Tripropan-2-yl phosphite

CAS 116-17-6

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 81.5K 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

Health

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 Pharmaceutical and Medicine Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS116-17-6

PubChem CID8304

DTXSIDDTXSID9044372

FormulaC9H21O3P

Mol. Weight208.23 g/mol

SMILESCC(C)OP(OC(C)C)OC(C)C

Data Sources

EPA CompTox (DSSTox) · DTXSID9044372Retrieved 2026-04-06
PubChem · compound 8304Retrieved 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

Tripropan-2-yl phosphite (CAS 116-17-6) https://chemicalindependence.com/chemical/116-17-6/ EPA CompTox (DSSTox): DTXSID9044372. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9044372 PubChem: 8304. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/8304 EPA Chemical Data Reporting: 116-17-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 116-17-6. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292029 for CAS 116-17-6. Reporting year: 2024. https://usatrade.census.gov/