9-Octadecenoic acid (9Z)-, magnesium salt

CAS 1555-53-9

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

Molecular structure of 1555-53-9 — 1 Mg²⁺

US productionCBI

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

Import value, 2024$10M

Import volumeZero

Top sourceIndia 25%

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 291615 · basket

EPA reports by year

2023: US production Confidential · Imports Zero
2019: US production Confidential · Imports Zero

These shares come from HS customs code 291615, which covers 71 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).

IN 25%IndiaIT 19%ItalyID 15%IndonesiaDE 8%GermanyCN 8%China

Canada
Belgium
Sweden
Netherlands
Israel
Spain

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.

Dow Chemical

Why It Matters

Sectors

Plastics & Rubber

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

•Plasticizer in Plastics Material and Resin Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS1555-53-9

PubChem CID6433282

DTXSIDDTXSID7061772

FormulaC36H66MgO4

Mol. Weight587.2 g/mol

SMILESCCCCCCCCC=CCCCCCCCC(=O)[O-].CCCCCCCCC=CCCCCCCCC(=O)[O-].[Mg+2]

Data Sources

EPA CompTox (DSSTox) · DTXSID7061772Retrieved 2026-04-06
PubChem · compound 6433282Retrieved 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

9-Octadecenoic acid (9Z)-, magnesium salt (CAS 1555-53-9) https://chemicalindependence.com/chemical/1555-53-9/ EPA CompTox (DSSTox): DTXSID7061772. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7061772 PubChem: 6433282. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6433282 EPA Chemical Data Reporting: 1555-53-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1555-53-9. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291615 for CAS 1555-53-9. Reporting year: 2024. https://usatrade.census.gov/