SECTION 3.2: Mixtures
This section provides detailed information about the composition of mixtures and the concentration of their constituents. It is crucial for hazard assessment and safe handling of chemical products.
General Requirements
| Requirement | Description |
|---|---|
| Components Identification | All hazardous components must be listed when present above cut-off values |
| Concentration Ranges | Exact percentages or ranges must be provided according to CLP Article 31 |
| Classification | GHS/CLP classification for each component must be included |
Component Information Requirements
Required Details:
Chemical Identity:
- Chemical name
- CAS number
- EC number
- Index number (if applicable)
Concentration:
- Exact percentage when available
- Concentration range when exact values vary
- Maximum values for ranges
Classification:
- Hazard classes
- Category codes
- Hazard statements
Concentration Thresholds
| Hazard Class | Threshold (%) |
|---|---|
| Acute Toxicity | ≥ 0.1 |
| Skin Corrosion/Irritation | ≥ 1.0 |
| Serious Eye Damage/Irritation | ≥ 1.0 |
| Respiratory/Skin Sensitization | ≥ 0.1 |
| Carcinogenicity | ≥ 0.1 |
Example Format
| Substance Name | CAS No. | EC No. | Concentration | Classification |
|---|---|---|---|---|
| Ethanol | 64-17-5 | 200-578-6 | 50-75% | Flam. Liq. 2, H225 |
| Isopropanol | 67-63-0 | 200-661-7 | 10-25% | Flam. Liq. 2, H225; Eye Irrit. 2, H319; STOT SE 3, H336 |
For complex mixtures, additional tables may be needed to present all required information clearly.
Real-World Example
Special Cases
| Case | Requirement |
|---|---|
| Trade Secrets | Generic chemical descriptors may be used if approved by competent authority |
| Variable Composition | Ranges must reflect actual variation in composition |
| UFI Code | Unique Formula Identifier required for hazardous mixtures in EU market |
Documentation Requirements
- Keep records of composition calculations
- Document justification for concentration ranges
- Maintain evidence of compliance with disclosure requirements
- Update when composition changes exceed specified limits
Note: All component concentrations must sum to 100% when including non-hazardous components.
This section must be updated whenever the composition changes in a way that affects the hazard classification or when new toxicological information becomes available.