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Sulfates and sulfur salts

Barium thiosulfate

Also known as Barium thiosulphate, Bariumthiosulfate, Thiosulfuric acid (H2S2O3), barium salt (1:1)

CAS 35112-53-9Formula BaO3S2Molar mass 249.46 g/molEC 252-375-7
GHS signal word: Warning. Pictograms: Harmful or irritant 3 suppliers listed
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Barium thiosulfate chemical structure, BaO3S2, CAS 35112-53-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
35112-53-9
Formula
BaO3S2
Molar mass
249.46 g/mol
EC number
252-375-7
HS code
283230
Category
Sulfates and sulfur salts

What is Barium thiosulfate?

Plain description, key identifiers and synonyms

Barium thiosulfate is a chemical substance with the molecular formula BaO3S2 and a molar mass of 249.46 g/mol. Its CAS registry number is 35112-53-9. The IUPAC name is barium(2+), dioxido-oxo-sulfanylidene-λ6-sulfane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
barium(2+), dioxido-oxo-sulfanylidene-λ6-sulfane
CAS number
35112-53-9 CAS number cross-checked
EC number
252-375-7
Molecular formula
BaO3S2
UNII
GPA80950AB
MDL number
MFCD00040661
InChIKey
ONPIOWQPHWNPOQ-UHFFFAOYSA-L
InChI
InChI=1S/Ba.H2O3S2/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
SMILES (canonical and isomeric)
[O-]S(=O)(=S)[O-].[Ba+2]

Synonyms

  • Barium thiosulphate
  • Bariumthiosulfate
  • Thiosulfuric acid (H2S2O3), barium salt (1:1)
  • barium(2+), dioxido-oxo-sulfanylidene-lambda6-sulfane
  • barium sulfurothioate
  • BaO3S2
  • Barium thiosulfate h2o
  • barium(2+), dioxido-oxo-thioxo-lambda6-sulfane

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
249.46 g/molcalc.
Exact mass
249.8341 Dacalc.
LogP (octanol/water)
-1.39calc.
Topological polar surface area
63.19 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
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
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H332Harmful if inhaled.
Precautionary statements (9)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P301 + P317If swallowed: Get medical help.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P317Get medical help.
  • P330Rinse mouth.
  • 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

Barium thiosulfate suppliers

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All 3 suppliers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

3 suppliers in 2 countries

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Barium thiosulfate price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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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

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Barium thiosulfate is traded under.

HS 2832.30Indicative HS code

Thiosulphates

World exports in 2024
$112M
+10.8% vs 2023, imports $96.9M
2019 to 2024
Top exporters
  1. United States43.5%
  2. China14.6%
  3. Belgium12.3%
Top importers
  1. Mexico10.4%
  2. United States10.0%
  3. Canada7.6%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Barium thiosulfate, based on the data on this page

What is Barium thiosulfate?

Barium thiosulfate is a chemical substance with the molecular formula BaO3S2 and a molar mass of 249.46 g/mol. Its CAS registry number is 35112-53-9. The IUPAC name is barium(2+), dioxido-oxo-sulfanylidene-λ6-sulfane.

What is the CAS number of Barium thiosulfate?

The CAS registry number of Barium thiosulfate is 35112-53-9.

What is the molecular formula and weight of Barium thiosulfate?

The molecular formula of Barium thiosulfate is BaO3S2 and its molar mass is 249.46 g/mol.

Is Barium thiosulfate hazardous?

Barium thiosulfate carries the GHS signal word "Warning". Main hazards: harmful if swallowed, harmful if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Barium thiosulfate?

Barium thiosulfate is usually classified under HS code 283230 (Thiosulphates). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Barium thiosulfate?

CompoundList lists 3 suppliers of Barium thiosulfate in United States and Germany. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Barium thiosulfate?

Suppliers quote Barium thiosulfate 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 Barium thiosulfate

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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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