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Vat Blue 4

CAS 81-77-6

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

Molecular structure of 81-77-6
US productionCBI
Import value, 2024$9M
Top sourceIndia 67%

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 320415 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 320415, which covers 10 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IN 67%IndiaCN 14%ChinaNL 9%NetherlandsJP 5%JapanID 2%Indonesia
EPA-registered manufacturers (1)
Forth Technologies
EPA-registered importers (4)
Basf Se · DE Germany
Heubach Holdings Sarl · LU Luxembourg
Basf
Hct

Why It Matters

Sectors
TransportationPlastics & RubberTextilesPaints & CoatingsPaper & Printing
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 6 sectors as 2 functional roles.

  • •Pigment in Synthetic Dye and Pigment Manufacturing (100%)Processing—repackaging
  • •Dye in Printing and Related Support Activities (5%)Processing—incorporation into formulation, mixture, or reaction product
  • •Pigment in Paint and Coating ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Pigment in Transportation Equipment ManufacturingProcessing—incorporation into article
  • •Pigment in Plastics Material and Resin Manufacturing (20%)Processing—incorporation into formulation, mixture, or reaction product
  • •Pigment in Printing Ink Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.34/gAaron Chemicals LLC
CountryHong Kong
Pack$169.00 / 500 g
PurityNot recorded
Vendors14 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

13 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.42400 g—
BLD Pharmatech GmbHGermany$0.51500 g—
BLD Pharmatech Ltd.China$0.51500 g—
Ambeed, Inc.United States$0.51500 g—
BLD Pharmatech Co., LimitedUnited States$0.74100 g—
A2B Chem LLCUnited States$0.7625 g—
AA BLOCKSUnited States$0.8425 g95%
AK Scientific, Inc.United States$1.26100 g—
Angene International LimitedUnited States$2.29100 g—
AngeneChina → Hong Kong$4266.6730 mg—
AsinexNetherlands$12100.0030 mg90%
ChemBridge CorporationKazakhstan$12500.0010 mg90%
TimTec, LLC (back-ordered)United States$32000.0015 mg94%

Chemical Identity

CAS81-77-6
PubChem CID6690
DTXSIDDTXSID2026280
FormulaC28H14N2O4
Mol. Weight442.4 g/mol
SMILESC1=CC=C2C(=C1)C(=O)C3=C(C2=O)C4=C(C=C3)NC5=C(N4)C=CC6=C5C(=O)C7=CC=CC=C7C6=O

Data Sources

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Brief citations

Vat Blue 4 (CAS 81-77-6) https://chemicalindependence.com/chemical/81-77-6/ EPA CompTox (DSSTox): DTXSID2026280. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2026280 PubChem: 6690. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6690 EPA Chemical Data Reporting: 81-77-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 81-77-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 320415 for CAS 81-77-6. Reporting year: 2024. https://usatrade.census.gov/