9.2. Other Information
Section 9.2 of the Safety Data Sheet (SDS) provides supplementary physical and chemical properties beyond the basic properties listed in Section 9.1. This additional information enhances understanding of the substance or mixture's behavior, supports proper risk assessment, and aids in determining appropriate handling, storage, and disposal procedures.
Additional Physical Properties
These properties provide further insights into the physical characteristics and behavior of the substance.
- Surface Tension: 28 mN/m at 20°C
- Particle Size Distribution: Not applicable (liquid)
- Viscosity: 15 mPa·s at 20°C
- Conductivity: 2.5 μS/cm at 20°C
Thermal Properties
These properties describe how the substance interacts with and responds to heat.
- Heat of Vaporization: 450 kJ/kg
- Thermal Conductivity: 0.15 W/(m·K)
- Specific Heat Capacity: 2.1 J/(g·K)
- Thermal Expansion Coefficient: 0.001 K⁻¹
Optical Properties
These properties describe how the substance interacts with light.
- Refractive Index: 1.423 at 20°C
- Light Transmission: >95%
- UV Absorption: Minimal below 290 nm
- Optical Rotation: Not applicable
Supplementary Safety Information
These properties provide additional information relevant to safety assessment.
- Dust Explosion Properties: Not applicable
- Minimum Ignition Energy: Not determined
- VOC Content: <5%
- Evaporation Rate: 0.7 (butyl acetate = 1)
Regulatory Significance of Section 9.2
Several properties in Section 9.2 have specific regulatory implications:
- VOC Content: Regulated under air quality regulations in many jurisdictions (e.g., EU Directive 2004/42/CE, US EPA regulations, CARB rules)
- Particle Size Distribution: Critical for nanomaterial identification and regulation (e.g., EU REACH nano registration requirements)
- Dust Explosion Properties: Required for compliance with workplace safety regulations for combustible dusts (e.g., NFPA 652, ATEX Directive)
- Conductivity: Important for determining static electricity hazards and appropriate handling procedures
- Surface Tension: Relevant for environmental fate assessment and classification of surfactants
Recent Regulatory Updates
The EU Commission Regulation 2020/878 (amending REACH Annex II) has introduced new requirements for Section 9.2, dividing it into two subsections:
- 9.2.1 Information with regard to physical hazard classes: Additional information relevant to physical hazard classifications that is not already listed in Section 9.1
- 9.2.2 Other safety characteristics: Other safety characteristics such as oxidizing properties, explosive properties, mechanical sensitivity, self-accelerating polymerization temperature, formation of explosible dust-air mixtures, acid/alkaline reserve, evaporation rate, miscibility, conductivity, corrosiveness, gas group, redox potential, radical formation potential, and photocatalytic properties
These changes must be implemented in all SDSs to ensure compliance with the latest regulations.
Importance for Different Applications
The additional properties in Section 9.2 are particularly important for specific applications:
| Property | Relevant Applications | Importance |
|---|---|---|
| Surface Tension | Coatings, cleaning products, pesticides | Affects spreading, wetting, and adhesion properties |
| Particle Size Distribution | Powders, suspensions, aerosols | Determines inhalation hazards, reactivity, and dissolution rate |
| Conductivity | Flammable liquids, electronic applications | Critical for static electricity hazard assessment |
| Thermal Properties | Process design, heat transfer applications | Essential for equipment sizing and safety margins |
| Refractive Index | Quality control, optical applications | Used for identification and purity assessment |
| VOC Content | Paints, coatings, adhesives, cleaning products | Required for regulatory compliance and environmental impact assessment |
| Evaporation Rate | Solvents, coatings, cleaning products | Affects drying time, worker exposure, and fire hazards |
Example of Complete Section 9.2 Entry (EU Format)
9.2.1 Information with regard to physical hazard classes
| Property | Value | Method/Notes |
|---|---|---|
| Explosives | Not applicable | Classification criteria not met |
| Flammable gases | Not applicable | Product is not a gas |
| Aerosols | Not applicable | Product is not an aerosol |
| Oxidizing gases | Not applicable | Product is not a gas |
| Gases under pressure | Not applicable | Product is not a gas |
| Flammable liquids | Category 3 | Based on flash point and boiling point |
| Flammable solids | Not applicable | Product is not a solid |
| Self-reactive substances | Not applicable | No self-reactive chemical groups present |
| Pyrophoric liquids | Not applicable | Product is stable in air |
| Pyrophoric solids | Not applicable | Product is not a solid |
| Self-heating substances | Not applicable | Product does not self-heat |
| Substances which emit flammable gases in contact with water | Not applicable | Product does not react with water |
| Oxidizing liquids | Not applicable | Product is not an oxidizer |
| Oxidizing solids | Not applicable | Product is not a solid |
| Organic peroxides | Not applicable | Product is not an organic peroxide |
| Corrosive to metals | Not applicable | Product is not corrosive to metals |
| Desensitized explosives | Not applicable | Product is not an explosive |
9.2.2 Other safety characteristics
| Property | Value | Method/Notes |
|---|---|---|
| Surface tension | 28 mN/m at 20°C | Du Noüy ring method |
| Conductivity | 2.5 μS/cm at 20°C | ASTM D1125 |
| Evaporation rate | 0.7 (butyl acetate = 1) | ASTM D3539 |
| VOC content | <5% | EPA Method 24 |
| Refractive index | 1.423 at 20°C | ASTM D1218 |
| Heat of vaporization | 450 kJ/kg | Calculated |
| Thermal conductivity | 0.15 W/(m·K) | ASTM D2717 |
| Specific heat capacity | 2.1 J/(g·K) | ASTM E1269 |
| Thermal expansion coefficient | 0.001 K⁻¹ | ASTM E831 |
| Light transmission | >95% | Spectrophotometric method |
| UV absorption | Minimal below 290 nm | UV-Vis spectroscopy |
| Dust explosion properties | Not applicable | Product is a liquid |
| Minimum ignition energy | Not determined | - |
Quality Assurance Checklist for Section 9.2
- All relevant additional properties are included with appropriate units
- Test methods or standards are specified where applicable
- Temperature and pressure conditions are specified for relevant properties
- "Not applicable" or "Not available" is used with justification where appropriate
- For EU SDSs, information is properly organized into subsections 9.2.1 and 9.2.2
- Properties are reported using appropriate significant figures
- Information is consistent with other sections of the SDS
- Regulatory-required properties (e.g., VOC content) are accurately reported
Best Practices
When preparing Section 9.2 of an SDS:
- Include properties relevant to the specific substance or mixture and its intended uses
- Ensure compliance with the latest regulatory requirements for SDS format
- Provide values in SI units with appropriate conversions if needed
- Specify test conditions (temperature, pressure) for all measurements
- Include properties required by specific regulations (e.g., VOC content for coatings)
- For complex mixtures, provide ranges or representative values as appropriate
- Update property data when formulations change or new test data becomes available
Note: These properties are provided for supplementary information only and should not be considered as product specifications. The properties listed above are for illustrative purposes and should be replaced with actual data for the specific substance or mixture.