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Diphenylsulfone

CAS 127-63-9

Used in 3 industrial sectors tracked by the EPA.

Molecular structure of 127-63-9
US production98.1K lb
Import value, 2024$760M
Import volumeCBI
Top sourceChina 33%

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 293090 · basket

EPA reports by year
2023
US production 98.1K lb · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 293090, which covers 418 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 33%ChinaES 14%SpainCH 9%SwitzerlandIT 7%ItalyIN 7%India
EPA-registered manufacturers (1)
Proviron
Domestic parents -- activity not disclosed (1)
Solvay
EPA-registered importers (2)
Syensqo Sa · BE Belgium
Ricoh Electronics

Why It Matters

Sectors
Plastics & RubberPaper & PrintingCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 3 sectors as 2 functional roles.

  • •Solvent in Plastics Product Manufacturing (100%)Processing as a reactant
  • •Solvent in Paper Manufacturing (100%)Processing—incorporation into article
  • •Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Use—non-incorporative activities

Vendor Pricing

$0.02/gAaron Chemicals LLC
CountryHong Kong
Pack$10.00 / 500 g
Purity98%
Vendors26 available

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

25 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.03500 g99%
BLD Pharmatech GmbHGermany$0.031 kg98%
BLD Pharmatech Ltd.China$0.031 kg98%
A2B Chem LLCUnited States$0.04500 g97%
AA BLOCKSUnited States$0.04500 g97%
ChemsceneUnited States$0.051 kg—
Fluorochem EUGermany$0.061 kg97%
AK Scientific SpecializedUnited States$0.08500 g98%
BLD Pharmatech Co., LimitedUnited States$0.111 kg98%
Ambeed, Inc.United States$0.111 kg98%
AK Scientific, Inc.United States$0.11500 g99%
ALFA AESARGermany$0.121 kg99%
MedChemExpress MCESweden$0.19500 g99.97%
Angene International LimitedUnited States$0.24500 g99%
Combi-Blocks, Inc.United States$0.251 kg98%
AstaTech, IncUnited States$0.69100 g95%
Labotest KGGermany$217.805000 mg90%
Sigma-Aldrich (Rush Stock)Germany$353.80100 mg—
Sigma-AldrichGermany$353.80100 mg—
SpecsNetherlands$794.005 g90%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
Vitas M Chemical LimitedHong Kong$3170.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg98%
ChemDiv, Inc.United States$4400.0090 mg90%
TimTec, LLC (back-ordered)United States$32000.0015 mg94%

Chemical Identity

CAS127-63-9
PubChem CID31386
DTXSIDDTXSID6041892
FormulaC12H10O2S
Mol. Weight218.27 g/mol
SMILESC1=CC=C(C=C1)S(=O)(=O)C2=CC=CC=C2

Data Sources

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Brief citations

Diphenylsulfone (CAS 127-63-9) https://chemicalindependence.com/chemical/127-63-9/ EPA CompTox (DSSTox): DTXSID6041892. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6041892 PubChem: 31386. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/31386 EPA Chemical Data Reporting: 127-63-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 127-63-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293090 for CAS 127-63-9. Reporting year: 2024. https://usatrade.census.gov/