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Sodium thiosulfate, pentahydrate

CAS 10102-17-7

EPA’s 2023 records show zero U.S. production of this chemical.

Molecular structure of 10102-17-7
5 H₂O · 2 Na⁺
US productionZero
Import value, 2024$8M
Import volumeCBI
Top sourceVietnam 77%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 283230 · narrow

EPA reports by year
2023
US production Zero · Imports Confidential
2019
US production Zero · Imports 6.5M lb

These shares come from HS customs code 283230, which covers 7 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
VN 77%VietnamCN 13%ChinaIN 4%IndiaDE 2%GermanyTW 1%Taiwan
Domestic parents -- activity not disclosed (1)
Polyventive
EPA-registered importers (6)
Brenntag
Esseco Usa
Global Chemical Resources
Independent Chemical
Univar Solutions Usa
Show all 6
Wego Chemical Group

Why It Matters

Sectors
AgricultureEnergyMetals & MiningTextilesConsumer ProductsCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 6 sectors as 5 functional roles.

  • •Reducing agent in Services (40%)Processing as a reactant
  • •Reducing agent in Oil and Gas Drilling, Extraction, and Support activities (10%)Processing—incorporation into formulation, mixture, or reaction product
  • •Reducing agent in Photographic Film, Paper, Plate, and Chemical Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
  • •Tanning agents not otherwise specified in Textiles, apparel, and leather manufacturing (10%)Processing as a reactant
  • •Laboratory chemicals in All Other Chemical Product and Preparation Manufacturing (10%)Processing as a reactant
  • •Cleaning agent in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (0%)Processing—incorporation into formulation, mixture, or reaction product
  • •Dehydrating agent (desiccant) in Oil and Gas Drilling, Extraction, and Support activitiesProcessing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.00/gAaron Chemicals LLC
CountryHong Kong
Pack$87.00 / 25 kg
Purity99%
Vendors17 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

16 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.0025 kg99%
A2B Chem LLCUnited States$0.0150 kg98%
AA BLOCKSUnited States$0.0150 kg98%
Fluorochem UKUnited Kingdom$0.0110 kg98%
BLD Pharmatech GmbHGermany$0.031 kg95%
BLD Pharmatech Ltd.China$0.031 kg95%
Fluorochem EUGermany$0.031 kg98%
Sigma-Aldrich (Rush Stock)Germany$0.042.5 kg—
Sigma-AldrichGermany$0.042.5 kg—
AK Scientific SpecializedUnited States$0.051 kg98%
AK Scientific, Inc.United States$0.061 kg99%
BLD Pharmatech Co., LimitedUnited States$0.111 kg95%
Ambeed, Inc.United States$0.111 kg95%
Angene International LimitedUnited States$0.21500 g99.5%
Combi-Blocks, Inc.United States$0.251 kg95%
AngeneChina → Hong Kong$4266.6730 mg99%

Chemical Identity

CAS10102-17-7
PubChem CID61475
DTXSIDDTXSID6044197
FormulaH10Na2O8S2
Mol. Weight248.19 g/mol
SMILESO.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]

Data Sources

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Brief citations

Sodium thiosulfate, pentahydrate (CAS 10102-17-7) https://chemicalindependence.com/chemical/10102-17-7/ EPA CompTox (DSSTox): DTXSID6044197. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6044197 PubChem: 61475. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/61475 EPA Chemical Data Reporting: 10102-17-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 10102-17-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 283230 for CAS 10102-17-7. Reporting year: 2024. https://usatrade.census.gov/