Tributyl phosphite

CAS 102-85-2

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

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import value, 2024$23M

Import volumeZero

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 Zero
2019: US production 46.2K lb · Imports Zero

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

Country of origin for US imports, from Census customs data (2024).

SG 52%SingaporeTW 12%TaiwanIT 9%ItalyGB 7%United KingdomES 7%Spain

Brunei
Poland

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Lanxess

Why It Matters

Sectors

Metals & Mining

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

•Intermediate in Other (100%)Processing as a reactant

Vendor Pricing

$0.30/gA2B Chem LLC

CountryUnited States

Pack$150.00 / 500 g

Purity93%

Vendors5 available

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

4 more vendors

Vendor	Country	$/g	Pack	Purity
Combi-Blocks, Inc.	United States	$0.30	500 g	93%
AA BLOCKS	United States	$0.35	500 g	93%
AstaTech, Inc	United States	$17.92	25 g	95%
Angene International Limited	United States	$48.60	5 g	95%

Chemical Identity

CAS102-85-2

PubChem CID7623

DTXSIDDTXSID7051474

FormulaC12H27O3P

Mol. Weight250.31 g/mol

SMILESCCCCOP(OCCCC)OCCCC

Data Sources

EPA CompTox (DSSTox) · DTXSID7051474Retrieved 2026-04-06
PubChem · compound 7623Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Tributyl phosphite (CAS 102-85-2) https://chemicalindependence.com/chemical/102-85-2/ EPA CompTox (DSSTox): DTXSID7051474. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7051474 PubChem: 7623. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/7623 EPA Chemical Data Reporting: 102-85-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 102-85-2. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292029 for CAS 102-85-2. Reporting year: 2024. https://usatrade.census.gov/