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; thiomersalate sodium;
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. Despite the scientific consensus that fears about its safety are unsubstantiated, its use as a vaccine preservative has been exploited by anti-vaccination groups.