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2,4-Diethyl-9H-thioxanthen-9-one

CAS 82799-44-8

U.S. production volumes are classified as confidential business information.

Molecular structure of 82799-44-8
US productionCBI
Import value, 2024$6.4B
Top sourceSingapore 36%

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. US production volume is confidential. 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 293499 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 293499, which covers 575 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India
Domestic parents -- activity not disclosed (3)
Arkema
Flint Cps Inks North America
Flint Group Packaging Inks North America Holdings
EPA-registered importers (3)
Rahn Ag · CH Switzerland
Aalborz Chemical
Rahn Usa

Why It Matters

Sectors
ConstructionPaints & CoatingsPaper & Printing
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 4 sectors as 3 functional roles.

  • •Photosensitive agent in Printing Ink ManufacturingProcessing—repackaging
  • •Photosensitive agent in Printing and Related Support ActivitiesProcessing—incorporation into formulation, mixture, or reaction product
  • •Hardener in Printing Ink ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Photosensitive agent in Adhesive Manufacturing (5%)Processing—incorporation into formulation, mixture, or reaction product
  • •Photosensitive agent in Paint and Coating Manufacturing (40%)Processing—incorporation into formulation, mixture, or reaction product
  • •Pigment in Printing Ink Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.14/gAaron Chemicals LLC
CountryHong Kong
Pack$68.00 / 500 g
Purity97%
Vendors20 available

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

19 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.15500 g97%
A2B Chem LLCUnited States$0.17500 g97%
AA BLOCKSUnited States$0.19500 g97%
BLD Pharmatech Ltd.China$0.211 kg97%
BLD Pharmatech GmbHGermany$0.21500 g97%
BLD Pharmatech Co., LimitedUnited States$0.231 kg97%
Ambeed, Inc.United States$0.231 kg97%
Combi-Blocks, Inc.United States$0.251 kg97%
Fluorochem UKUnited Kingdom$0.5125 g95%
AK Scientific, Inc.United States$0.67100 g99%
SynthonixUnited States$1.2025 g97%
AstaTech (2 weeks)United States$1.82100 g95%
Angene International LimitedUnited States$2.58250 g98%
Sigma-Aldrich (Rush Stock)Germany$6.1425 g98%
Sigma-AldrichGermany$6.1425 g98%
Labotest KGGermany$217.805000 mg90%
AngeneChina → Hong Kong$4266.6730 mg97%
AsinexNetherlands$6461.40100 mg90%
TimTec, LLC (back-ordered)United States$32000.0015 mg94%

Chemical Identity

CAS82799-44-8
PubChem CID122825
DTXSIDDTXSID2072883
FormulaC17H16OS
Mol. Weight268.4 g/mol
SMILESCCC1=CC(=C2C(=C1)C(=O)C3=CC=CC=C3S2)CC

Data Sources

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Brief citations

2,4-Diethyl-9H-thioxanthen-9-one (CAS 82799-44-8) https://chemicalindependence.com/chemical/82799-44-8/ EPA CompTox (DSSTox): DTXSID2072883. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2072883 PubChem: 122825. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/122825 EPA Chemical Data Reporting: 82799-44-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 82799-44-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293499 for CAS 82799-44-8. Reporting year: 2024. https://usatrade.census.gov/