OsmolalityQualityChecker

Osmolality Quality Checker — Control of Solution Osmolality

ℹ️  Utility checks compliance of osmolality with specified limits (USP <785> / Ph. Eur. 2.2.35):
   • Measured value must be within [Lower Limit – Upper Limit].
   • Typical ranges: 280–310 mOsm/kg (isotonic solutions).

⚠️  CRITICAL: Hypo- or hyper-osmolar solutions can be dangerous to the patient!
   Injections with incorrect osmolality cause hemolysis, pain, or phlebitis.

Usage:
 OsmolalityQualityChecker.exe                            → demo mode (console output)
 OsmolalityQualityChecker.exe input.csv output.json      → evaluate your data

Input format:
BatchNumber,MeasuredOsmolality,LowerLimit,UpperLimit

Example:
 OSMO-INJ-2026-001,295.0,280.0,310.0

— WHY IS THIS NEEDED?
Osmolality is a critical quality attribute for parenteral, ophthalmic, and nasal products.
• Determines solution tonicity relative to blood plasma.
• Measured by freezing point depression (cryoscopy) or vapor pressure methods.
• USP <785> and Ph. Eur. 2.2.35 regulate measurement methods.
• Control is necessary to ensure patient safety and comfort during drug administration.

⚠️  CRITICAL:
• For injectables, osmolality should be close to physiological (~290 mOsm/kg).
• High osmolality (>1000 mOsm/kg) requires administration only into large veins.
• Osmometer calibration must be performed daily using standard solutions (NaCl).
• Sample must be free of air bubbles.

Key features:
• Rapid specification compliance check.
• Support for cryoscopic osmometer data.
• Generation of PASS/FAIL status for LIMS.

Critical parameters:
• Measured Osmolality: Within [LL - UL]

💡 Usage tips:
1. Thoroughly mix sample before measurement.
2. Use clean tubes to exclude contamination.
3. Check freezing point of pure solvent (water) before series.
4. Account for influence of volatile components (alcohols) on result.
5. For viscous samples, ensure complete thermostating.

⚠️ Note: Osmolality (mOsm/kg) depends on the number of dissolved solute particles and not their nature, unlike osmolarity (mOsm/L), which depends on volume and temperature.