Synthetic Ruby

INCI: SYNTHETIC RUBY

CAS Number
12174-49-1 (aluminum oxide / corundum with chromium)
Function
Bulking, Opacifying (analogous to synthetic sapphire — both are corundum-based)
Safety Rating
GOOD

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes Permitted for cosmetic use; aluminum oxide is GRAS

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
negligible
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Chromium content (gives red color) should be verified as Cr₂O₃ (trivalent, safe) and not hexavalent chromium; particle size assessment needed for nano considerations

⚠️
Concern Level: Low

Frequently Asked Questions

Is Synthetic Ruby safe in cosmetics?

Chromium content (gives red color) should be verified as Cr₂O₃ (trivalent, safe) and not hexavalent chromium; particle size assessment needed for nano considerations The EU classifies Synthetic Ruby as "permitted". Safety rating: GOOD.

Is Synthetic Ruby allowed in the EU?

Synthetic Ruby EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Synthetic Ruby do in cosmetics?

Synthetic Ruby functions as: Bulking, Opacifying (analogous to synthetic sapphire — both are corundum-based). It is classified as a cosmetic ingredient in our database. CAS number: 12174-49-1 (aluminum oxide / corundum with chromium).

What is the Margin of Safety for Synthetic Ruby?

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

📱

Is Synthetic Ruby in Your Products?

Scan any product label with Piro — our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.

Try Piro Free →

Analyze Your Full Ingredient List

Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Synthetic Ruby in your formulation.