxide appear yellow precipitation. Used for wool, silk, cotton, vinegar fiber etc fiber dyeing. Can also be used to indicator, paper, soap kind, straw and leather color. Good levelness, discharge sex medium, dyeing encounter copper, iron ion color shade darker.

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

Properties of Orange IV

Melting point: >300°C
storage temp.  Inert atmosphere,Room Temperature
solubility  Solubility Soluble in water, ethanol
form  Powder
Colour Index  13080
pka 2.0(at 25℃)
color  S. No.: 179
PH Range 1.3(red)-3.2(yellow)
λmax 527nm, 443nm
Merck  14,9776
Stability: Stable. Incompatible with strong oxidizing agents.
Major Application Sensors, lithographic plates, optical recording media, photoreceptor, inks, indication system for product exceeding threshold temperature, lubricants, textiles, food storage, determination of amiodarone, astemizole, bromhexine, clomipramine, deutiforin, domperidone, fluoroquinolone, roxithromycin, terfenadine, thiabendazole, antihistamines
CAS DataBase Reference 554-73-4(CAS DataBase Reference)
EPA Substance Registry System Benzenesulfonic acid, 4-[[4-(phenylamino)phenyl]azo]-, monosodium salt (554-73-4)

Safety information for Orange IV

Signal word Warning
Pictogram(s)
ghs
Flame
Flammables
GHS02
GHS Hazard Statements H228:Flammable solids
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P241:Use explosion-proof electrical/ventilating/lighting/…/equipment.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P370+P378:In case of fire: Use … for extinction.

Computed Descriptors for Orange IV

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