Thiomersal

Thiomersal
Names
	IUPAC name Ethyl(2-mercaptobenzoato-(2-)-O,S) mercurate(1-) sodium
	Other names Mercury((o-carboxyphenyl)thio)ethyl sodium salt, sodium ethylmercurithiosalicylate
Identifiers
CAS Number	54-64-8 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	8169555
ChEBI	CHEBI:9546 ;
ChEMBL	ChEMBL508338 ;
ChemSpider	10772045 ;
DrugBank	DB11590;
ECHA InfoCard	100.000.192
EC Number	200-210-4;
Gmelin Reference	1677155
KEGG	D00864;
PubChem CID	16684434;
RTECS number	OV8400000;
UNII	2225PI3MOV ;
CompTox Dashboard (EPA)	DTXSID3025540 ;
	InChI InChI=1S/C7H6O2S.C2H5.Hg.Na/c8-7(9)5-3-1-2-4-6(5)10;1-2;;/h1-4,10H,(H,8,9);1H2,2H3;;/q;;2+1/p-2 Key: RTKIYNMVFMVABJ-UHFFFAOYSA-L ; InChI=1/C7H6O2S.C2H5.Hg.Na/c8-7(9)5-3-1-2-4-6(5)10;1-2;;/h1-4,10H,(H,8,9);1H2,2H3;;/q;;2+1/p-2/rC9H10HgO2S.Na/c1-2-10-13-8-6-4-3-5-7(8)9(11)12;/h3-6H,2H2,1H3,(H,11,12);/q;+1/p-1 Key: RTKIYNMVFMVABJ-TYXNQWANAP;
	SMILES [Na+].[O-]C(=O)c1ccccc1S[Hg]CC;
Properties
Chemical formula	C9H9HgNaO2S
Molar mass	404.81 g/mol
Appearance	White or slightly yellow powder
Density	2.508 g/cm3
Melting point	232 to 233 °C (450 to 451 °F; 505 to 506 K) (decomposition)
Solubility in water	1000 g/L (20 °C)
Pharmacology
ATC code	D08AK06 (WHO)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H310, H330, H373, H410
Precautionary statements	P260, P273, P280, P301, P302, P304, P310, P330, P340, P352
NFPA 704 (fire diamond)	3 1 1
Flash point	250 °C (482 °F; 523 K)
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	75 mg/kg (oral, rat)
Safety data sheet (SDS)	External MSDS
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Thiomersal (INN), or thimerosal (USAN, JAN), also sold under the name merthiolate, is an organomercury compound. It is a well-established antiseptic and antifungal agent.

It has been used as a preservative in vaccines, immunoglobulin preparations, skin test antigens, antivenins, ophthalmic and nasal products, and tattoo inks. In spite of the scientific consensus that fears about its safety are unsubstantiated, its use as a vaccine preservative has been called into question by anti-vaccination groups.