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Rare earth compounds

Thulium-166

Also known as Thulium, isotope of mass 166, 166Tm, 166mTm isotope

CAS 15690-75-2Formula TmMolar mass 165.93 g/mol
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
CAS number
15690-75-2
Formula
Tm
Molar mass
165.93 g/mol
HS code
284443
Category
Rare earth compounds

What is Thulium-166?

Plain description, key identifiers and synonyms

Thulium-166 is a chemical substance with the molecular formula Tm and a molar mass of 165.93 g/mol. Its CAS registry number is 15690-75-2.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
thulium-166
CAS number
15690-75-2 CAS number cross-checked
Molecular formula
Tm
InChIKey
FRNOGLGSGLTDKL-OIOBTWANSA-N
InChI
InChI=1S/Tm/i1-3
Canonical SMILES
[Tm]
Isomeric SMILES
[166Tm]

Synonyms

  • Thulium, isotope of mass 166
  • 166Tm
  • 166mTm isotope
  • 166Tm isotope
  • Isotope:166mTm
  • Isotope:166Tm
  • Thulium-166m
  • 166mTm (isotope)
  • 166Tm (isotope)
  • Thulium-166 isotope
  • Isotope:Thulium-166
  • Isotope:Thulium-166m
  • Thulium-166m isotope
  • (~166~Tm)Thulium

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
165.93 g/molcalc.
Exact mass
165.9336 Dacalc.
LogP (octanol/water)
0calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
1calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Thulium-166 suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

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Thulium-166 price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Thulium-166 is traded under.

HS 2844.43Indicative HS code

Radioactive elements and isotopes and compounds other than those of subheading 284410…

World exports in 2024
$2.19B
+8.8% vs 2023, imports $2.53B
2022 to 2024
Top exporters
  1. Canada32.1%
  2. Netherlands17.0%
  3. Germany11.4%
Top importers
  1. United States37.8%
  2. Germany8.4%
  3. China5.8%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Thulium-166 is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Thulium-166, based on the data on this page

What is Thulium-166?

Thulium-166 is a chemical substance with the molecular formula Tm and a molar mass of 165.93 g/mol. Its CAS registry number is 15690-75-2.

What is the CAS number of Thulium-166?

The CAS registry number of Thulium-166 is 15690-75-2.

What is the molecular formula and weight of Thulium-166?

The molecular formula of Thulium-166 is Tm and its molar mass is 165.93 g/mol.

What is Thulium-166 used for?

Known uses and roles of Thulium-166 include isotope-labelled compounds in research and laboratory.

Is Thulium-166 hazardous?

No GHS hazard classification for Thulium-166 is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Thulium-166?

Thulium-166 is usually classified under HS code 284443 (Radioactive elements and isotopes and compounds other than those of subheading 284410…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Thulium-166?

Post a free request on CompoundList and suppliers of Thulium-166 will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Thulium-166?

Suppliers quote Thulium-166 on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Thulium-166

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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