C.I. Acid Red 52

CAS 3520-42-1

Companies reported imports and no US production of this chemical to EPA for 2023.

Molecular structure of 3520-42-1 — 1 Na⁺

US productionZero

Import value, 2024$56M

Import volume181.0K lb

Import dependency100%

Top sourceIndia 70%

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

C.I. Acid Red 52 · US import value by year

2013: $63M · Peak 2022: $90M · 2024: $56M · 2025: $58M

Where It Comes From

Customs basis: HS 320412 · basket

EPA reports by year

2023: US production Zero · Imports 181.0K lb
2019: US production Zero · Imports Zero

These shares come from HS customs code 320412, which covers 106 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).

IN 70%IndiaMY 7%MalaysiaCH 4%SwitzerlandCN 4%ChinaDE 3%Germany

Ireland
United Kingdom
Spain
South Korea
Denmark
Pakistan
Hong Kong
Czech Republic
Brazil
Turkey

EPA-registered importers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Target

Why It Matters

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

Vendor Pricing

$0.20/gAaron Chemicals LLC

CountryHong Kong

Pack$101.00 / 500 g

Purity70%

Vendors11 available

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

10 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$0.24	500 g	70%
BLD Pharmatech Ltd.	China	$0.32	500 g	70%
A2B Chem LLC	United States	$0.38	100 g	—
AA BLOCKS	United States	$0.47	100 g	—
BLD Pharmatech GmbH	Germany	$1.16	25 g	70%
Angene International Limited	United States	$16.64	25 g	—
BLD Pharmatech Co., Limited	United States	$200.00	100 mg	70%
Ambeed, Inc.	United States	$200.00	100 mg	70%
Angene	China → Hong Kong	$4266.67	30 mg	70%
Cayman Europe	Estonia	$8829.80	50 mg	75%

Chemical Identity

CAS3520-42-1

PubChem CID9916275

DTXSIDDTXSID7021235

FormulaC27H29N2NaO7S2

Mol. Weight580.7 g/mol

SMILESCCN(CC)C1=CC2=C(C=C1)C(=C3C=CC(=[N+](CC)CC)C=C3O2)C4=C(C=C(C=C4)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+]

Data Sources

EPA CompTox (DSSTox) · DTXSID7021235Retrieved 2026-04-06
PubChem · compound 9916275Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

C.I. Acid Red 52 (CAS 3520-42-1) https://chemicalindependence.com/chemical/3520-42-1/ EPA CompTox (DSSTox): DTXSID7021235. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7021235 PubChem: 9916275. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/9916275 EPA Chemical Data Reporting: 3520-42-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 320412 for CAS 3520-42-1. Reporting year: 2024. https://usatrade.census.gov/