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Chlorides and other halides

Caesium triiodide

Also known as Cesium triiodide, cesium, triiodide, Caesium iodide (1/1)

CAS 12297-72-2Formula CsI3Molar mass 513.62 g/molEC 625-701-4
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard
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Caesium triiodide chemical structure, CsI3, CAS 12297-72-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
12297-72-2
Formula
CsI3
Molar mass
513.62 g/mol
EC number
625-701-4
HS code
282760
Category
Chlorides and other halides

What is Caesium triiodide?

Plain description, key identifiers and synonyms

Caesium triiodide is a chemical substance with the molecular formula CsI3 and a molar mass of 513.62 g/mol. Its CAS registry number is 12297-72-2. The IUPAC name is cesium triiodide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
cesium triiodide
CAS number
12297-72-2 CAS number cross-checked
EC number
625-701-4
Molecular formula
CsI3
MDL number
MFCD00016053
InChIKey
PSDVEXXHXQVSQT-UHFFFAOYSA-N
InChI
InChI=1S/Cs.I3/c;1-3-2/q+1;-1
SMILES (canonical and isomeric)
I[I-]I.[Cs+]

Synonyms

  • Cesium triiodide
  • cesium, triiodide
  • Caesium iodide (1/1)
  • Cesium triiodide, >=99.9%

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
513.62 g/molcalc.
Exact mass
513.6189 Dacalc.
LogP (octanol/water)
-4.22calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
4calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H315Causes skin irritation.
  • H317May cause an allergic skin reaction.
  • H319Causes serious eye irritation.
  • H334May cause allergy or asthma symptoms or breathing difficulties if inhaled.
  • H335May cause respiratory irritation.
Precautionary statements (23)
  • P233Keep container tightly closed.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P342 + P316If experiencing respiratory symptoms: Get emergency medical help immediately.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403Store in a well-ventilated place.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Full safety data and first aid

Caesium triiodide suppliers

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Caesium triiodide 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

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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 Caesium triiodide is traded under.

HS 2827.60Indicative HS code

Iodides and iodide oxides

World exports in 2024
$389M
+14.6% vs 2023, imports $381M
2019 to 2024
Top exporters
  1. Japan17.1%
  2. Chile17.0%
  3. India * partner reported12.8%
Top importers
  1. China28.9%
  2. Germany14.7%
  3. South Korea9.1%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Caesium triiodide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Caesium triiodide, based on the data on this page

What is Caesium triiodide?

Caesium triiodide is a chemical substance with the molecular formula CsI3 and a molar mass of 513.62 g/mol. Its CAS registry number is 12297-72-2. The IUPAC name is cesium triiodide.

What is the CAS number of Caesium triiodide?

The CAS registry number of Caesium triiodide is 12297-72-2.

What is the molecular formula and weight of Caesium triiodide?

The molecular formula of Caesium triiodide is CsI3 and its molar mass is 513.62 g/mol.

Is Caesium triiodide hazardous?

Caesium triiodide carries the GHS signal word "Danger". Main hazards: causes skin irritation, may cause an allergic skin reaction, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Caesium triiodide?

Caesium triiodide is usually classified under HS code 282760 (Iodides and iodide oxides). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Caesium triiodide?

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What is the price of Caesium triiodide?

Suppliers quote Caesium triiodide 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 Caesium triiodide

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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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