Orange Ⅳ Indicator - 0.5% , CAS No.554-73-4

CAS: 554-73-4 Cat. No.: O299256 Molecular Weight: 375.38 EC Number: 209-071-4
AVAILABLE TO ORDER
GRADE & PURITY 0.5%
Synonyms
Tropaeolin OO|554-73-4|Orange IV|OrangeIV|Acid Orange 5|Diphenylamine Orange|C.I. Acid Orange 5|Orange GS|C.I. 13080|Tropeolin OO|Orange N|Solar Orange IV|Acid Yellow D|Orange 4 Lake|Hispacid Orange IV|Tertracid Orange IV|VR8Q3R288W|sodium;4-[(4-anilinoph
Storage
Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
100ml
O299256-100ml
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$26.90

$31.90
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Why this grade

0.5% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 5 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
Tropaeolin OO | 554-73-4 | Orange IV | OrangeIV | Acid Orange 5 | Diphenylamine Orange | C.I. Acid Orange 5 | Orange GS | C.I. 13080 | Tropeolin OO | Orange N | Solar Orange IV | Acid Yellow D | Orange 4 Lake | Hispacid Orange IV | Tertracid Orange IV | VR8Q3R288W | sodium;4-[(4-anilinoph
Specifications & Purity
0.5%
Storage
Room temperature
Shipped In
Normal
Names and Identifiers
Canonical SmilesC1=CC=C(C=C1)NC2=CC=C(C=C2)N=NC3=CC=C(C=C3)S(=O)(=O)[O-].[Na+]
IUPAC Namesodium;4-[(4-anilinophenyl)diazenyl]benzenesulfonate
InChIKeyMLVYOYVMOZFHIU-UHFFFAOYSA-M
INCHI1S/C18H15N3O3S.Na/c22-25(23,24)18-12-10-17(11-13-18)21-20-16-8-6-15(7-9-16)19-14-4-2-1-3-5-14;/h1-13,19H,(H,22,23,24);/q;+1/p-1
Isomeric SMILES C1=CC=C(C=C1)NC2=CC=C(C=C2)N=NC3=CC=C(C=C3)S(=O)(=O)[O-].[Na+]
Molecular Weight 375.38
Reaxy-Rn 3831566
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=3831566&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

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✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassAzobenzenes
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentAzobenzenes
Alternative Parents Benzenesulfonic acids and derivatives  Benzenesulfonyl compounds  1-sulfo,2-unsubstituted aromatic compounds  Aniline and substituted anilines  Primary aromatic amines  Sulfonyls  Organosulfonic acids  Azo compounds  Secondary amines  Propargyl-type 1,3-dipolar organic compounds  Organic sodium salts  Organic oxides  Hydrocarbon derivatives  Organic cations  
Molecular FrameworkAromatic homomonocyclic compounds
Substituents Azobenzene - Benzenesulfonate - Arylsulfonic acid or derivatives - 1-sulfo,2-unsubstituted aromatic compound - Benzenesulfonyl group - Aniline or substituted anilines - Monocyclic benzene moiety - Benzenoid - Primary aromatic amine - Organic sulfonic acid or derivatives - Organosulfonic acid or derivatives - Sulfonyl - Organosulfonic acid - Azo compound - Organic alkali metal salt - Organic 1,3-dipolar compound - Propargyl-type 1,3-dipolar organic compound - Secondary amine - Organic sodium salt - Organic nitrogen compound - Organic oxygen compound - Organic oxide - Hydrocarbon derivative - Organosulfur compound - Organonitrogen compound - Organic salt - Amine - Organic cation - Aromatic homomonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as azobenzenes. These are organonitrogen aromatic compounds that contain a central azo group, where each nitrogen atom is conjugated to a benzene ring.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:
Chemical and Physical Properties
Molecular Weight375.400 g/mol
XLogP3
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count6
Rotatable Bond Count5
Exact Mass375.065 Da
Monoisotopic Mass375.065 Da
Topological Polar Surface Area102.000 Ų
Heavy Atom Count26
Formal Charge0
Complexity530.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count2
Documents & Articles
Citations of This Product
References
1. Hua Lin, Kaiwei Chen, Linlin Du, Peng Gao, Junli Zheng, Yuanli Liu, Lili Ma.  (2022)  Efficient and selective adsorption of methylene blue and methyl violet dyes by yellow passion fruit peel.  ENVIRONMENTAL TECHNOLOGY,      [PMID:33944677] [10.1080/09593330.2021.1924288]
2. Wenbo Liu, Chuanbin Fan, Ziao Zong, Nana Li, Kaixuan Ma, Bin Zhu, Xia Zhang, Yuhua Fan.  (2020)  Two Co(Ⅱ)-based metal organic frameworks for highly efficient removal of azo dyes from aqueous environment: Synthesis, selective adsorption and adsorption mechanism.  COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,      [PMID:] [10.1016/j.colsurfa.2020.125236]
3. Fangke Yu, Yang Chen, Yuwei Pan, Yang Yang, Hongrui Ma.  (2020)  A cost-effective production of hydrogen peroxide via improved mass transfer of oxygen for electro-Fenton process using the vertical flow reactor.  SEPARATION AND PURIFICATION TECHNOLOGY,      [PMID:] [10.1016/j.seppur.2020.116695]
4. Huan Wang, Yinmao Wei.  (2017)  Magnetic graphene oxide modified by chloride imidazole ionic liquid for the high-efficiency adsorption of anionic dyes.  RSC Advances,  (15): (9079-9089).  [PMID:] [10.1039/C6RA27530C]
5. Yan Fu, Nan Lyu, Xia Tang, Ying Wang, Xiaohui Mou, Wentai Zhang, Siwei Yin, Mu Li, Na Bai, Nan Huang, Xin Li, Yifeng Lei, Jun Hou, Zhilu Yang.  (2025)  Glutathione peroxidase mimic-engineered α-lactalbumin self-assembling coatings tailor immunomodulatory vascular stents for suppressing restenosis.  Bioactive Materials,      [PMID:41438204] [10.1016/j.bioactmat.2025.11.042]
Solution Calculators
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