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VAQORAThorin, GR
Synonyms: 1-(2-Arsonophenylazo)-2-naphthol-3,6-disulfonic acid disodium salt · 2-(2-Hydroxy-3,6-disulfo-1-naphthylazo)phenylarsonic acid disodium salt · 2-(3,6-Disulfo-2-hydroxy-1-naphthylazo)benzenearsonic acid disodium salt · APANS
CAS No.3688-92-4
FormulaC16H11AsN2Na2O10S2
Mol. weight576.30
Catalogue No.VQ-000412
PurityAR
HSN29319090
Thorin (CAS 3688-92-4) – indicator, AR grade. C16H11AsN2Na2O10S2, MW 576.3. Get a quote from Vaqora Chemicals, COA included, shipped worldwide.
Batch COA with every lot
16-section GHS SDS
Export to 120+ countries
DG-compliant packing
About Thorin, GR
Vaqora Chemicals supplies Thorin (AR grade), an indicator registered under CAS number 3688-92-4. With the molecular formula C16H11AsN2Na2O10S2, it has a molar mass of 576.3 g/mol. The IUPAC name is disodium, 4-[(2-arsonophenyl)diazenyl]-3-hydroxynaphthalene-2,7-disulfonate. Common synonyms include APANS and Thoron(ol).
It is supplied as a dark red to very dark red to maroon powder. Key physical data: a melting point of above 300 °C. Solubility: soluble in water. Store in a tightly closed container in a cool, dry and well-ventilated place. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.
Key uses span titration end-point detection, pH determination, analytical testing and indicator for titrations. Our customers for this product work in academic and industrial research.
Standard pack sizes are 1 g, 5 g and 1 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
Grade guides
Specifications & identifiers
| Product name | Thorin, GR |
|---|---|
| Catalogue No. | VQ-000412 |
| CAS Number | 3688-92-4 |
| IUPAC name | disodium;4-[(2-arsonophenyl)diazenyl]-3-hydroxynaphthalene-2,7-disulfonate |
| Molecular formula | C16H11AsN2Na2O10S2 |
| Molecular weight | 576.3 g/mol |
| Exact mass | 575.8866 |
| Grade | AR |
| HSN code | 29319090 |
| InChIKey | DCSRPHQBFSYJNN-UHFFFAOYSA-L |
| SMILES | C1=CC=C(C(=C1)N=NC2=C3C=CC(=CC3=CC(=C2O)S(=O)(=O)[O-])S(=O)(=O)[O-])[As](=O)(O)O.[Na+].[Na+] |
| PubChem CID | 77269 |
| Physical form | Powder |
|---|---|
| Appearance | Dark red to very dark red to maroon powder |
| Melting point | >300 °C |
| Solubility | Soluble in water |
| H-bond donors / acceptors | 3 / 12 |
| TPSA | 234 Ų |
| UN number | UN 3465 |
| Synonyms | 1-(2-Arsonophenylazo)-2-naphthol-3,6-disulfonic acid disodium salt, 2-(2-Hydroxy-3,6-disulfo-1-naphthylazo)phenylarsonic acid disodium salt, 2-(3,6-Disulfo-2-hydroxy-1-naphthylazo)benzenearsonic acid disodium salt, APANS, Thoron(ol), Disodium 4-((o-arsonophenyl)azo)-3-hydroxynaphthalene-2,7-disulphonate, 4-((2-Arsonophenyl)azo)-3-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt, Disodium 4-[(o-arsonophenyl)azo]-3-hydroxynaphthalene-2,7-disulphonate, 2,7-Naphthalenedisulfonic acid, 4-[(2-arsonophenyl)azo]-3-hydroxy-, disodium salt, Thorin I, Indicator Grade, 2,7Naphthalenedisulfonic acid, 4(2arsonophenyl)azo3hydro, 4((2Arsonophenyl)azo)3hydroxy2,7naphthalenedisulfonic acid |
Safety & hazard information (GHS)
Signal word: Danger
Hazard statements
H301Toxic if swallowedH331Toxic if inhaledH400Very toxic to aquatic lifeH410Very toxic to aquatic life with long lasting effects
Precautionary statements: P261, P264, P270, P271, P273, P301 + P316, P304 + P340, P316, P321, P330, P391, 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
Frequently asked questions
What is the CAS number of Thorin, GR?
The CAS Registry Number of Thorin, GR is 3688-92-4. It is also known as 1-(2-Arsonophenylazo)-2-naphthol-3,6-disulfonic acid disodium salt, 2-(2-Hydroxy-3,6-disulfo-1-naphthylazo)phenylarsonic acid disodium salt, 2-(3,6-Disulfo-2-hydroxy-1-naphthylazo)benzenearsonic acid disodium salt.
What is the molecular formula and molecular weight of Thorin, GR?
Thorin, GR has the molecular formula C16H11AsN2Na2O10S2 and a molecular weight of 576.3 g/mol.
Which grade and pack sizes of Thorin, GR can I order?
We supply Thorin, GR in AR grade, in 1 g, 5 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.
Do you provide a COA and SDS with Thorin, GR?
Yes. Every lot of Thorin, GR 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 Thorin, GR be shipped internationally?
Yes. Thorin, GR is classified as hazardous (UN 3465), 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.
Enquire about Thorin, GR
We reply within one business day with price, pack options, lead time and documentation.
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