chromium oxide green, as a ceramic glaze and food contact material colorant, can be used for coloring food containers, tableware, and kitchenware when meeting specific migration limits. Major markets including the EU, US, and Germany have relevant regulations governing food contact ceramic colorants.
EU Food Contact Regulations
EU Directive 84/500/EEC (Ceramic Products): Specifies lead and cadmium migration limits in ceramic products. While chromium oxide green itself is not subject to these restrictions, product purity must be ensured.
EU Regulation 1935/2004/EC: General food contact materials regulation requiring materials not to endanger human health or alter food characteristics.
German LFGB Standard
German LFGB (Food, Tobacco Products, Cosmetics and Other Consumer Goods Act) imposes strict requirements on food contact materials:
Test Item LFGB Requirement VerdeChrome® Status Sensory Test No off-odor, no color migration ✅ Pass Heavy Metal Migration Complies with limits ✅ Pass Chromium Migration Specific limits ✅ Complies
US FDA 21 CFR
FDA regulations for food contact ceramic glaze colorants:
- 21 CFR 73.2327: chromium oxide green approved as external cosmetic colorant
- 21 CFR 175.300: Colorants in resin and polymer coatings
- Ceramic Glazes: Must pass heavy metal migration testing
Application Safety of chromium oxide green in Ceramics
chromium oxide green in ceramic glazes offers the following safety advantages:
- High-Temperature Firing Stability: After firing at 1000-1300°C, Cr₂O₃ forms stable glass phase with glaze, fixing chromium
- Low Migration: Post-firing chromium migration is extremely low, meeting food contact standards
- No Hexavalent Chromium Risk: Firing process does not oxidize Cr(III) to Cr(VI)
- Historical Safety Record: chromium oxide green has been used for ceramic coloring for decades with no safety incidents
VerdeChrome® Food Contact Grade Products
We provide VerdeChrome® products specifically designed for food contact applications:
- High purity (Cr₂O₃ ≥99.5%), low impurities
- Heavy metal migration test reports provided
- Complies with EU, US, and German food contact standards
- Technical support: firing process optimization recommendations
Application Guidelines
To ensure food contact safety:
- Use high-purity chromium oxide green (≥99%)
- Ensure correct glaze formulation and firing process
- Conduct heavy metal migration testing on finished products
- Maintain test reports and compliance declarations
Request food contact grade products and test reports
Reference Regulations: 84/500/EEC, 1935/2004/EC, LFGB §30-31, FDA 21 CFR
