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Diisodecyl phenyl phosphate

CAS 51363-64-5

Phosphoric acid, diisodecyl phenyl ester

Molecular structure of 51363-64-5
US productionNot reported
Import value, 2024$123M
Top sourceChina 66%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 291990 · basket

These shares come from HS customs code 291990, which covers 77 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 66%ChinaDE 18%GermanyJP 5%JapanIN 3%IndiaCH 3%Switzerland

Why It Matters

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

Chemical Identity

CAS51363-64-5
PubChem CIDNot recorded
DTXSIDDTXSID2052150
FormulaC26H47O4P
Mol. Weight454.632 g/mol
SMILESC*.C*.CCCCCCCCCOP(=O)(OCCCCCCCCC)OC1=CC=CC=C1 |c:27,29,t:25,lp:13:2,15:2,16:2,26:2,m:1:17.18.19.20.21.22.23.24,3:12.11.10.9.8.7.6.5|

Data Sources

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Brief citations

Diisodecyl phenyl phosphate (CAS 51363-64-5) https://chemicalindependence.com/chemical/51363-64-5/ EPA TSCA Inventory: CAS 51363-64-5. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 291990 for CAS 51363-64-5. Reporting year: 2024. https://usatrade.census.gov/