ChemicalSuppliers

Sodium Thiosulfate suppliers and prices

Formula
Na2O3S2
CAS number
7772-98-7
Molar mass
158.11 g/mol

Cheapest by volume

$5.35 per litre

Price per unit, converted to US dollars

At Lab Alley, United States

Pack
18.9 litres for $101.32
Grade
Grade not stated · Solution 1% · packs of 1 to 25 litres
View at Lab Alley

Smallest amount to spend

$14.95 for 500 grams

Total for one pack, in the store's own currency

At Science Company, United States

Works out at
$29.90 per kilogram
Grade
Grade not stated · packs of 50 grams to 1 kilogram
View at Science Company

16 offers from 4 stores · Prices checked October 28, 2026 · Prices run from $5.35 to $412 per litre, because a bigger pack costs less per litre.

Show prices per

Liquids switch to the matching volume: microlitre, millilitre, litre, fluid ounce or US gallon.

Every price we found

16 prices, cheapest first

StoreGrade and packPriceLink
Lab AlleyUnited StatesLowest price Grade not stated · Solution 1% · packs of 1 to 25 litres18.9 litres for $101.32 $5.35 per litre View at store
Lab AlleyUnited States Grade not stated · Solution · packs of 1 to 25 litres20 litres for $275.68 $13.78 per litre View at store
GFS ChemicalsUnited States Grade not stated · Solution · packs of 1 to 25 litres20 litres for $308.61 $15.43 per litre View at store
Science CompanyUnited States Grade not stated · packs of 1 to 25 kilograms2.5 kilograms for $49.95 $19.98 per kilogram View at store
Lab AlleyUnited States Laboratory grade · packs of 25 kilograms and up50 kilograms for $1,076.69 $21.53 per kilogram View at store
Science CompanyUnited States Grade not stated · packs of 50 grams to 1 kilogram500 grams for $14.95 $29.90 per kilogram View at store
Lab AlleyUnited States ACS grade · packs of 25 kilograms and up50 kilograms for $2,595.59 $51.91 per kilogram View at store
Lab DepotUnited States Technical grade · packs of 1 to 25 kilograms12 kilograms for $625.81 $52.15 per kilogram View at store
Lab AlleyUnited States ACS grade · packs of 1 to 25 kilograms12 kilograms for $730.61 $60.88 per kilogram View at store
Lab DepotUnited States Reagent grade · packs of 1 to 25 kilograms12 kilograms for $1,129.84 $94.15 per kilogram View at store
Lab AlleyUnited States Grade not stated · Solution · packs of 50 millilitres to 1 litre500 millilitres for $49.48 $98.96 per litre View at store
Lab AlleyUnited States Grade not stated · Solution 20% · packs of 50 millilitres to 1 litre500 millilitres for $49.48 $98.96 per litre View at store
Lab AlleyUnited States ACS grade · packs of 50 grams to 1 kilogram500 grams for $52.88 $106 per kilogram View at store
Lab DepotUnited States Technical grade · packs of 50 grams to 1 kilogram500 grams for $92.29 $185 per kilogram View at store
Lab DepotUnited States Reagent grade · packs of 50 grams to 1 kilogram500 grams for $149.67 $299 per kilogram View at store
Lab AlleyUnited States Grade not stated · Solution 10% · packs of 50 millilitres to 1 litre120 millilitres for $49.48 $412 per litre View at store

Making a solution?

Pick the strength and how much you need. We work out the grams of Sodium Thiosulfate and what they cost at the cheapest store we track.

You need
158 grams
of Sodium Thiosulfate, molar mass 158.11 g/mol
That much costs
$3.40
$3.40 per litre of solution, at the lowest price per gram we found
Cheapest way to buy it
$52.88
1 pack of 500 grams at Lab Alley
View at Lab Alley

Weigh it out, dissolve it in less water than you need, then top up to the full amount.

Bulk suppliers in the US

17 companies make or distribute it, as reported to the US Environmental Protection Agency in 2020 and 2024.

Your company? List it free and get bulk buyer requests.

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Chemical identity

Formula
Na2O3S2
Molar mass
158.11 g/mol
CAS number
7772-98-7
InChIKey
AKHNMLFCWUSKQB-UHFFFAOYSA-L
Official record
PubChem 24477

How we compare: each store's own price, turned into US dollars at European Central Bank rates of 2026-10-29, then divided by the pack size. Shipping and tax are not included.