Impurity Related Service
Impurities can originate from starting materials, synthetic processes, degradation pathways, storage conditions, or manufacturing operations and may directly affect the quality, safety, and stability of pharmaceutical products. Protheragen provides integrated impurity services to support the identification, isolation, characterization, analytical evaluation, and control of impurities throughout drug development. By combining impurity research with analytical development, process understanding, and stability studies, we help establish scientifically sound impurity control strategies for development and regulatory requirements.
Overview of Impurity Related Service
Impurity related service is an important component of pharmaceutical CMC development, providing scientific assessment of impurities that may arise from raw materials, manufacturing processes, storage, or product degradation. The service focuses on understanding the origin, behavior, and significance of impurities in drug substances and drug products, providing data that supports pharmaceutical quality assessment and development decisions. It can be applied across different development stages and tailored to the characteristics of the molecule, manufacturing process, dosage form, and intended development objectives.
Fig.1 The types of impurities in pharmaceutical products. (Hasanah, A.N, et al., 2025)
Our Services
The impurity-related services cover a broad range of development and quality research needs, from early-stage impurity assessment to method development, impurity standard preparation, and degradation pathway investigation.
Stability-Indicating Impurity Method Development & Validation
We develop and validate analytical methods for the detection and quantification of related substances and degradation products generated during stability studies.
Our services include:
- Stability-indicating method development
- Related substance and degradation product analysis
- Method optimization for specificity and sensitivity
- Forced degradation sample analysis
- Method validation and performance evaluation
- Quantitative assessment of specified and unspecified impurities
- Support for stability study sample testing
These methods help distinguish drug substance or drug product from process-related impurities and degradation products and provide analytical support for stability assessment.
Impurity Isolation & Structural Characterization
When impurities are detected during process development or stability studies, we support their isolation and structural characterization to facilitate impurity identification and risk assessment.
Services include:
- Impurity isolation and enrichment
- Separation and purification of individual impurities
- Structural characterization
- Identification of unknown impurities
- Investigation of impurity formation
- Characterization of process-related and degradation impurities
- Support for impurity structure confirmation
The resulting information can be used to support impurity profiling, analytical method development, process optimization, and quality assessment.
Impurity Standards, Labeled Compounds & Metabolite Synthesis
We provide synthesis and preparation of materials required for impurity identification, analytical method development, and quality studies.
Services include:
- Impurity reference standard synthesis
- Impurity marker preparation
- Labeled compound synthesis
- Metabolite synthesis and preparation
- Purification and characterization of synthesized materials
- Preparation of materials for analytical method development and qualification
These materials can support the identification and quantification of impurities and metabolites during pharmaceutical development.
Impurity Standard Characterization & Qualification
We provide characterization and qualification support for impurity reference materials used in pharmaceutical analysis.
Activities include:
- Purity assessment
- Identity confirmation
- Structural characterization
- Analytical characterization
- Reference material qualification
- Preparation of supporting characterization data
- Support for impurity standardization and testing
This service helps establish suitable reference materials for impurity analysis and routine quality testing.
Impurity Prediction & Process-Based Assessment
Impurity risks can be evaluated by combining synthetic route information, process chemistry knowledge, and computational prediction tools.
Services include:
- Impurity prediction based on synthetic routes
- Assessment of potential process-related impurities
- Computational impurity prediction
- Evaluation of likely impurity formation pathways
- Identification of potential degradation products
- Risk-based impurity assessment
- Support for impurity control strategy development
Early impurity assessment can help identify potential quality risks and guide process optimization and analytical development.
Genotoxic Impurity Method Development & Testing
We provide analytical support for potentially genotoxic impurities (GTIs), including method development, validation, and sample testing.
Services include:
- Genotoxic impurity risk assessment support
- Target impurity identification
- Analytical method development
- Method optimization and validation
- Trace-level impurity detection
- Sample testing and quantitative analysis
- Support for impurity control and monitoring
LC-MS and GC-MS based analytical approaches may be applied according to the physicochemical properties and analytical requirements of the target impurities.
