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Sudan Yellow — Reference Materials for Reliable Residue Analysis
Sudan Yellow Precision Reference Materials for Confident Compliance
Safeguard your spice and edible oil testing with HPC Standards high-purity Sudan Yellow reference materials. Engineered for complex, lipid-rich matrices, our neat substances and ready-to-use solutions enable validated LC-UVVis and LC-MSMS quantification at low gkg. Achieve robust recoveries, traceable calibration including isotope-dilution where available, and defensible results aligned with ISOIEC 17025. Benefit from batch-specific COAs, optional matrix-matched solutions, and expert technical supportfrom method selection to cleanup optimizationso you can meet zero-tolerance regulations and accelerate release decisions with confidence.
Product | Catalog No./ CAS No. | Quantity | Price | |
|---|---|---|---|---|
 | 691960 | 1X10MG | Please log in. | |
ISO 17034 Certified Reference Material D5-Sudan Yellow solution |  | 691961 | 1X1ML | |
ISO 17034 Reference Material |  | 680059 | 1X250MG | Please log in. |
HPC Standards provides high-quality reference materials for Sudan Yellow to support validated, traceable quantification in food and environmental matrices. Ensure compliance, method robustness, and defensible results across complex lipid-rich and spice samples.
Overview
Sudan Yellow refers to a class of lipophilic solvent dyes (azo dyes) used industrially as colorants for oils, waxes, plastics, and related materials. These compounds are not permitted for use in foods in many jurisdictions due to toxicological concerns. Analytical surveillance focuses on their illicit addition to spices, chili products, and edible oils.
Key characteristics include high hydrophobicity, strong visible absorption, and good solubility in nonpolar matrices, which challenges extraction and cleanup in routine monitoring.
Uses
- Industrial colorant for oils, waxes, hydrocarbon-based materials, plastics, and polishes.
- Laboratory staining of lipids and hydrophobic domains (research/forensic contexts).
- Not approved as a food colorant; detections in spices or oils typically indicate adulteration.
Regulatory
- Prohibited in food in the EU, US, and many other jurisdictions; non-compliance often treated as zero-tolerance with actions triggered at the method limit of quantification.
- Subject to border controls and rapid alert notifications due to recurring findings in chili, curry, paprika, and palm oil products.
- Laboratories should align with ISO/IEC 17025, employ validated methods, and use fit-for-purpose reference materials for traceability and uncertainty estimation.
Monitoring
- Targeted surveillance in high-risk commodities: ground spices, spice mixes, chili sauces, curry pastes, paprika, and edible oils.
- Risk-based sampling plans emphasize supply chains with prior non-compliance and products with intense red/yellow coloration.
- Routine incorporation of system suitability checks, matrix-matched calibration, and participation in proficiency testing is recommended.
Analytical Methods
- LC-UV/Vis or LC-DAD for screening; LC-MS/MS or HRMS for confirmation and quantification.
- Typical sample prep: solvent extraction (e.g., acetonitrile, acetone, or hexane-based), followed by cleanup using SPE (silica, C18, or PSA) tailored to lipid content. QuEChERS variants are widely applied for spices.
- Validation targets: selectivity in colored, fatty matrices; recovery 70–120%; RSD ≤20% at low µg/kg; LOQ typically in the low µg/kg range, depending on matrix.
Sample Preparation Considerations
- Strong matrix effects in spices and oils necessitate matrix-matched calibration or isotope dilution (where available).
- Protect extracts from light; azo dyes can photo-degrade or isomerize.
- Use amber glassware and minimize evaporation losses of co-extracted volatiles.
Analytical Performance and QA/QC
- Include solvent blanks, matrix blanks, and fortified recovery samples in each batch.
- Employ independent calibration verification and system suitability tests at relevant wavelengths.
- Document measurement uncertainty based on within-lab reproducibility, calibration model, and reference material uncertainty.
Health Impact
- Azo dyes in the Sudan Yellow class are associated with toxicological concerns, including potential carcinogenicity and the formation of aromatic amines upon metabolic reduction.
- Acute exposure is generally low-risk at trace levels, but chronic dietary exposure is of regulatory concern, prompting prohibitions in foods.
Environmental Impact
- Persistent in the environment due to hydrophobicity; tendency to partition into sediments and organic phases.
- Potential toxicity to aquatic organisms; limited biodegradability implies monitoring in industrial effluents where dyes are used.
Safety Measures
- Handle solids and solutions with appropriate PPE (lab coat, nitrile gloves, eye protection) and work in a fume hood to avoid dust or aerosol exposure.
- Prevent cross-contamination by dedicating glassware/pipettes for dye analysis and using separate preparation areas from routine LC-MS pesticide work.
- Dispose of dye-containing waste according to local hazardous waste regulations.
Storage and Stability
- Store reference materials in tightly sealed amber containers, protected from light, ideally at 2–8 °C unless otherwise specified on the certificate.
- Allow solutions to equilibrate to room temperature before opening to prevent condensation; record opening date and monitor expiry.
Applications
- Official control laboratories, contract testing labs, spice and oil processors, importers, and retailers.
- Method development, validation, routine QC, proficiency testing support, and confirmatory analysis.
Analytical Standards
- HPC Standards supplies Sudan Yellow reference materials as neat substances and ready-to-use solutions at defined concentrations, with batch-specific certificates of analysis.
- Optional matrix-matched solutions and custom mixes for multi-dye screening in spices and oils.
- Where available, stable isotope-labelled analogues support isotope-dilution quantification and improved measurement uncertainty.
Documentation and Traceability
- Each reference material is accompanied by a certificate detailing identity, purity, concentration (for solutions), uncertainty, and storage conditions.
- Produced and tested according to international quality requirements to support compliance with ISO/IEC 17025 and related guidelines.
Why HPC Standards
- Specialized portfolio for dyes, pesticides, veterinary drugs, metabolites, and isotope-labelled derivatives.
- Technical support for method selection, sample prep optimization, and calibration strategies in challenging matrices.
- Reliable lead times, secure packaging, and temperature-controlled shipping to maintain integrity.