Molekula
Thallium(I) sulfate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Thallium(I) sulfate is a highly toxic inorganic salt containing thallium in the +1 oxidation state, primarily used in rodenticides, laboratory research, and historical applications such as depilatory (hair-removal) preparations and medical treatments. It is a white crystalline solid with high solubility in water. This chemical has a CAS number of 7446-18-6, a molecular formula of Tl₂SO₄, and a molecular weight of 504.83 g/mol. It must be stored at ambient conditions in a secure, labeled container due to its extreme toxicity. The signal word is "Danger," indicating severe hazards.
Molekula supplies Thallium(I) sulfate at ≥99.0% purity in 5 g packs, from £37.08 inc. VAT. It is made or sourced to order. Every batch ships with a certificate of analysis, and safety data sheets are available in 5 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
On backorder — expected to ship by 5 December 2026
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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5 g — £30.90 per pack ex VAT · £37.08 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 or off-white powder |
| Assay | ≥99.0% |
| Cadmium (Cd) | ≤0.05% |
| Iron (Fe) | ≤0.05% |
| Lead (Pb) | ≤0.1% |
| Copper (Cu) | ≤0.1% |
| Zinc (Zn) | ≤0.1% |
| Sodium (Na) | ≤0.05% |
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 | White rhomboid crystals |
| Odour | Odorless |
| Melting Point | 632 °C |
| Refractive Index | 1.860 |
Source: PubChem CID 24833 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 90028926 |
| CAS Number | 7446-18-6 |
| IUPAC Name | bis(thallium(1+));sulfate |
| EC Number | 231-201-3 |
| Molecular Formula | Tl2SO4 |
| Molecular Weight | 504.83 |
| Exact Mass | 505.9006 |
| SMILES | [O-]S(=O)(=O)[O-].[Tl+].[Tl+] |
| InChIKey | YTQVHRVITVLIRD-UHFFFAOYSA-L |
| InChI | InChI=1S/H2O4S.2Tl/c1-5(2,3)4;;/h(H2,1,2,3,4);;/q;2*+1/p-2 |
| PubChem CID | 24833 |
| UN Number | UN1707 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2833.29.51.90 |
| Tariff Code | 2833298080 |
Safety & GHS
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Toxic
GHS06
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H300 Fatal if swallowed
- H311 Toxic in contact with skin
- H315 Causes skin irritation
- H372 Causes damage to organs through prolonged or repeated exposure
- H400 Very toxic to aquatic life
- H411 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
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P309+311 IF exposed or you feel unwell: Call a POISON CENTER or doctor/physician
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- Bonide antzix
- Dithallium sulfate
- Dithallium(1+) sulfate
- Eccothal
- Th-Universal
- THALLIUM SULFATE
- Thallium sulphate
- Thallous sulfate
- Tharattin
- Zelio
Frequently asked questions
What is Thallium(I) sulfate commonly used for?
Thallium(I) sulfate is primarily used in rodenticides, as a laboratory reagent for analytical chemistry, and historically in medical treatments (though medical use is now obsolete due to toxicity).
What is the chemical formula and molecular weight of Thallium(I) sulfate?
The chemical formula is Tl₂SO₄, and the molecular weight is 504.83 g/mol.
How should Thallium(I) sulfate be stored?
Store Thallium(I) sulfate in a cool, dry place at ambient temperature, away from incompatible substances, and ensure proper containment due to its toxicity.
What grades or purities of Thallium(I) sulfate does Molekula supply?
Molekula supplies Thallium(I) sulfate with an assay of ≥99.0%, as a white or off-white powder, with specified limits for trace metals including cadmium, iron and sodium (≤0.05% each) and lead, copper and zinc (≤0.1% each).
Can Molekula supply Thallium(I) sulfate in bulk quantities?
Yes, Molekula can supply Thallium(I) sulfate in bulk, with quantities tailored to customer requirements—please contact us for specific availability.
What documentation comes with an order of Thallium(I) sulfate?
Each order includes a Certificate of Analysis (CoA), Safety Data Sheet (SDS), and a Danger label due to its hazardous nature.
Where can I buy Thallium(I) sulfate?
Directly from Molekula, which lists Thallium(I) sulfate in 5 g packs from £37.08 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Is Thallium(I) sulfate dangerous goods for shipping?
Yes. Thallium(I) sulfate ships as dangerous goods: UN1707, class 6.1, packing group II.
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.