Molekula
Thimerosal (2-(Ethylmercuriomercapto)benzoic acid sodium salt)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Thimerosal is an organomercury compound primarily used as a preservative in vaccines, cosmetics, and some medical products to prevent bacterial and fungal contamination. It is also historically used in some eye drops and topical antiseptics. This chemical has a CAS number of 54-64-8, with the molecular formula C9H9HgO2S·Na and a molecular weight of 404.81. It should be stored at ambient conditions and handled with caution, as it carries a "Danger" signal word due to its toxicity. Molekula supplies Thimerosal from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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25 g — £116.70 per pack ex VAT · £140.04 inc. VAT
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100 g — £333.60 per pack ex VAT · £400.32 inc. VAT
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250 g — £751.00 per pack ex VAT · £901.20 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| pH | 6 - 8 |
| Loss on Drying | ≤0.5% |
| Assay | 97 - 101% |
| Mercury ion (Hg 2+) | ≤0.7% |
| Substances soluble in Ether | ≤0.6% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | II |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Cream colored, crystalline powder |
| Odour | Characteristic odor |
| log P (octanol/water) | -1.88 |
Source: PubChem CID 16684434 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 13841854 |
| CAS Number | 54-64-8 |
| IUPAC Name | sodium (2-carboxylatophenyl)sulfanyl-ethylmercury |
| EC Number | 200-210-4 |
| Molecular Formula | C9H9HgO2S.Na |
| Molecular Weight | 404.81 |
| Exact Mass | 405.9927 |
| SMILES | CC[Hg]SC1=CC=CC=C1C(=O)[O-].[Na+] |
| InChIKey | RTKIYNMVFMVABJ-UHFFFAOYSA-L |
| 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 |
| PubChem CID | 16684434 |
| UN Number | UN2025 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2852.10.1000 |
| Tariff Code | 2852100000 |
Safety & GHS
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Toxic
GHS06
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H301 Toxic if swallowed
- H310 Fatal in contact with skin
- H317 May cause an allergic skin reaction
- H330 Fatal if inhaled
- H373 May cause damage to organs through prolonged or repeated exposure
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P302+352 IF ON SKIN: Wash with soap and water
- P307+311 IF exposed: Call a POISON CENTER or doctor/physician
- P410 Protect from sunlight
Documents
Safety Data Sheets (SDS)
Available in English, English (US).
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Thimerosal commonly used for?
Thimerosal is primarily used as a preservative in vaccines, cosmetics, and some medical products to prevent bacterial and fungal contamination.
What is the chemical formula and molecular weight of Thimerosal?
The chemical formula is **C9H9HgO2S·Na**, and the molecular weight is **404.81 g/mol**.
What safety classification does Thimerosal have, and how should it be handled?
Thimerosal is classified with the **Signal Word: Danger** due to its mercury content—handle with appropriate PPE and follow local hazardous material regulations.
What grades or purities of Thimerosal does Molekula supply?
Molekula supplies Thimerosal in **pharmaceutical-grade purity**, suitable for regulated applications like vaccine preservation.
Can Molekula supply Thimerosal in bulk quantities?
Yes, we offer Thimerosal in bulk, with flexible packaging options (e.g., drums, bottles) based on customer requirements.
What documentation is provided with a Thimerosal order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and **batch-specific documentation** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.