Thorin

Names
Preferred IUPAC name

Disodium 3-hydroxy-4-[(2-arsonophenyl)diazenyl]naphthalene-2,7-disulfonate

Systematic IUPAC name

Disodium 4-[2-(2-arsonophenyl)hydrazin-1-ylidene]-3-oxo-3,4-dihydronaphthalene-2,7-disulfonate

Other names

Disodium 4-[2-(2-arsonophenyl)hydrazin-1-ylidene]-3-oxonaphthalene-2,7-disulfonate

2-(3,6-Disulfo-2-hydroxy-1-naphthylazo)benzenearsonic acid disodium salt
Thoron

Thoronol

Identifiers

CAS Number

* 3688-92-4 (4E)-4-hydrazin-1-ylidene N

3D model (JSmol)

* Interactive image
* Interactive image

Beilstein Reference

| 2957648
ChemSpider |

* 5020708 (4E)-4-hydrazin-1-ylidene N
* 4895471 N

EC Number |

* 222-993-1

PubChem CID

* 77269
* 6537679 (4E)-4-hydrazin-1-ylidene

UNII |

* LFP7CNK4M5 Y

UN number | 1557

InChI

* InChI=1S/C16H13AsN2O10S2.2Na/c20-16-14(31(27,28)29)8-9-7-10(30(24,25)26)5-6-11(9)15(16)19-18-13-4-2-1-3-12(13)17(21,22)23;;/h1-8,18H,(H2,21,22,23)(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2 N

Key: ZQMPNLOZJUWHSA-UHFFFAOYSA-L N

* Key: DCSRPHQBFSYJNN-GJLVVKPQBS

* InChI=1/C16H13AsN2O10S2.2Na/c20-16-14(31(27,28)29)8-9-7-10(30(24,25)26)5-6-11(9)15(16)19-18-13-4-2-1-3-12(13)17(21,22)23;;/h1-8,20H,(H2,21,22,23)(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b19-18+;;

SMILES

* [Na+].[Na+].O[As](O)(=O)c3ccccc3/N=N/c1c2ccc(cc2cc(c1O)S([O-])(=O)=O)S([O-])(=O)=O

* [Na+].[Na+].O[As](O)(=O)C1=CC=CC=C1NN=C1C(=O)C(=CC2=C1C=CC(=C2)S([O-])(=O)=O)S([O-])(=O)=O

Properties

Chemical formula

| C16H11AsN2O10S2
Molar mass | 530.31 g·mol−1
Appearance  | Orange-yellow crystals
Melting point |  300 °C (572 °F; 573 K)
Hazards
GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H301, H331, H410

GHS precautionary statements

| P261, P264, P270, P271, P273, P301+310, P304+340, P311, P321, P330, P391, P403+233, P405, P501
NFPA 704 (fire diamond)  |

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

N verify (what is YN ?)
Infobox references

Tracking categories (test):

* SizeSet

Thorin (also called thoron or thoronol) is an indicator used in the determination of barium, beryllium, lithium, uranium and thorium compounds. Being a compound of arsenic, it is highly toxic.[1]

## References

1. ↑ Haartz, J. C.; Eller, Peter M.; Hornung, Richard W. (1 November 1979). "Critical parameters in the barium perchlorate/Thorin titration of sulfate". Analytical Chemistry 51 (13): 2293–2295. doi:10.1021/ac50049a056.

## External links

* MSDS at Oxford University

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Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Thorin&oldid=1040950"
*[CID]: Compound ID
*[H301]: Toxic if swallowed
*[H331]: Toxic if inhaled
*[H410]: Very toxic to aquatic life with long lasting effects
*[P261]: Avoid breathing dust/fume/gas/mist/vapours/spray
*[P264]: Wash … thoroughly after handling
*[P270]: Do not eat, drink or smoke when using this product
*[P271]: Use only outdoors or in a well-ventilated area
*[P273]: Avoid release to the environment
*[P301+310]: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
*[P304+340]: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
*[P311]: Call a POISON CENTER or doctor/physician
*[P321]: Specific treatment (see … on this label)
*[P330]: Rinse mouth
*[P391]: Collect spillage
*[P403+233]: Store in a well ventilated place. Keep container tightly closed
*[P405]: Store locked up
*[P501]: Dispose of contents/container to …