Tropeolin OOO, indicator

Name: Tropeolin OOO, indicator
Brand: Vaqora Chemicals
SKU: VQ-000423

About Tropeolin OOO, indicator

Listed under CAS 633-96-5, Tropeolin OOO, indicator is an indicator available from Vaqora Chemicals. Its molecular formula is C16H11N2NaO4S and its molecular weight is 350.3 g/mol. Systematically, it is named sodium 4-[(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate. Alternative names: Acid Orange A and Acid Orange 7.

In its supplied form it is an orange powder. Store in a tightly closed container in a cool, dry and well-ventilated place. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Key uses span titration end-point detection, pH determination and analytical testing. Our customers for this product work in academic and industrial research.

Vaqora Chemicals supplies Tropeolin OOO, indicator in 25 g, 100 g, 1 kg and 25 kg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Titration end-point detection
pH determination
Analytical testing

Industries

Specifications & identifiers

Chemical identifiers
Product name	Tropeolin OOO, indicator
Catalogue No.	VQ-000423
CAS Number	633-96-5
IUPAC name	sodium 4-[(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate
Molecular formula	C₁₆H₁₁N₂NaO₄S
Molecular weight	350.3 g/mol
Exact mass	350.0337
HSN code	32129090
InChIKey	CQPFMGBJSMSXLP-UHFFFAOYSA-M
SMILES	C1=CC=C2C(=C1)C=CC(=C2N=NC3=CC=C(C=C3)S(=O)(=O)[O-])O.[Na+]
PubChem CID	135442941

Physical properties
Physical form	Powder
Appearance	Orange powder
H-bond donors / acceptors	1 / 6
TPSA	111 Å²
Synonyms	4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt, Acid Orange A, Acid Orange 7, Orange II, Tropaeolin 000 No. 2, C.I. Acid Orange 7, 2-naphthol orange, 4-((2-Hydroxy-1-naphthalenyl)azo)benzenesulfonic acid monosodium salt, beta-naphthol orange, AO-7 dye, Acid Orange, Orange II sodium salt

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, P305 + P351 + P338

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

Other grades of CAS 633-96-5

Microscopy

Acid orange II

CAS: 633-96-5
Formula: C₁₆H₁₁N₂NaO₄S
MW: 350.3 g/mol

VQ-000447

Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90%

CAS: 633-96-5
Formula: C₁₆H₁₁N₂NaO₄S
MW: 350.3 g/mol

VQ-000422

Frequently asked questions

What is the CAS number of Tropeolin OOO, indicator?

The CAS Registry Number of Tropeolin OOO, indicator is 633-96-5. It is also known as 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt, Acid Orange A, Acid Orange 7.

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

Tropeolin OOO, indicator has the molecular formula C16H11N2NaO4S and a molecular weight of 350.3 g/mol. Its IUPAC name is sodium 4-[(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate.

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

We supply Tropeolin OOO, 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 OOO, indicator?

Yes. Every lot of Tropeolin OOO, 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 OOO, indicator be shipped internationally?

Yes. Tropeolin OOO, 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.