Black UL 1253

CAS 30785-74-1

Chromate(2-), [3-(hydroxy-κO)-4-[2-[2-(hydroxy-κO)-1-naphthalenyl]diazenyl-κN2]-1-naphthalenesulfonato(3-)][1-[2-[2-(hydroxy-κO)-5-[2-(4-methoxyphenyl)diazenyl]phenyl]diazenyl-κN2]-2-naphthalenolato(2-)-κO]-, sodium (1:2)

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

Molecular structure of 30785-74-1 — 2 Na⁺

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

CAS30785-74-1

PubChem CIDNot recorded

DTXSIDDTXSID70894059

FormulaC43H27CrN6Na2O8S

Mol. Weight885.76 g/mol

SMILES[Na+].[Na+].COC1=CC=C(C=C1)\N=N/C1=CC=C2[O-][Cr+3]3456[O-]C7=CC=C8C=CC=CC8=C7[N]3=NC3=C7C=CC=CC7=C(C=C3[O-]4)S([O-])(=O)=O.[O-]5C3=CC=C4C=CC=CC4=C3N=[N]6C2=C1

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04

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Brief citations

Black UL 1253 (CAS 30785-74-1) https://chemicalindependence.com/chemical/30785-74-1/ EPA TSCA Inventory: CAS 30785-74-1. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory