Density analysis services | FILAB analytical Laboratory
Would you like to perform a density analysis on your materials?
The density of a material corresponds to the ratio between its mass and its volume.
It reflects the compactness of the material and provides information about its internal structure, porosity, composition and homogeneity.
This physical property, studied in materials characterization, varies depending on the nature of the matrix (liquid, bulk solid, powder).
Professional density testing solutions for your formulations and materials
As a COFRAC ISO 17025 accredited laboratory based in France, our team of over 140 analytical experts provides precise, reproducible density testing essential for quality control, regulatory compliance, and product development.
With more than 40 years of experience and a state-of-the-art 5,200 m² facility in Dijo in Burgundy, FILAB specializes in bulk density testing, specific gravity analysis, true density measurement, and powder characterization for APIs, excipients, formulations and finished pharmaceutical products and materials.
What is density analysis / density testing ?
Density analysis is a fundamental analytical technique that measures the mass per unit volume of a substance. In pharmaceutical and chemical manufacturing, density measurement provides critical insights into:
- Material purity and composition : verify raw material quality
- Powder flowability and compressibility : optimize tableting processes
- Tablet quality and consistency : ensure dose uniformity
- Batch-to-batch reproducibility : maintain manufacturing control
- Formulation performance : predict dissolution and bioavailability
FILAB’s comprehensive density testing services
Bulk density testing is essential for pharmaceutical powder characterization. FILAB measures:
- Bulk Density (ρbulk): Natural packing density without compaction
- Tapped Density (ρtapped): Compacted density after mechanical tapping
- Hausner Ratio: Flowability indicator for powder handling
- Carr’s Index: Compressibility measurement critical for tablet compression
Key Applications:
- Powder flow assessment for manufacturing processes
- Equipment design and scale-up specifications
- Technology transfer support
- Raw material quality control and release testing
Why Choose FILAB?
Our pharmaceutical expertise ensures accurate interpretation of bulk density results in the context of your specific formulation and process requirements.
FILAB’s gas pycnometry technology determines true density by measuring the solid volume excluding all pore spaces using helium or nitrogen displacement.
Applications:
- API characterization and polymorphism studies
- Porosity calculations for tablets and granules
- Material identification and purity verification
- Formulation development and optimization
- ICH Q2 method validation support
Envelope density testing measures the external volume a sample occupies, including both solid material and closed pores. This technique is critical for:
- Tablet consistency evaluation – Monitor compression uniformity
- Compaction extent assessment – Optimize tablet hardness
- Dissolution prediction – Correlate porosity to drug release
- Packaging and storage optimization – Calculate bulk volumes
Combined Analysis:
When envelope density is combined with true density measurements, FILAB can calculate porosity – a Critical Quality Attribute (CQA) directly affecting tablet disintegration, dissolution rate, and drug bioavailability.
Pharmaceutical Example:
For two tablets with identical API mass but different porosities, the more porous version will demonstrate faster dissolution and API release, potentially affecting clinical efficacy.
Specific gravity analysis determines the density ratio of a substance relative to water at specified temperatures. FILAB provides:
- Liquid density measurement (pharmaceutical syrups, solutions)
- Suspension and emulsion analysis
- Temperature-corrected results (15°C, 20°C, 25°C standards)
- Multi-temperature profiling for stability studies
Industries Served:
- Pharmaceutical liquids and oral solutions
- Chemical intermediates and solvents
- Cosmetic formulations
- Quality control for raw materials
- Regulatory submission documentation (CTD Module 3)
FILAB Expertise: Our analytical chemists understand the relationship between specific gravity, concentration, and pharmaceutical specifications.
For particulate materials, powders, and granules, apparent density testing accounts for interparticle void spaces, providing practical manufacturing data for:
- Process design – Size equipment for powder handling
- Blend uniformity assessment – Ensure homogeneous mixing
- Container filling operations – Optimize packaging efficiency
- Logistics planning – Calculate shipping volumes and costs
Our solutions: comprehensive density analysis techniques
FILAB laboratory offers a range of complementary techniques to determine the true, bulk or functional density of a wide variety of matrices: liquids, organic or metallic powders, polymers, resins, bulk parts, composite materials, etc.
Our density analysis techniques
- Tapped density (powders)
- Bulk density (Archimedes’ principle)
- True density (helium pycnometer)
- Density measurement using capillary densimeter
Application case – Density analysis in polymers
In the polymer industry, density measurement is used to verify formulation homogeneity or detect deviations related to material changes, filler content variations or process modifications.
A non-compliant density may indicate mixing issues, residual moisture or composition variations.
➡️ This analysis helps secure quality control and adjust processing parameters.
Application case – Density analysis in metallurgy
In the metallurgical sector, density analysis is used to evaluate the compaction of metal powders intended for sintering or to check the integrity of bulk parts.
A density that is too low may indicate excessive porosity likely to affect mechanical properties, while an abnormally high density may point to material contamination or a process defect.
➡️ The objective is to identify the root cause of the deviation and optimize the manufacturing process with the support of a specialized laboratory such as FILAB.
