Alcian Blue 8GS

CAS 33864-99-2

Copper(4+), [[N,N',N'',N'''-[(29H,31H-phthalocyanine-C,C,C,C-tetrayl-κN29,κN30,κN31,κN32)tetrakis[methylenethio[(dimethylamino)methylidyne]]]tetrakis[N-methylmethanaminiumato]](2-)]-, chloride (1:4)

EPA and Census publish no US supply data for this chemical.

Molecular structure of 33864-99-2 — 4 Cl⁻ · 1 Cu⁴⁺

US productionNot reported

Top sourceNo public record

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

Where It Comes From

EPA and Census publish no US supply data for this chemical.

Why It Matters

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

Chemical Identity

CAS33864-99-2

PubChem CIDNot recorded

DTXSIDDTXSID401014626

FormulaC56H68Cl4CuN16S4

Mol. Weight1298.86 g/mol

SMILES[Cl-].[Cl-].[Cl-].[Cl-].[Cu+4].CN(C)C(SCC1=CC2=C(C=C1)/C1=N/C3=N/C(=N\C4=C5C=C(CSC(N(C)C)=[N+](C)C)C=CC5=C([N-]4)/N=C4\N=C(\N=C\2/[N-]\1)C1=CC=C(CSC(N(C)C)=[N+](C)C)C=C41)/C1=C3C=CC(CSC(N(C)C)=[N+](C)C)=C1)=[N+](C)C

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04

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Brief citations

Alcian Blue 8GS (CAS 33864-99-2) https://chemicalindependence.com/chemical/33864-99-2/ EPA TSCA Inventory: CAS 33864-99-2. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory