ResidualInactivantChecker

Residual Inactivant

Vet veterinary veterinary vaccines animal health adjuvants aquaculture batch release CSV→JSON

Utility description: Residual Inactivant

Residual Inactivant Checker — Control of Residual Inactivants

ℹ️ Utility assesses the content of residual chemical agents used for virus or bacteria inactivation in vaccines according to Ph. Eur. and WHO requirements:
• Inactivant Types: Formaldehyde (Formalin), Beta-Propiolactone (BPL).
• Quantitative Determination: Usually in parts per million (ppm) or mg/L.
• Toxicological Limits: Strict limits to ensure patient safety.
• Method Validation: Control of extraction efficiency (Recovery).

⚠️ CRITICAL:
• Exceeding the upper limit of formaldehyde can lead to toxic and allergic reactions.
• For BPL, it is important to control not only the residue of the substance itself but also its hydrolysis products, although they are less toxic.
• Invalid method (low Recovery) does not allow guaranteeing batch safety.

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

Input format:
BatchNumber,ProductName,InactivantType,MeasuredResidual_ppm,MaxLimit_ppm,MinLimit_ppm,MethodType,RecoveryPercent

Example:
INACT-001,IPV,Formaldehyde,15.0,50.0,0.0,Colorimetric,95.0

— WHY IS THIS NEEDED?
The inactivation process requires the use of high concentrations of chemical agents.
Before vaccine release, it is necessary to prove that these agents have been removed or diluted to a safe level.
This is a Critical Quality Attribute (CQA) for all inactivated vaccines (IPV, Influenza, Rabies, Hepatitis A).

⚠️ CRITICAL:
• Assay Methods:
- Formalin: Often colorimetric method (with acetylacetone) or HPLC is used.
- BPL: Usually determined by GC or HPLC, as it is unstable and rapidly hydrolyzes.
• Sample Stability: Formalin samples must be analyzed quickly or stabilized, as it can bind to medium components.
• Specificity: Method should not give false-positive results with culture medium components.

Key features:
• Verification of residual amounts against safe limits
• Analytical procedure validity control (Recovery)
• Support for different inactivant types
• Generation of reports for QC departments and LIMS LabWare
• Compliance with GMP and Pharmacopoeia requirements

Critical parameters:
• Formalin Residue: Usually < 50-100 ppm (depends on product)
• BPL Residue: Usually < 10-20 ppm (or absence)
• Recovery: 80–120%

💡 Usage tips:
1. Calibration: Use fresh inactivant standard solutions, as they may polymerize or degrade.
2. Sample Preparation: Protein precipitation or dialysis may be required to remove proteins and other interfering substances.
3. Limit of Detection: Method must be sensitive enough to detect levels significantly below the established limit.
4. Trends: Track purification step efficiency (dialysis, ultrafiltration) by residue reduction.
5. Documentation: Results are mandatory for registration dossier and batch release.

⚠️ Note: In some cases, a small amount of formaldehyde may remain intentionally to prevent reversion or contamination during storage (multi-dose vials), but this level is strictly regulated.

input.csv

BatchNumber,ProductName,InactivantType,MeasuredResidual_ppm,MaxLimit_ppm,MinLimit_ppm,MethodType,RecoveryPercent
INACT-2026-IPV-001,Inactivated Polio Vaccine,Formaldehyde,15.0,50.0,0.0,Colorimetric,95.0
INACT-2026-RAB-002,Rabies Vaccine,Beta-Propiolactone,5.0,10.0,0.0,HPLC,98.0
INACT-2026-FAIL-003,DTPa Vaccine,Formaldehyde,65.0,50.0,0.0,Colorimetric,92.0

URS & FS — User Requirements and Functional Specification

This document describes the controlled interface and behaviour of ResidualInactivantChecker for Residual Inactivant Checker.

Domain limits URS input.csv FS IQ/OQ/PQ

Domain limits and critical parameters

Key fragments from the source description are shown below. Before production use, limits must be verified against the approved specification, registration dossier and local SOPs.

ℹ️ Utility assesses the content of residual chemical agents used for virus or bacteria inactivation in vaccines according to Ph. Eur. and WHO requirements:
• Toxicological Limits: Strict limits to ensure patient safety.
⚠️ CRITICAL:
• Exceeding the upper limit of formaldehyde can lead to toxic and allergic reactions.
BatchNumber,ProductName,InactivantType,MeasuredResidual_ppm,MaxLimit_ppm,MinLimit_ppm,MethodType,RecoveryPercent
This is a Critical Quality Attribute (CQA) for all inactivated vaccines (IPV, Influenza, Rabies, Hepatitis A).
• Sample Stability: Formalin samples must be analyzed quickly or stabilized, as it can bind to medium components.
• Verification of residual amounts against safe limits
• Compliance with GMP and Pharmacopoeia requirements
Critical parameters:
• Formalin Residue: Usually < 50-100 ppm (depends on product)
• BPL Residue: Usually < 10-20 ppm (or absence)
3. Limit of Detection: Method must be sensitive enough to detect levels significantly below the established limit.

