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Thimerosal

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CAS:54-64-8
Package:1G;10G;100G Remarks:Thimerosal is an antiseptic and antifungal agent used as a preservative in vaccines, immunoglobulin preparations, skin test antigens, antivenins, ophthalmic and nasal products, and tattoo inks.
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Lastest Price from Thimerosal manufacturers

  • Thimerosal
  • US $0.00-0.00 / KG
  • 2020-05-04
  • CAS:54-64-8
  • Min. Order: 1KG
  • Purity: 99.0%
  • Supply Ability: 600 Tons
  • Thimerosal
  • US $9.80 / KG
  • 2020-01-09
  • CAS:54-64-8
  • Min. Order: 1g
  • Purity: ≥99%
  • Supply Ability: 100kg
Thimerosal Basic information
Product Name:Thimerosal
Synonyms:(2-carboxylatophenyl)sulfanyl-ethylmercury;Thiomersalatum;2-(ETHYLMERCURIOMERCAPTO)BENZOIC ACID SODIUM SALT;2-(Ethylmercurio(II)thio)benzoic acid sodium;2-(Ethylmercurio(II)thio)benzoic acid sodium salt;Thimerosal ,98%;Thimerosal ,97% [sodium salt, 97.0-101.0%];ETHYLMERCURY THIOSALICYLICACID.NA-SALT RESEARCH GRADE
CAS:54-64-8
MF:C9H9HgNaO2S
MW:404.81
EINECS:200-210-4
Product Categories:Antibiotics T-Z;Antibiotics;Antibiotics A to Z;Antibiotics by Application;Building Blocks;Carbonyl Compounds;Carboxylic Acid Salts;Chemical Synthesis;Organic Building Blocks;Preservatives and Disinfectants;AGROSAN;antibiotic;Organometallics
Mol File:54-64-8.mol
Thimerosal Structure
Thimerosal Chemical Properties
Melting point 234-237 °C (dec.)(lit.)
Fp 250 °C
storage temp. Store at RT.
solubility methanol: 0.1 g/mL, ≤ 10 TE CF
form Powder
color white to off-white
PH6.0~8.0 (10g/L, 25℃)
Water Solubility 1 G/ML (20 ºC)
Merck 13,9389
BRN 8169555
Stability:Stable. May degrade in sunlight. Incompatible with strong acids, strong bases, strong oxidizing agents, iodine, heavy metal salts.
InChIKeyRTKIYNMVFMVABJ-UHFFFAOYSA-L
CAS DataBase Reference54-64-8(CAS DataBase Reference)
EPA Substance Registry SystemThimerosal (54-64-8)
Safety Information
Hazard Codes T+,N,T
Risk Statements 26/27/28-33-50/53
Safety Statements 13-28-36-45-60-61-28A
RIDADR UN 2025 6.1/PG 3
WGK Germany 3
RTECS OV8400000
8
TSCA Yes
HazardClass 6.1(b)
PackingGroup III
HS Code 29310095
Hazardous Substances Data54-64-8(Hazardous Substances Data)
ToxicityLD50 s.c. in rats: 98 mg/kg (Mason)
MSDS Information
ProviderLanguage
SigmaAldrich English
ACROS English
Thimerosal Usage And Synthesis
Chemical PropertiesSlightly beige powder
Chemical PropertiesThimerosal is a light cream-colored crystalline powder with a slight, characteristic odor.
UsesPharmaceutic aid (preservative).
UsesThiomersal is an organomercury compound that is used as an antiseptic and antifungal agent It is used as a vaccine preservative. During cell culture, thiomersal is used to prevent overgrowth in fibroblast cells 1. It has been used to preserve Atovaquone 2.
Usesantifungal, antimicrobial
Usesnootropic Anti-Alzheimer’s drug main ingredient of Neupramir derived from Piracetam but 8-30 times more potent
DefinitionChEBI: An alkylmercury compound (approximately 49% mercury by weight) used as an antiseptic and antifungal agent.
Production MethodsThimerosal is prepared by the interaction of ethylmercuric chloride, or hydroxide, with thiosalicylic acid and sodium hydroxide, in ethanol (95%).
Brand nameThiomersal is INN and BAN;Thiobactal.
General DescriptionLight cream-colored crystalline powder with a slight odor: pH (1% aqueous solution) 6.7. Slight odor.
