Analysis Instruments

A Photo Stability Chamber is a specialized laboratory equipment used to test how light exposure affects the stability of products such as pharmaceuticals, cosmetics, and chemicals. It is mainly used in industries that must follow regulatory guidelines like ICH Q1B (Photostability Testing of New Drug Substances and Products).

What a Photo Stability Chamber Does

It exposes samples to controlled light and environmental conditions to determine whether the product degrades when exposed to light.

Typical parameters controlled:

• Light intensity (UV and visible light)

• Temperature

• Humidity (in some models)

• Exposure duration

The chamber simulates sunlight or artificial light conditions to check if the product changes in:

• Color

• Potency

• Chemical composition

• Physical appearance

Types of Light Used

1. UV Light (320–400 nm)

2. Visible Light (400–800 nm)

According to ICH guidelines, samples are usually exposed to:

• 1.2 million lux hours of visible light

• 200 watt hours/m² of UV light

Main Components

• UV lamps

• Visible light lamps

• Light intensity sensors

• Temperature control system

• Sample trays

• Controller/display panel

Industries That Use It

• Pharmaceutical companies

• Cosmetics manufacturers

• Food industry

• Chemical laboratories

• R&D labs

Example Applications

• Testing drug tablets, capsules, injections

• Stability of creams and lotions

• Packaging material testing

• Photodegradation studies