Elemental Impurity & Residual Solvent Analysis
We support the development and validation of analytical methods for inorganic and volatile impurities associated with pharmaceutical manufacturing.
Services include:
Elemental Impurities:
- Elemental impurity method development
- Method validation
- Sample testing
- Quantitative elemental analysis
- Support for elemental impurity assessment
Residual Solvents:
- Residual solvent method development
- Method optimization and validation
- Sample testing
- Quantitative analysis of residual solvents
- Support for process and quality assessment
Analytical strategies can be selected according to the target analytes, sample matrix, and required sensitivity.
Degradation Pathway & Degradant Research
We investigate the formation and transformation pathways of degradation products to support stability assessment and impurity control.
Services include:
- Forced degradation studies
- Identification of degradation products
- Degradation pathway investigation
- Structural characterization of degradants
- Evaluation of degradation mechanisms
- Development of degradation product profiles
- Support for stability-indicating method development
- Recommendations for degradation product control
The resulting degradation knowledge can be integrated into formulation, packaging, stability, and analytical development strategies.
Impurity Research Across the CMC Lifecycle
Impurity research is closely connected with multiple CMC activities throughout drug development.
| Development Stage |
Key Impurity Activities |
| Early Development |
Impurity prediction, synthetic route assessment, preliminary impurity profiling |
| Process Development |
Process-related impurity identification, impurity isolation, process optimization |
| Analytical Development |
Related substance methods, impurity standards, method development and validation |
| Stability Studies |
Degradation product identification, stability-indicating methods, degradation pathway research |
| Clinical Development |
Impurity monitoring, specification support, reference standard qualification |
| Commercial Development |
Impurity control strategy, routine testing support, process-related impurity assessment |
Supporting Different Types of Impurities
Our impurity research services can support the investigation and control of different impurity categories, including:
- Process-Related Impurities
- Degradation Products
- Genotoxic Impurities
- Residual Solvents
- Elemental Impurities
- Starting Material- and Intermediate-Related Impurities
- Unknown or Unspecified Impurities
The specific analytical and characterization strategy is selected according to the drug substance, manufacturing process, development stage, and impurity risk profile.
Integrated Impurity Research Workflow
The integrated impurity research workflow combines impurity profiling, structural identification, analytical characterization, and risk-based control into a coordinated process. By connecting impurity research with process development, analytical development, and stability studies, the workflow supports systematic impurity assessment from early development through CMC and product lifecycle management.
From initial impurity profiling to control strategy development, our integrated workflow helps transform impurity data into actionable CMC insights, supporting robust process development and scientifically justified impurity control.
Why Choose Protheragen
- Integrated Impurity Assessment
From impurity prediction and detection to structural characterization and control strategy development, our services cover the key stages of impurity research.
- Analytical & Structural Expertise
Multiple analytical approaches can be selected based on impurity characteristics, concentration, sample matrix, and study objectives.
- Support for Complex Impurity Profiles
We can support investigations involving process-related impurities, degradation products, genotoxic impurities, residual solvents, elemental impurities, and unknown impurities.
Impurity findings are evaluated in the context of process development, analytical control, stability, and overall product quality rather than as isolated analytical results.
Services can be provided as individual impurity investigations or integrated into broader API, analytical, stability, and CMC development programs.
- From Impurity Identification to Control
A well-defined impurity profile provides an important foundation for pharmaceutical development and quality control. Our Impurity Related Services help transform impurity data into actionable knowledge—from identification and structural characterization to analytical control and CMC strategy.
Integrated impurity research services cover impurity identification, characterization, analytical testing, and control throughout the CMC development lifecycle. By integrating impurity research with analytical development, process development, and stability studies, Protheragen helps establish scientifically sound impurity control strategies, mitigate quality risks, and support efficient drug development. Contact us to discuss your impurity research requirements and develop an appropriate impurity assessment and control strategy for your program.
Reference
- Hasanah, A.N, et al. "Molecularly Imprinted Polymers for Pharmaceutical Impurities: Design and Synthesis Methods" Polymers. 2023; 15(6): 3401.
