ICH Q1B Photostability Testing for Pharmaceutical Products
ICH photostability testing is used in the pharmaceutical, cosmetic, and food industries to evaluate the stability and effectiveness of products when exposed to light. It is important to ensure that products can withstand light exposure and maintain their potency and efficacy over time. Testing is done on a single batch of material and may need to be repeated if modifications are made to the product. The testing methodology includes tests on the drug substance, product, and packaging. Specific exposure criteria must be met for pharmaceuticals, and the testing is also used in the cosmetic and food industries for evaluating additives and colourants.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ICH Photostability Testing evaluates the effect of light exposure on pharmaceutical products to ensure their stability, safety, and efficacy throughout shelf life. It is conducted as per ICH Q1B guidelines, which define standardized conditions for light exposure.
This testing is essential for determining whether a drug substance or product undergoes degradation when exposed to UV and visible light, helping manufacturers design proper packaging, labeling, and storage conditions to maintain product quality.
Scope, Applications, and Benefits
Scope
Photostability testing involves exposing samples to controlled light sources simulating daylight and UV radiation to assess potential degradation. It supports stability studies, regulatory compliance, and product development.
The scope includes:
Testing of drug substances and finished products
Exposure to UV and visible light sources
Evaluation of photodegradation behavior
Assessment of packaging effectiveness
Compliance with ICH Q1B guidelines
Applications
- Stability testing of formulations
Packaging material evaluation
Regulatory submission studies
Quality control laboratories
Benefits
Ensures product safety and efficacy
Identifies light-sensitive compounds
Supports proper packaging selection
Meets regulatory requirements
Extends product shelf life
Test Process
Sample Preparation
Drug substances or products are placed in suitable containers and prepared according to testing requirements.
1Light Exposure
Samples are exposed to controlled UV and visible light sources under defined intensity and duration conditions.
2Monitoring Changes
Physical and chemical changes such as color, potency, or degradation are monitored during exposure.
3Analysis and Evaluation
Results are analyzed to determine photostability and compliance with ICH guidelines.
4Technical Specifications
| Parameter | Details |
|---|---|
| Light Sources | UV (near 320–400 nm) and visible light |
| Exposure Conditions | Defined lux hours and UV energy levels |
| Sample Types | Drug substances and finished products |
| Parameters Measured | Degradation, color change, potency loss |
| Environment | Controlled temperature and humidity |
| Output | Stability data and degradation profile |
Instrumentation Used for Testing
Photostability Chamber
UV and Visible Light Sources
Lux Meter
UV Radiometer
Analytical Instruments (HPLC, UV-Vis Spectrophotometer)
Results and Deliverables
Photostability study report
Degradation and stability data
Compliance with ICH Q1B
Packaging suitability assessment
Recommendations for storage conditions
Why Choose Infinita Lab for ICH Photostability testing?
Infinita Lab is a leading provider of <Service-Name> and streamlined material testing services, addressing the critical challenges faced by emerging businesses and established enterprises. With access to a vast network of over 2,000+ accredited partner labs across the United States, Infinita Lab ensures rapid, accurate, and cost-effective testing solutions. The company’s unique value proposition includes comprehensive project management, confidentiality assurance, and seamless communication through a Single Point of Contact (SPOC) model. By eliminating inefficiencies in traditional material testing workflows, Infinita Lab accelerates research and development (R&D) processes.
Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote
Frequently Asked Questions
ICH photostability testing evaluates how pharmaceutical products respond to exposure from UV and visible light, helping determine whether they degrade and ensuring product stability, safety, and efficacy throughout their intended shelf life.
It identifies light-sensitive products, ensures drug safety and effectiveness, and helps manufacturers select appropriate packaging and labeling to protect products from light-induced degradation during storage and distribution.
Parameters include chemical degradation, potency loss, color changes, and physical appearance to determine whether the product remains stable under specified light exposure conditions.
Yes, packaging materials can protect products from light exposure, so testing is often performed with and without packaging to evaluate its effectiveness.
Both drug substances and finished pharmaceutical products, including tablets, capsules, and injectables, are tested to evaluate their stability under light exposure and determine potential degradation risks.
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