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Distearyl pentaerythritol diphosphite

CAS 3806-34-6

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

Molecular structure of 3806-34-6
US productionCBI
Import value, 2024$23M
Top sourceSingapore 52%

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 292029 · basket

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

These shares come from HS customs code 292029, which covers 28 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 52%SingaporeTW 12%TaiwanIT 9%ItalyGB 7%United KingdomES 7%Spain
EPA-registered manufacturers (1)
Dover Chemical
Domestic parents -- activity not disclosed (1)
Si Group
EPA-registered importers (2)
Lg Chem · KR South Korea
Lg Chem America

Why It Matters

Sectors
Plastics & Rubber
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 3 sectors as 3 functional roles.

  • •UV stabilizer in Plastics Material and Resin Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
  • •Antioxidant in Synthetic Rubber Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
  • •UV stabilizer in Synthetic Rubber Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
  • •Antioxidant in Plastics Material and Resin Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
  • •Stabilizing agent in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Antioxidant in Plastics Product Manufacturing (100%)Processing—incorporation into article

Vendor Pricing

$0.15/gA2B Chem LLC
CountryUnited States
Pack$154.00 / 1 kg
Purity98%
Vendors17 available

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

16 more vendors
VendorCountry$/gPackPurity
AA BLOCKSUnited States$0.171 kg98%
ChemsceneUnited States$0.221 kg—
BLD Pharmatech Co., LimitedUnited States$0.221 kg98%
BLD Pharmatech GmbHGermany$0.221 kg98%
BLD Pharmatech Ltd.China$0.221 kg98%
Ambeed, Inc.United States$0.221 kg98%
Aaron Chemicals LLCHong Kong$0.22500 g98%
Angene ChemicalChina → Hong Kong$0.24500 g98%
Combi-Blocks, Inc.United States$0.251 kg95%
AK Scientific, Inc.United States$0.36500 g—
Sigma-Aldrich (Rush Stock)Germany$0.78100 g—
Sigma-AldrichGermany$0.78100 g—
AstaTech, IncUnited States$2.83100 g95%
Angene International LimitedUnited States$9.8025 g95%
AK Scientific SpecializedUnited States$69.001 g—
AngeneChina → Hong Kong$4266.6730 mg98%

Chemical Identity

CAS3806-34-6
PubChem CID19645
DTXSIDDTXSID2027549
FormulaC41H82O6P2
Mol. Weight733 g/mol
SMILESCCCCCCCCCCCCCCCCCCOP1OCC2(CO1)COP(OC2)OCCCCCCCCCCCCCCCCCC

Data Sources

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Brief citations

Distearyl pentaerythritol diphosphite (CAS 3806-34-6) https://chemicalindependence.com/chemical/3806-34-6/ EPA CompTox (DSSTox): DTXSID2027549. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2027549 PubChem: 19645. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/19645 EPA Chemical Data Reporting: 3806-34-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3806-34-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292029 for CAS 3806-34-6. Reporting year: 2024. https://usatrade.census.gov/