Air & Water ReactionsWater soluble.
Reactivity ProfileThimerosal is incompatible with strong oxidizing agents and strong bases. The oxidation of Thimerosal is greatly accelerated by traces of copper ions. Incompatible with acids, iodine, heavy metal salts and many alkaloids. Can be absorbed by rubber caps. . Stable in air, but not sunlight. May discolor on exposure to light. Dilute aqueous solutions are fairly stable to heat but sensitive to light. Solutions are less stable to heat when acidic than when alkaline. Solutions are most stable to light at pH 5 to 7. Solutions are unstable to heat but not to light in the presence of copper, iron or zinc ions but not in the presence of calcium or magnesium ions.
HazardToxic by ingestion, inhalation.
Fire HazardFlash point data for Thimerosal are not available; however, Thimerosal is probably combustible.
Pharmaceutical ApplicationsThimerosal has been used as an antimicrobial preservative in biological and pharmaceutical preparations since the 1930s.
It is used as an alternative to benzalkonium chloride and other phenylmercuric preservatives, and has both bacteriostatic and fungistatic activity. Increasing concerns over its safety have, however, led to questions regarding its continued use in formulations.
Thimerosal is also used in cosmetics and to preserve soft contact lens solutions.
Therapeutically, thimerosal is occasionally used as a bacteriostatic and fungistatic mercurial antiseptic, which is usually applied topically at a concentration of 0.1% w/w. However, its use is declining owing to its toxicity and effects on the environment.
Contact allergensThiomersal is an organic mercury salt prepared by react- ing ethylmercuric chloride (or ethylmercuric hydroxide) with thiosalicylic acid. It is still used as a disinfectant and a preservative agent, but less commonly than previ- ously, especially in contact lens fluids, eyedrops, and vaccines. The ethylmercuric moiety is the major aller- genic determinant, sometimes associated with mercury sensitivity. Thiomersal is an indicator of photosensitiv- ity to piroxicam, through its thiosalicylic moiety.
Safety ProfilePoison by ingestion, subcutaneous, and intravenous routes. Experimental teratogenic and reproductive effects. An eye irritant. Questionable carcinogen with experimental neoplastigenic data. Mutation data reported. An ophthalmic preservative, a topical anti-infective, topical veterinary antibacterial and antifungal agent. An FDA over-the-counter drug. When heated to decomposition it emits very toxic fumes of Hg, Na2O, and SOx. See also MERCURY COMPOUNDS.
SafetyThimerosal is widely used as an antimicrobial preservative in parenteral and topical pharmaceutical formulations. However, concern over the use of thimerosal in pharmaceuticals has increased as a result of a greater awareness of the toxicity of mercury and other associated mercury compounds. The increasing number of reports of adverse reactions, particularly hypersensitivity, to thimerosal and doubts as to its effectiveness as a preservative have led to suggestions that it should not be used as a preservative in eye drops or vaccines. In both Europe and the USA, regulatory bodies have recommended that thimerosal in vaccines be phased out.
More recent studies assessing the safety of thimerosal in vaccines have, however, suggested that while the risk of hypersensitivity reactions is present, the relative risk of neurological harm in infants is negligible given the quantities of thimerosal present in vaccines. Regulatory bodies in Europe and the USA have therefore updated their advice on the use of thimerosal in vaccines by stating that while it would be desirable for thimerosal not to be included in vaccines and other formulations the benefits of vaccines far outweigh any risks of adverse effects associated with their use.
The most frequently reported adverse reaction to thimerosal, particularly in vaccines, is hypersensitivity, usually with erythema and papular or vesicular eruptions. Although not all thimerosal-sensitive patients develop adverse reactions to vaccines containing thimerosal, there is potential risk. Patch testing in humans and animal experiments have suggested that 0.1% w/v thimerosal can sensitize children. The incidence of sensitivity to thimerosal appears to be increasing; a study of 256 healthy subjects showed approximately 6% with positive sensitivity.
Adverse reactions to thimerosal used to preserve contact lens solutions have also been reported. Reactions include ocular redness, irritation, reduced lens tolerance, and conjunctivitis. One estimate suggests that approximately 10% of contact lens wearers may be sensitive to thimerosal.
