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Indicators, Chelating Agents & Test Papers

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

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Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90% (CAS 633-96-5) supplier Zemixal…

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Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90% chemical structure
CAS number633-96-5
FormulaC16H11N2NaO4S
Molar mass350.3 g/mol
Physical formPowder
HS code32129090
Purity≥90%
InChIKeyCQPFMGBJSMSXLP-UHFFFAOYSA-M
IUPAC namesodium 4-[(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate

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

Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90% sits in our indicators, Chelating Agents & Test Papers section and ships worldwide from stock or short lead time. Identity at a glance (≥90%): CAS 633-96-5, formula C16H11N2NaO4S and molar mass 350.3 g/mol. Typical appearance is orange powder.

Typical applications

  • Titration end-point detection
  • pH determination
  • Analytical testing

Storage and safety notes

It carries the GHS signal word Warning (H315, H319 and H335), so wear gloves and eye protection and work with good ventilation.

Order it in 25 g, 100 g and 1 kg packs or ask for a bulk quotation. Each lot travels with a batch certificate of analysis and a 16-section SDS. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Typical uses

  • Titration end-point detection
  • pH determination
  • Analytical testing

Applications

Research Labs and UniversitiesTextiles, Dyes and Leather

Specifications and identifiers

Specifications of Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90%
Product nameTropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90%
Catalogue numberZX-000422
CAS number633-96-5
IUPAC namesodium 4-[(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate
Molecular formulaC16H11N2NaO4S
Molar mass350.3 g/mol
Exact mass350.0337
Purity / assay≥90%
Physical formPowder
AppearanceOrange powder
H-bond donors / acceptors1 / 6
Topological polar surface area111 Ų
HS code32129090
InChIKeyCQPFMGBJSMSXLP-UHFFFAOYSA-M
SMILESC1=CC=C2C(=C1)C=CC(=C2N=NC3=CC=C(C=C3)S(=O)(=O)[O-])O.[Na+]
PubChem CID135442941
Synonyms4-(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

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

GHS07 Irritant or harmful
Irritant or harmful

Signal word Warning

  • H315Causes skin irritation
  • H319Causes serious eye irritation
  • H335May cause respiratory irritation

Precautionary statements P261, P305 + P351 + P338

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90%
25 gQuoted on request
100 gQuoted on request
1 kgQuoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

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

Which CAS number identifies Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90%?
Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90% is registered under CAS 633-96-5. You may also see it listed as 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt, Acid Orange A, Acid Orange 7. Our catalogue number for this item is ZX-000422.
What are the formula and molar mass of Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90%?
For Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90%, its formula is C16H11N2NaO4S and its molar mass is 350.3 g/mol. The systematic (IUPAC) name is sodium 4-[(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate. InChIKey CQPFMGBJSMSXLP-UHFFFAOYSA-M lets you match it in any structure database.
What grade and pack sizes are available for Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90%?
This listing is ≥90% purity. Standard packs are 25 g, 100 g, 1 kg. Larger quantities and custom packing can be quoted on request.
Which documents come with Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90%?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90% to my country?
Yes. Because Tropeolin OOO (Certified by the Biological Stain Commission), Dye content ≥90% is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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