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Clerici Solution
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Clerici Solution Properties (Theoretical)

Compound Formula C4H2O6Tl2
Molecular Weight 554.82
Appearance Colorless to yellow liquid
Melting Point N/A
Boiling Point ~115 °C (760 mm/hg)
Density 4.25 g/cm3 (20 °C) / 4.36 g/cm3 (25 °C)
Solubility in H2O Fully soluble
Refractive Index n20/D 1.581
Exact Mass 555.933993
Monoisotopic Mass 555.933993

Clerici Solution Health & Safety Information

Signal Word Danger
Hazard Statements H301-H311-H315-H318-H331-H410
Hazard Codes T+, N
Precautionary Statements P261-P270-P280-P301+P310-P302+P352-P310-P332+P313-P403-P405
Risk Codes 26/27/28-33-36/37/38
Safety Statements 23-26-36/37/39-45
RTECS Number N/A
Transport Information UN 2810 6.1/PG II
WGK Germany 3
GHS Pictograms

About Clerici Solution

Clerici Solution (Clerici's Solution, Thallium Malonate Formate, or TMF) is a water-based aqueous solution composed of a mixture of thallium formate and thallium malonate with an extremely high density useful in the separation of minerals. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available, as is additional research, technical and safety (MSDS) data. Please contact us for information on lead time and pricing above.

Clerici Solution Synonyms

Clerici's solution; Thallium Malonate Formate; TMF; Thallium(I) malonate/formate solution; thallous malonate/formate, dithallium(1+) 3-(carboxylatooxy)-3-oxopropanoate; Propanedioic acid, dithallium(1+) salt, mixt. with thallium(1+) formate; TlOOCH&/(TlOOC)2CH2

Chemical Identifiers

Linear Formula Tl(HCO2)•Tl(C3H3O4)
MDL Number MFCD00146471
EC No. N/A
Beilstein/Reaxys No. N/A
Pubchem CID 25113318
IUPAC Name 3-carboxylatooxy-3-oxopropanoate; thallium(1+)
SMILES C(C(=O)[O-])C(=O)OC(=O)[O-].[Tl+].[Tl+]
InchI Identifier InChI=1S/C4H4O6.2Tl/c5-2(6)1-3(7)10-4(8)9;;/h1H2,(H,5,6)(H,8,9);;/q;2*+1/p-2

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


See more Thallium products. Thallium (atomic symbol: Tl, atomic number: 81) is a Block P, Group 13, Period 6 element with an atomic weight of 204.38. Thallium Bohr ModelThe number of electrons in each of thallium's shells is 2, 8, 18, 32, 18, 3 and its electron configuration is [Xe] 4f14 5d10 6s2 6p1. The thallium atom has a radius of 170 pm and a Van der Waals radius of 196 pm. Thallium was discovered by Sir William Crookes in 1861 and first isolated by Claude-Auguste Lamy in 1862. Thallium is a post-transition metal that is not found free in nature. Thallium is primarily used for its electrical conductivity as thallium sulfide, which changes with exposure to infrared light. This ability makes the compound useful in photocells. Elemental ThalliumThallium bromide-iodide crystals have been used as infrared optical materials. Thallium has also been used with sulfur, selenium or arsenic to produce low melting glasses which become fluid between 125 and 150 °C, while thallium oxide has been used to produce glasses with a high index of refraction, and is also used in the manufacture of photo cells. Its name is derived from the Greek word thallos, which means twig or green shoot.


March 07, 2021
Los Angeles, CA
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