Detergents and Foaming Agents in Toothpaste: SLS and Alternatives
How surfactants such as SLS give toothpaste its foam and spreading action, how alternatives compare, and how mixing, foam tests and cleaning are controlled.
Abrasives and Polishing Agents in Dentifrices: Types and Selection
How calcium carbonate, dicalcium phosphate, silica, alumina and hydroxyapatite work as dentifrice abrasives, and how RDA testing guides selection.
Quality Control Tests for Pharmaceutical Aerosols: Methods and Apparatus
Method-level guide to aerosol QC: flammability, vapor pressure, density, moisture, propellant identity, foam, leak and valve delivery tests with apparatus.
Aerosol Particle Size Measurement: Cascade Impactor and Light Scattering Decay
How a cascade impactor and light scattering decay measure inhaler aerosol size, and how MMAD, GSD and FPF are read from the results.
Cold Filling vs Pressure Filling of Pharmaceutical Aerosols
How cold filling and pressure filling of pharmaceutical aerosols are run, which products suit each and why cold filling fails for aqueous products.
Suspension Aerosols: Particle Size, Oleic Acid and Valve Clogging
How suspension aerosols are formulated and filled: particle size for the lung, the role of oleic acid, and the causes of valve clogging and dose variation.
Aerosol Valve, Actuator and Dip Tube: Components and Their Functions
A part-by-part guide to the aerosol valve: ferrule, valve body, vapor tap, metering valve, dip tube and actuator, with functions and troubleshooting.
Two-Phase vs Three-Phase Aerosol Systems: Formulation Guide
How two-phase and three-phase aerosol systems differ, with the role of solvent and propellant in water-based, foam and inhalation products.
Aerosol Propellants in Pharmaceuticals: CFC Replacement, Hydrocarbons, DME and HFA
How liquefied and compressed gas propellants work, why CFCs were replaced, and how hydrocarbons, DME and HFAs compare on flammability and medicinal use.
Media Fill Interview Questions and Answers: A Complete Guide for QA, QC and Production
Media fill interview questions and answers for QA, QC and production, from beginner to scenario level, with Annex 1, PIC/S and FDA positions separated.
Media Fill Failure Investigation: Root Cause Analysis and CAPA in Pharmaceuticals
How to investigate a failed media fill: contain the line, find the most probable root cause, review earlier batches, choose CAPA and plan the repeat APS.
Media Fill Frequency and Requalification: GMP Requirements for APS
Annex 1, PIC/S and FDA set different media fill cycles for lines, shifts and operators. Learn what triggers a repeat run and what to do after a failure.
Media Fill Acceptance Criteria: Limits, Contamination Results and GMP Requirements
What counts as a pass in an aseptic process simulation: Annex 1 zero growth, FDA 2004 bands, unit handling, QA review and failure investigation.
Media Fill for Powders and Lyophilized Products: APS in Isolators and RABS
How to design an aseptic process simulation for sterile powders, freeze-dried products, isolators and RABS under EU GMP Annex 1 and FDA guidance.
Media Fill Incubation Conditions and Inspection: Pharmaceutical APS Guide
What Annex 1, PIC/S PI 007 and FDA say about incubating and inspecting media fill units, and how to handle positives, records and QA review.
Media Fill Procedure and Protocol: Step-by-Step Guide for Pharmaceutical Industry
How a media fill is planned, run, incubated, evaluated and approved, with the Annex 1 and FDA rules for acceptance, failure and requalification.