How to Investigate an OOT Result in Stability Testing
Learn the decision flow for an OOT investigation in stability studies, from the first flag to a documented conclusion and CAPA decision.
How to Identify OOT in Stability Studies: Statistical Methods
Learn how to find OOT in stability studies with regression, tolerance interval and slope methods, and follow a worked assay example.
OOT vs OOS in Pharma: Differences and Investigation
OOS breaks a limit and blocks release. OOT breaks a pattern and needs assessment. Learn the differences, investigation steps and release decisions.
Out of trend (OOT) results in Pharmaceutical Quality control
OOT results pass specification but break the usual pattern. Learn how to detect them, how they differ from OOS, and how to investigate them.
Multimill Troubleshooting: Common Problems & Fixes
Most of the causes of multimill malfunctions such as oversized granules, excessive fines, screening problems, or motor overloads are related to blade dullness, incorrectly sized screens, or improper feed rates. In this article, you will find 8 failure modes with their potential causes and solutions for your pharmaceutical granulation process.
Colloidal Mill: Common Problems, Causes, and Troubleshooting Tips
Even a well-maintained colloidal mill experiences recurring issues that lead to malfunction eventually, and usually, there are only several common causes for that: the gap drift, rotor/stator wear, improper feed rate, or a faulty mechanical seal. Moreover, preventing the issues from arising is significantly simpler and less resource-consuming than addressing them after they occur. For … Read more
Common Problems and Troubleshooting for Disintegration Test Apparatus
Have you ever asked yourself why a tablet, which has passed all the other quality control tests, fails the QC bench? A disintegration test apparatus is used to determine whether a tablet or a capsule disintegrates within a specified time under defined conditions. The test is performed by vertically reciprocating the unit in a liquid maintained at human body temperature. This article describes the working principle of the disintegration test apparatus, its components, the procedure for the disintegration test, calibration, and the disintegration limits set by the manufacturers for different dosage forms. This information will help QC and manufacturing personnel to perform the disintegration test properly and release the batches of the pharmaceutical products.
Common Audit Observations and FDA 483 Findings for Water Systems
Learn what FDA investigators actually flag most often when auditing pharmaceutical water systems — sampling gaps, sanitization failures, monitoring lapses, validation shortfalls, CAPA deficiencies, and broader GMP compliance issues.
0.1M Perchloric Acid Preparation and Standardization Procedure (IP Method)
Know the step-by-step procedure used to prepare and standardize 0.1M perchloric acid solution as per IP guidelines. Incorporates reagents, equipment, calculation, detection of endpoint, storage of reagents, and standardization with potassium hydrogen phthalate (KHP).
0.004 M Benzethonium Chloride Solution Preparation and Standardization Procedure
Preparation and standardization of 0.004 M benzethonium chloride solution with potentiometric titration with 0.1 M perchloric acid. It deals with preparation of reagents, calculation of standardizations, equivalence factor and recommendation on storage for pharmaceutical laboratory applications.
How to Prepare and Standardize 0.05 M Silver Nitrate (SOP)
Here is the exact process for making and standardizing 0.05 M silver nitrate. Includes the chemicals, the titration procedure and the formula to calculate and storage condition
Preparation and Standardization of 0.025 M Sulphuric Acid Solution
Know how to prepare 0.025 M sulphuric acid solution using anhydrous sodium carbonate, methyl red indicator, calculations and titration procedure.
How Perform Limit Test for Heavy Metals (SOP)
Limit tests for heavy metals need not be confusing. This guide includes detailed protocols with equipment, reagent preparation and step-by-step instructions to perform a typical test procedure. For all of the Test A, B, C and D options, there are clear instructions to ensure your pharmaceutical quality control is accurate and on track. 1.0 Scope: … Read more
How to Perform Solubility Test
The solubility test is a basic test performed in the pharmaceutical laboratory to assess the solubility of a substance in a given solvent. This guide describes the entire solubility testing procedure, apparatus used, considerations for selection of solvents, temperature, and standard solubility classification from very soluble to practically insoluble. This step-by-step reference will help you to test accurately and fulfil the pharmaceutical quality requirements.
Capreomycin Sulphate Colour of Solution Test – Complete SOP
The Capreomycin Sulphate Colour of Solution Test is an important quality control test to check the appearance of a prepared capreomycin solution. This test is performed to ensure the solution meets the pharmacopoeial colour standards, which indicates that the product is of good quality and consistent.
Preparation and Standardization of 0.1M Ethanolic Sodium Hydroxide Solution SOP
This article describes the SOP for preparation and standardization of 0.1M ethanolic sodium hydroxide solution. It includes apparatus, reagents, preparation of the thymolphthalein indicator, preparation of sodium hydroxide solution, standardization procedure of benzoic acid, formula to calculate the molarity, storage conditions and reference as per IP norms. It is a guide for pharmaceutical quality control and analytical laboratories.