Tropeolin OO, indicator

Name: Tropeolin OO, indicator
Brand: Vaqora Chemicals
SKU: VQ-000421

About Tropeolin OO, indicator

Vaqora Chemicals supplies Tropeolin OO, indicator, an indicator registered under CAS number 554-73-4. Its molecular formula is C18H14N3NaO3S and its molecular weight is 375.4 g/mol. Its systematic (IUPAC) name is sodium 4-[(4-anilinophenyl)diazenyl]benzenesulfonate. It is also known as Orange IV or Tropaeolin OO.

The material typically appears as a brown to orange powder. Solubility: soluble in water. Keep the container tightly sealed and store it in a cool, dry area. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

Typical applications include titration end-point detection, pH determination, analytical testing and indicator for titrations. It is used across academic and industrial research.

Standard pack sizes are 25 g, 100 g, 1 kg and 25 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Titration end-point detection
pH determination
Analytical testing
Indicator for titrations

Industries

Specifications & identifiers

Chemical identifiers
Product name	Tropeolin OO, indicator
Catalogue No.	VQ-000421
CAS Number	554-73-4
IUPAC name	sodium 4-[(4-anilinophenyl)diazenyl]benzenesulfonate
Molecular formula	C₁₈H₁₄N₃NaO₃S
Molecular weight	375.4 g/mol
Exact mass	375.0654
HSN code	32129090
InChIKey	MLVYOYVMOZFHIU-UHFFFAOYSA-M
SMILES	C1=CC=C(C=C1)NC2=CC=C(C=C2)N=NC3=CC=C(C=C3)S(=O)(=O)[O-].[Na+]
PubChem CID	23668839

Physical properties
Physical form	Powder
Appearance	Brown to orange powder
Solubility	Soluble in water
H-bond donors / acceptors	1 / 6
TPSA	102 Å²
Synonyms	4-[(4-Anilinophenyl)azo]benzenesulfonic acid sodium salt, Orange IV, Tropaeolin OO, Acid Orange 5, Diphenylamine Orange, C.I. Acid Orange 5, Orange GS, Tropaeolin, Orange N, Solar Orange IV, Acid Yellow D, Orange 4 Lake

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Tropeolin OO, indicator?

The CAS Registry Number of Tropeolin OO, indicator is 554-73-4. It is also known as 4-[(4-Anilinophenyl)azo]benzenesulfonic acid sodium salt, Orange IV, Tropaeolin OO.

What is the molecular formula and molecular weight of Tropeolin OO, indicator?

Tropeolin OO, indicator has the molecular formula C18H14N3NaO3S and a molecular weight of 375.4 g/mol. Its IUPAC name is sodium 4-[(4-anilinophenyl)diazenyl]benzenesulfonate.

Which grade and pack sizes of Tropeolin OO, indicator can I order?

We supply Tropeolin OO, indicator, in 25 g, 100 g, 1 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Tropeolin OO, indicator?

Yes. Every lot of Tropeolin OO, indicator is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Tropeolin OO, indicator be shipped internationally?

Yes. Tropeolin OO, indicator is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.