URS — User Requirements Specification

ID	Requirement	Criticality	Acceptance criterion
URS-001	The utility shall accept an input.csv file for Residual Inactivant Checker with headers defined in the data contract.	High	The file is processed without manual header editing.
URS-002	The utility shall perform deterministic QC evaluation without machine learning and without probabilistic conformance decisions.	High	Identical input data, rule version and configuration produce reproducible results.
URS-003	The utility shall validate mandatory fields, data types, ranges, units and domain plausibility.	High	Schema, conversion and range errors are explicitly reported.
URS-004	The utility shall apply domain limits and rules from the description, approved specification, registration dossier and local SOPs.	High	Each check has PASS/WARNING/FAIL and a clear message.
URS-005	The utility shall generate output.json with machine-readable results, source values, warnings, failures and critical findings.	High	JSON is suitable for LIMS/ELN/MES integration and QA/QC review.
URS-006	The utility shall preserve traceability between batch/sample, input file, applied rules and final status.	High	Output contains identifiers, checked parameters and audit metadata.
URS-007	The documentation shall support IQ/OQ/PQ, CSV/CSA and review by internal QA or inspectors.	Medium	URS, FS, input/output contract and test scenarios are supplied with the utility.
URS-008	The utility shall be used as a QC decision-support tool and not as a substitute for approved specifications and QA/QP release decision.	Medium	Documentation states change control and limit-verification expectations.

input.csv contract

#	Field	Type	Sample	Purpose
1	`BatchNumber`	string / controlled vocabulary	`INACT-2026-IPV-001`	Batch or lot identifier used for traceability.
2	`ProductName`	string / controlled vocabulary	`Inactivated Polio Vaccine`	Product or dosage-form name under evaluation.
3	`InactivantType`	string / controlled vocabulary	`Formaldehyde`	Controlled input parameter for deterministic QC rules.
4	`MeasuredResidual_ppm`	decimal	`15.0`	Impurity/residual component used for specification conformance assessment.
5	`MaxLimit_ppm`	decimal	`50.0`	Approved limit applied during result evaluation.
6	`MinLimit_ppm`	decimal	`0.0`	Approved limit applied during result evaluation.
7	`MethodType`	string / controlled vocabulary	`Colorimetric`	Method or process approach; controlled reference value.
8	`RecoveryPercent`	decimal	`95.0`	Recovery; indicator of analytical validity.

BatchNumber,ProductName,InactivantType,MeasuredResidual_ppm,MaxLimit_ppm,MinLimit_ppm,MethodType,RecoveryPercent
INACT-2026-IPV-001,Inactivated Polio Vaccine,Formaldehyde,15.0,50.0,0.0,Colorimetric,95.0
INACT-2026-RAB-002,Rabies Vaccine,Beta-Propiolactone,5.0,10.0,0.0,HPLC,98.0
INACT-2026-FAIL-003,DTPa Vaccine,Formaldehyde,65.0,50.0,0.0,Colorimetric,92.0

Input validation rules

ID	Field	Rule	Criticality
VR-001	`BatchNumber`	The field shall match an approved dictionary or accepted string representation.	High
VR-002	`ProductName`	The field shall match an approved dictionary or accepted string representation.	High
VR-003	`InactivantType`	The field shall match an approved dictionary or accepted string representation.	High
VR-004	`MeasuredResidual_ppm`	The field shall match an approved dictionary or accepted string representation.	Medium
VR-005	`MaxLimit_ppm`	The field shall match an approved dictionary or accepted string representation.	Medium
VR-006	`MinLimit_ppm`	The field shall match an approved dictionary or accepted string representation.	Medium
VR-007	`MethodType`	The field shall match an approved dictionary or accepted string representation.	Medium
VR-008	`RecoveryPercent`	The field shall match an approved dictionary or accepted string representation.	Medium

FS — Functional Specification

ID	Function	Implementation
FS-001	CLI execution	Support execution modes: demo mode without arguments and production mode input.csv output.json.
FS-002	CSV import	Read input.csv in UTF-8/CSV-compatible format and validate header and expected columns.
FS-003	Schema validation	Check mandatory fields, column count, unknown key fields and empty mandatory values.
FS-004	Type conversion	Convert numeric, flag and text values; invalid format is recorded as a row-level error.
FS-005	Domain rule engine	Apply rules for Residual Inactivant Checker, including critical limits from the description and approved specification.
FS-006	Status aggregation	Produce final status: FAIL for critical failure, WARNING for non-critical deviation, PASS for conformance.
FS-007	JSON export	Write output.json with detailed checks, source values, warnings, failures and critical findings.
FS-008	Audit support	Keep result structure suitable for review, deviation investigation and calculation reproduction.
FS-009	Integration contract	Support the scenario LIMS/ELN/MES → input.csv → utility → output.json → portal/admin review.
FS-010	Error handling	Return explicit messages for missing file, empty CSV, invalid schema, output write failure and invalid format.

