Dimethyldi(octadecyl)ammonium methyl sulphate

CAS 3843-16-1

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$108M

Top sourceChina 14%

At least one company claimed its 2019 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: 2019. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 292390 · basket

EPA reports by year

2019: US production Confidential · Imports Confidential

These shares come from HS customs code 292390, which covers 130 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).

CN 14%ChinaGB 13%United KingdomDE 11%GermanyIN 10%IndiaTW 10%Taiwan

Israel
Indonesia
Sweden
Turkey
United Arab Emirates
Malaysia
Singapore
Lithuania
Brazil
Hong Kong
Australia
Belgium
Ukraine

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.

Vertellus

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS3843-16-1

PubChem CID77450

DTXSIDDTXSID3063209

FormulaC39H83NO4S

Mol. Weight662.1 g/mol

SMILESCCCCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCCCC.COS(=O)(=O)[O-]

Data Sources

EPA CompTox (DSSTox) · DTXSID3063209Retrieved 2026-04-06
PubChem · compound 77450Retrieved 2026-04-06
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

Dimethyldi(octadecyl)ammonium methyl sulphate (CAS 3843-16-1) https://chemicalindependence.com/chemical/3843-16-1/ EPA CompTox (DSSTox): DTXSID3063209. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3063209 PubChem: 77450. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/77450 EPA Chemical Data Reporting: 3843-16-1. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292390 for CAS 3843-16-1. Reporting year: 2024. https://usatrade.census.gov/