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: 2025-12-31 14:38:37
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) |
 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
New Products
Paroxetine Impurity G/Paroxetine Related Compound E 1-Aminocyclopentane carbonitrile (RS)-beta-Amino-beta-(4-bromophenyl)propionic acid N,N CARBONYL DIIMIDAZOLE 2-Amino-5-bromo-4-(trifluoromethyl)pyridine（RM for Indian lab) Benzyl (3R,4S)-3-(2-bromoacetyl)-4-ethylpyrrolidine-1-carboxylate (R)-1-Benzyl-3-pyrrolidinecarbonitrile Betahistine EP Impurity C Cyclobenzaprine N-oxide/Citalopram Related Compound E Chlorthalidone Impurity I Carbamazepine EP Impurity G Sumatriptan Succinate USP Related Compound C 2,2'-(5-methyl-1,3-phenylene)-di(2-Methylpropionitrile) 4-Fluorothiophenol 1-methyl amino-2,4-dinitro benzene 5-Methyl-1,3-benzenediacetonitrile (R)-BoroLeu-(+)-Pinanediol-CF3COOH 4-(5-amino-1-methyl-1h-benzoimidazol-2-yl)-butyric acid isopropyl ester. 4-Bromo Benzylcyanide 3-Hydroxypropionitrile valeronitrile 3,4 Dimethoxy Benzylcyanide 3-chlorobenzyl cyanide 2-Chloro BenzylcyanideRelated products of tetrahydrofuran
You may like
-
554-73-4 TROPAEOLIN OO 99%View Details
554-73-4 -
554-73-4 98%View Details
554-73-4 -
Tropeolin OO, indicator CAS 554-73-4View Details
554-73-4 -
Acid Orange 5 CAS 554-73-4View Details
554-73-4 -
TROPAEOLIN OO For Microscopy CAS 554-73-4View Details
554-73-4 -
Bromoacetaldehyde Dimethyl Acetal (stabilized with K2CO3)View Details
7252-83-7 -
157528-56-8 (R)-1-Benzyl-3-pyrrolidinecarbonitrile 98+View Details
157528-56-8 -
157528-56-8 (R)-1-Benzyl-3-pyrrolidinecarbonitrile 98+View Details
157528-56-8
Statement: All products displayed on this website are only used for non medical purposes such as industrial applications or scientific research, and cannot be used for clinical diagnosis or treatment of humans or animals. They are not medicinal or edible.