Example output.json

{
  "utilityId": "residualinactivantchecker",
  "utilityFolder": "ResidualInactivantChecker",
  "package": "Vet",
  "overallStatus": "PASS|WARNING|FAIL",
  "sourceFile": "input.csv",
  "processedAtUtc": "2026-06-10T00:00:00Z",
  "checks": [
    {
      "parameter": "BatchNumber",
      "value": "INACT-2026-IPV-001",
      "status": "PASS|WARNING|FAIL",
      "message": "Deterministic rule-based check result",
      "ruleReference": "FS-RULE-001"
    },
    {
      "parameter": "ProductName",
      "value": "Inactivated Polio Vaccine",
      "status": "PASS|WARNING|FAIL",
      "message": "Deterministic rule-based check result",
      "ruleReference": "FS-RULE-002"
    },
    {
      "parameter": "InactivantType",
      "value": "Formaldehyde",
      "status": "PASS|WARNING|FAIL",
      "message": "Deterministic rule-based check result",
      "ruleReference": "FS-RULE-003"
    },
    {
      "parameter": "MeasuredResidual_ppm",
      "value": "15.0",
      "status": "PASS|WARNING|FAIL",
      "message": "Deterministic rule-based check result",
      "ruleReference": "FS-RULE-004"
    },
    {
      "parameter": "MaxLimit_ppm",
      "value": "50.0",
      "status": "PASS|WARNING|FAIL",
      "message": "Deterministic rule-based check result",
      "ruleReference": "FS-RULE-005"
    },
    {
      "parameter": "MinLimit_ppm",
      "value": "0.0",
      "status": "PASS|WARNING|FAIL",
      "message": "Deterministic rule-based check result",
      "ruleReference": "FS-RULE-006"
    },
    {
      "parameter": "MethodType",
      "value": "Colorimetric",
      "status": "PASS|WARNING|FAIL",
      "message": "Deterministic rule-based check result",
      "ruleReference": "FS-RULE-007"
    },
    {
      "parameter": "RecoveryPercent",
      "value": "95.0",
      "status": "PASS|WARNING|FAIL",
      "message": "Deterministic rule-based check result",
      "ruleReference": "FS-RULE-008"
    }
  ],
  "criticalFindings": [],
  "warnings": [],
  "audit": {
    "inputHash": "sha256:<calculated at runtime>",
    "rulesVersion": "<utility executable version>",
    "documentation": "ResidualInactivantChecker.documentation.html"
  }
}

Traceability matrix

URS	FS	Test	Evidence
URS-001	FS-001, FS-002	OQ-001	Verify execution and import of valid input.csv.
URS-002	FS-005, FS-006	OQ-004	Repeat the same dataset and compare output.json.
URS-003	FS-003, FS-004, FS-010	OQ-002, OQ-003	Verify missing columns and invalid types.
URS-004	FS-005, FS-006	OQ-004, PQ-001	Verify critical deviations on real/boundary data.
URS-005	FS-007, FS-009	OQ-005	Verify JSON schema and downstream-system suitability.
URS-006	FS-008	OQ-006	Verify identifiers and audit metadata.
URS-007	FS-008, FS-010	IQ-001, OQ-007	Verify documentation completeness and control evidence.
URS-008	FS-005, FS-008	PQ-002	Verify review workflow and no replacement of QA decision.

IQ/OQ/PQ test scenarios

ID	Scenario	Expected result
IQ-001	Verify executable, input.csv, documentation and checksum availability.	Delivery set is complete; version is recorded.
OQ-001	Valid sample row from input.csv.	PASS or acceptable WARNING according to rules.
OQ-002	Remove a mandatory CSV column.	Schema error or FAIL with missing-column reference.
OQ-003	Place a non-numeric value into a numeric field.	Type-conversion error with row/field reference.
OQ-004	Set a critical parameter outside the limit.	FAIL and critical finding.
OQ-005	Verify output.json structure.	All mandatory sections are present and JSON is valid.
OQ-006	Verify batch/sample traceability.	Input and result identifiers match.
PQ-001	Verify 3–5 real user batches/samples.	Result is confirmed by QC/QA review.
PQ-002	Verify deviation workflow and manual QA decision.	Utility supports review but does not replace approved decision.

QA/QC and change control

Do not rename columns without updating validator, documentation and test set.
Retain input.csv, output.json, executable version and checksum.
Before production use, perform IQ/OQ/PQ or equivalent CSV/CSA verification.
Critical limits shall be verified against the approved specification, registration dossier and local SOPs.
The utility provides structured QC decision support; final release decision remains with QA/QP and approved procedures.

Included in packages

Toxicology QC Suite

QC utility package for toxicologically relevant risks: genotoxic impurities, residual solvents, elemental impurities, heavy metals, mercury, mycotoxins, pesticides, extractables/leachables and degradation impurities.

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Vet — Veterinary QC Utilities

Vet is designed for veterinary pharmaceuticals and vaccines: adjuvants, antigens, autogenous vaccines, aquaculture, feed/premixes, antimicrobial and antiparasitic products, sterility and batch release.

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