Is D&C red no. 33 free acid safe?

We haven't assessed a concern score for this ingredient yet.

D&C red no. 33 free acid

CAS 2203-16-9

Concern score

Not assessed — no hazard data yet.

D&C red no. 33 free acid in plain language

What it is: Also known as 1-Naphthol-3,6-disulfonic acid, 8-amino-2-phenylazo- · Acid Fuchsin Fast B · Acid fuchsine D · C.I. 17200 · C.I. Food Red 12 · D and C Red No. 33
Show all 9 names
D&C Red No. 33 Parent · Fast acid magenta · UNII-942D1H6FKF
What it does: We don't have a plain-language description for D&C red no. 33 free acid yet.
Is it a concern?: We haven't assessed a concern score for this ingredient yet.

What we know about this ingredient

EPA DSSTox provides the canonical identifier, structure, and synonym profile for this chemical.

Regulation

No restrictions found. D&C red no. 33 free acid appears in these published regulatory listings.

USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →

Evidence & sources

No graded research studies for D&C red no. 33 free acid yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

4 data sources

Where this comes from

EPA DSSTox Identifiers
chemistry · updated 2025-12-29
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FDA GSRS UNII
registry · updated 2026-02-26
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openFDA Substance
registry · updated 2026-05-24
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PubChem Live Enrichment
chemistry · updated 2026-05-17
Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Catalog

Found in these products

Their ingredient lists include D&C red no. 33 free acid; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 12 →Find products without it →