Flag of the United StatesAmerican Chemical Independence

Dimethyl phthalate

Drug ingredient

CAS 131-11-3

This drug ingredient has classified U.S. production volumes. EPA withholds the number as confidential business information.

Molecular structure of 131-11-3
US productionCBI
Import value, 2024$28M
Top sourceIndia 39%

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 291734 · basket

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

These shares come from HS customs code 291734, which covers 34 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IN 39%IndiaCA 27%CanadaKR 8%South KoreaJP 6%JapanDE 6%Germany
EPA-registered importers (7)
Basf Se · DE Germany
United Initiators Gmbh · DE Germany
Basf
Industrial Chemicals
Mak Chemicals
Show all 7
Nalco- An Ecolab
United Initiators
1 FDA-registered drug labeler
Professional Complementary Health Formulas

Why It Matters

Sectors
HealthPlastics & RubberCore Chemicals
Downstream Uses

Appears in 1 drug and cosmetic product listings (FDA).

  • •Glyoxal Combination 9303
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 5 sectors as 3 functional roles.

  • •Plasticizer in Plastics Material and Resin ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Plasticizer in Plastics Product ManufacturingProcessing—incorporation into article
  • •CBI in CBICBI
  • •Intermediate in All Other Chemical Product and Preparation Manufacturing (100%)Processing as a reactant
  • •Intermediate in Plastics Product Manufacturing (100%)Processing as a reactant
  • •Intermediate in All Other Basic Organic Chemical ManufacturingProcessing as a reactant

Vendor Pricing

$0.01/gAaron Chemicals LLC
CountryHong Kong
Pack$5.00 / 500 g
Purity99%
Vendors23 available

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

22 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.02500 g99%
Sigma-Aldrich (Rush Stock)Germany$0.0225 kg99%
Sigma-AldrichGermany$0.0225 kg99%
BLD Pharmatech GmbHGermany$0.031 kg99%
BLD Pharmatech Ltd.China$0.031 kg99%
A2B Chem LLCUnited States$0.03500 g99%
AA BLOCKSUnited States$0.03500 g99%
ALFA AESARGermany$0.042.5 kg99%
Fluorochem UKUnited Kingdom$0.07500 g98%
AK Scientific, Inc.United States$0.17500 g99%
MedChemExpress MCESweden$0.17500 g99.87%
Combi-Blocks, Inc.United States$0.251 kg99%
Angene International LimitedUnited States$0.28100 g98%
AstaTech (2 weeks)United States$2.0025 g95%
MedKoo Biosciences, IncUnited States$10.0025 g98%
AK Scientific SpecializedUnited States$19.405 g99.5%
Labotest KGGermany$217.805000 mg90%
ChemFacesChina$1500.0020 mg98%
Otava, Ltd.Ukraine$2280.0050 mg95%
Otava, Ltd. (2 weeks)Ukraine$2724.0050 mg95%
Key Organics Ltd.United Kingdom$2740.0050 mg95%
AngeneChina → Hong Kong$4266.6730 mg99%

Chemical Identity

CAS131-11-3
PubChem CID8554
DTXSIDDTXSID3022455
FormulaC10H10O4
Mol. Weight194.18 g/mol
SMILESCOC(=O)C1=CC=CC=C1C(=O)OC

Data Sources

← Back to Dashboard← Back to Health

Brief citations

Dimethyl phthalate (CAS 131-11-3) https://chemicalindependence.com/chemical/131-11-3/ EPA CompTox (DSSTox): DTXSID3022455. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3022455 PubChem: 8554. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/8554 EPA Chemical Data Reporting: 131-11-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting FDA National Drug Code directory: CAS 131-11-3. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 291734 for CAS 131-11-3. Reporting year: 2024. https://usatrade.census.gov/