Chemistry:Thorin

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)	0 3 0
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.

External links

• MSDS at Oxford University