Applications of FILAB density testing in pharmaceutical development
Formulation development
Formulation development
- Excipient selection and compatibility studies
- Powder blend optimization for direct compression
- Granulation process monitoring and optimization
- Compression behavior prediction for tablet manufacturing
- Capsule filling optimization
Quality control & release testing
Quality control & release testing
- Raw material specification verification (API, excipients)
- In-process control during manufacturing
- Finished product quality assessment
- Specification setting for regulatory filings
- Stability studies support (ICH stability protocols)
Process optimization
Process optimization
- Scale-up feasibility analysis (pilot to commercial)
- Equipment design specifications
- Flow property characterization
- Segregation tendency evaluation
- Technology transfer support
Regulatory submissions
Regulatory submissions
- CMC (Chemistry, Manufacturing, and Controls) documentation
- ICH Q2 method validation studies
- Specification justification
- Comparability protocols
- Reference standard characterization
Troubleshooting & failure investigation
Troubleshooting & failure investigation
- Batch-to-batch variability investigation
- Manufacturing deviation analysis
- Product quality complaints
- Dissolution failure root cause analysis
Why choose FILAB for density analysis?
Over 45 years of experience serving pharmaceutical manufacturers, biotech companies, and chemical industry leaders across Europe and internationally.
- COFRAC ISO/IEC 17025 accredited (Accreditation No. 1-1793)
- GMP-compliant analytical procedures and facilities
- FDA, EMA, and ICH guideline adherence
- Full documentation packages including Certificates of Analysis (CoA)
- Support for regulatory submissions (CTD dossiers, DMFs)
- Standard testing: 3-5 business days
- Rush services available: 24-48 hours for urgent projects
- Real-time project tracking via dedicated customer portal
- Responsive technical support from project managers
Combine density analysis with FILAB’s complementary techniques:
- Particle size distribution (laser diffraction)
- Powder flow characterization
- Moisture content determination (Karl Fischer, TGA)
- Chemical composition analysis (HPLC-MS, GC-MS, ICP-MS)
- Polymorphism screening (XRD, DSC, FTIR)
- Surface area measurement (BET method)
- Thermal analysis (TGA, DSC, DMA)
99% of services performed in-house – ensuring rapid turnaround and seamless multi-technique workflows.
Laboratory density measurement
Using a laboratory for density measurement allows you to:
- verify material compliance with specifications or internal standards
- monitor formulation consistency or detect production drift
- assess material porosity or compaction
- understand powder behavior during transport, dosing or shaping steps
- compare different supply sources or qualify a new supplier
- optimize a process, formulation or processing parameters
FAQ
The method depends on the nature of the matrix (liquid, powder, bulk solid) and the required level of accuracy.
FILAB laboratory teams guide you toward the most appropriate technique based on particle size distribution, porosity and analytical objectives.
FILAB laboratory analyzes liquids, organic or metallic powders, polymers, composite materials, bulk metals, resins, ceramics and any other solid material requiring density measurement.
No. True density excludes porosity using a helium pycnometer, while bulk density reflects the overall density of the material, including porosity.
Both values are often complementary.
Simply complete the web form to be contacted by a dedicated representative.
A quotation is provided within 24 to 48 hours.
Bulk density includes all void spaces between particles (interparticle porosity), while true density measures only the solid material volume, excluding all accessible porosity. For pharmaceutical powders, bulk density is critical for manufacturing process design, while true density is used for material identification and porosity calculations.
Yes, FILAB offers complete ICH Q2(R1) method validation services including precision (repeatability and intermediate precision), accuracy, linearity, range, specificity, detection limits, quantitation limits, and robustness studies. Our validation protocols meet FDA, EMA, and ICH requirements.
Yes, FILAB is COFRAC ISO 17025 accredited (Accreditation No. 1-1793) and is the only laboratory in France accredited for elemental impurities analysis in pharmaceutical matrices. Our density analysis procedures follow GMP principles and are suitable for regulatory submissions.
Yes, FILAB serves 2,200+ clients across France and internationally. We provide multilingual support, understand international regulatory requirements (FDA, EMA, PMDA), and can accommodate international shipping and logistics.
Absolutely. FILAB’s 5,200 m² facility houses over 100 analytical techniques. We routinely combine density analysis with particle size distribution, powder flow testing, chemical analysis (HPLC-MS, GC-MS), thermal analysis (DSC, TGA), XRD for polymorphism, and more – all performed 99% in-house for seamless workflows.
To request a quote, you can contact our team via our online contact form, by phone, or by email.
Simply provide us with your requirements for density analysis (type of material, desired analysis - bulk density, true density, specific gravity, etc., applicable standards such as USP <616> or Ph. Eur. 2.9.34, urgency level, number of samples, GMP requirements…). We will then send you a customized technical and pricing proposal within 24-48 hours.
Turnaround times vary depending on the nature of the density testing and the complexity of the project.FILAB is committed to delivering fast turnaround times adapted to your industrial constraints and urgent needs, while maintaining the highest quality standards and regulatory compliance for pharmaceutical and chemical applications.