Thimerosal has also been associated with false positive reactions to old tuberculin, ototoxicity, and an unusual reaction to aluminum in which a patient suffered a burn 5 cm in diameter at the site of an aluminum foil diathermy electrode after preoperative preparation of the skin with a 0.1% w/v thimerosal solution in ethanol (50%). Investigation showed that considerable heat was generated when such a solution came into contact with aluminum. An interaction between orally administered tetracyclines and thimerosal, which resulted in varying extents of ocular irritation, has been reported in patients using a contact lens solution preserved with thimerosal.
Controversially, some have claimed a connection between the use of thimerosal in vaccines and the apparent rise in the incidence of autism. However, recent studies have shown no association between thimerosal exposure and autism.
Serious adverse effects and some fatalities have been reported following the parenteral and topical use of products containing thimerosal. Five fatal poisonings resulted from the use of 1000 times the normal concentration of thimerosal in a chloramphenicol preparation for intramuscular injection.
Ten out of 13 children died as a result of treatment of umbilical hernia (omphaloceles) with a topical tincture of thimerosal. It has therefore been recommended that organic mercurial disinfectants should be restricted or withdrawn from use in hospital since absorption occurs readily through intact membranes.
In a case of attempted suicide, a 44-year-old man drank 83 mg/kg of a thimerosal-containing solution. Despite spontaneously vomiting after 15 minutes, gastric lavage and administration of chelating agents on hospital admission, serious symptoms ultimately ending in coma occurred. The patient survived and after 5 months treatment made a full recovery except for sensory defects in two toes.
LD50 (mouse, oral): 91 mg/kg
LD50 (rat, oral): 75 mg/kg
LD50 (rat, SC): 98 mg/kg
storageThimerosal is stable at normal temperatures and pressures; exposure to light may cause discoloration.
Aqueous solutions may be sterilized by autoclaving but are sensitive to light. The rate of oxidation in solutions is increased by the presence of trace amounts of copper and other metals. Edetic acid or edetates may be used to stabilize solutions but have been reported to reduce the antimicrobial efficacy of thimerosal solutions.
The solid material should be stored in a well-closed container, protected from light, in a cool, dry place.
Purification MethodsRecrystallise this antibacterial from EtOH/Et2O. HIGHLY TOXIC. [Trikojus Nature 158 472 1940, Beilstein 10 III 213.]
IncompatibilitiesIncompatible with aluminum and other metals, strong oxidizing agents, strong acids and bases, sodium chloride solutions, lecithin, phenylmercuric compounds, quaternary ammonium compounds, thioglycolate, and proteins. The presence of sodium metabisulfite, edetic acid, and edetates in solutions can reduce the preservative efficacy of thimerosal.
In solution, thimerosal may be adsorbed by plastic packaging materials, particularly polyethylene. It is strongly adsorbed by treated or untreated rubber caps that are in contact with solutions.
When it was used with cyclodextrin, the effectiveness of thimerosal was reduced; however, this was related to the lipid nature of the other ingredients in the preparation.
Regulatory StatusIncluded in the FDA Inactive Ingredients Database (IM, IV, and SC injections; ophthalmic, otic, and topical preparations). Included in nonparenteral and parenteral medicines licensed in the UK. In the UK, the use of thimerosal in cosmetics is limited to 0.003% w/w (calculated as mercury) as a preservative in shampoos and haircreams, which contain nonionic emulsifiers that would render other preservatives ineffective. The total permitted concentration (calculated as mercury) when mixed with other mercury compounds is 0.007% w/w. Included in the Canadian List of Acceptable Nonmedicinal Ingredients.
Thimerosal Preparation Products And Raw materials
Raw materialsBromoethane
Tag:Thimerosal(54-64-8) Related Product Information
Sodium chloride Thimerosal Trisodium phosphate 8-CHLOROADENOSINE-3',5'-CYCLIC MONOPHOSPHOROTHIOATE, RP-ISOMER SODIUM SALT MERCURIC THIOCYANATE Diclofenac sodium Diethylaminosulfur trifluoride Salicylic acid Sodium alginate Sodium benzoate Sodium acetate SODIUM MERCURY AMALGAM Thiosalicylic acid SODIUM BENZYLOXIDE THIOSALICYLIC ACID SODIUM SALT Sodium salicylate Orphenadrine citrate Sodium citrate