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CAS 1 record

CAS 7440-28-0

CAS 7440-28-0 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 7440-28-0
CAS 7440-28-0PubChem CID 5359464

Thallium

Pure thallium is a bluish-white metal that is found in trace amounts in the earth's crust. In the past, thallium was obtained as a by-product from smelting other metals; however, it has not been produced in the United States since 1984. Currently, all the thallium is obtained from imports and from thallium reserves.. In its pure form, thallium is odorless and tasteless. It can also be found combined with other substances such as bromine, chlorine, fluorine, and iodine. When it's combined, it appears colorless-to-white or yellow.. Thallium is used mostly in manufacturing electronic devices, switches, and closures, primarily for the semiconductor industry. It also has limited use in the manufacture of special glass and for certain medical procedures. — Agency for Toxic Substances and Disease Registry (ATSDR)

IUPAC name
thallium
Molecular formula
Tl
Molecular weight
204.383 g/mol
Exact mass
204.97443 Da
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
0
Covalent units
1
Defined stereocentres
0

Also known as

RamorThallium, elementalThulium Metallicumlambda1-thallanyliumThallium 205MUSCLE SPASMSRefChem:56120THALLIUM METALLICUM
16 more reported names
AD84R52XLFCHEBI:30440CHEBI:37109231-138-181TlTalioTlThallium granulesRamor; Thallium, metallic; Thallium, elemental;Thallium Standard: Tl @ 1000 microg/mL in 5% HNO3Thallium Standard: Tl @ 10000 microg/mL in 5% HNO3Thallium AA Standard: Tl @ 1000 microg/mL in 5% HNO3Thallium Standard: Tl @ 1000 microg/g in Hydrocarbon Oilthallium atomAtomic ThalliumElement Thallium
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Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 7440-28-0

1 total

How CAS 7440-28-0 is used on this site

CAS 7440-28-0 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 7440-28-0 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.

Frequently asked questions

A substance identified by CAS 7440-28-0 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts. For example, a substance might be restricted under Annex III with specific conditions, and the same CAS might also appear in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

Cross-reference the CAS number against your raw material specification sheets and CoA documents. When a CAS appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met in your formulation. All annex entries sharing this CAS number are listed above.

A CAS number is assigned by the Chemical Abstracts Service (USA) and is globally recognised. An EC number is a European Commission identifier from inventories such as EINECS, ELINCS or the NLP list. Both identifiers may appear in EU cosmetic annex entries. Some substances have both, some have only one, and some older entries may have neither.

The INCI Checker accepts ingredient names, CAS numbers and EC numbers. Check this CAS number directly, then verify the result against supplier specification sheets and every linked annex condition.
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