Quality Assurance Philosophy
Every batch of IMLI Citric Acid undergoes comprehensive laboratory testing to ensure it meets the highest standards of purity, safety, and efficacy.
Batch-Wise Testing
Every production batch undergoes 17-parameter testing
Third-Party Validation
NABL accredited laboratory verification
Complete Traceability
Full documentation from raw material to finished product
Continuous Monitoring
Real-time quality monitoring throughout production
IMLI Quality Control Laboratory
Complete Testing Parameters
| Test Parameter | Specification Limit | Typical Result | Test Method | Frequency |
|---|---|---|---|---|
| Physical Properties | ||||
| Appearance | White crystalline powder | Complies | Visual inspection | Every batch |
| Solubility (1% solution) | Clear solution | Complies | Visual inspection | Every batch |
| Odor | Odorless | Complies | Organoleptic | Every batch |
| Chemical Properties | ||||
| Assay (Titrimetric) | 99.5% - 100.0% | 99.8% - 100.2% | USP <43> | Every batch |
| pH (1% solution) | 2.1 - 2.4 | 2.2 - 2.3 | pH meter | Every batch |
| Water Content | ≤ 1.0% (Anhydrous) 7.5-9.0% (Monohydrate) |
0.4-0.6% / 8.0-8.5% | Karl Fischer | Every batch |
| Purity Tests | ||||
| Heavy Metals (as Pb) | ≤ 10 ppm | < 5 ppm | AAS / ICP-MS | Every batch |
| Oxalic Acid | ≤ 350 ppm | 100-200 ppm | Spectrophotometric | Every batch |
| Sulphated Ash | ≤ 0.1% | 0.03-0.05% | Gravimetric | Every batch |
| Readily Carbonizable Substances | Passes test | Passes | Visual comparison | Every batch |
| Impurity Limits | ||||
| Arsenic (As) | ≤ 1 ppm | < 0.5 ppm | AAS | Every batch |
| Iron (Fe) | ≤ 50 ppm | 20-30 ppm | AAS | Every batch |
| Calcium (Ca) | ≤ 200 ppm | 80-120 ppm | AAS | Every batch |
| Chloride (Cl) | ≤ 50 ppm | 15-25 ppm | Titrimetric | Every batch |
| Sulfate (SO₄) | ≤ 150 ppm | 60-90 ppm | Turbidimetric | Every batch |
| Barium (Ba) | Passes test | Passes | Precipitation test | Every batch |
| Microbiological Tests | ||||
| Total Plate Count | ≤ 1000 CFU/g | < 100 CFU/g | Plate count method | Quarterly |
| Yeast & Mold | ≤ 100 CFU/g | < 10 CFU/g | Plate count method | Quarterly |
| E. coli | Absent in 1g | Absent | MPN method | Quarterly |
| Salmonella | Absent in 25g | Absent | Enrichment method | Quarterly |
Advanced Analytical Instruments
HPLC System
High-Performance Liquid Chromatography for purity and impurity profiling
AAS
Atomic Absorption Spectrophotometer for heavy metals analysis
Karl Fischer Titrator
Precise moisture content determination with 0.001% accuracy
UV-Vis Spectrophotometer
Quantitative analysis and colorimetric determinations
FTIR Spectrophotometer
Infrared spectroscopy for compound identification
Analytical Balance
High precision weighing with 0.0001g accuracy
Quality Testing Process Flow
Raw Material Testing
All incoming raw materials tested for identity, purity, and quality before acceptance
In-Process Testing
Continuous monitoring during fermentation, filtration, and purification stages
Finished Product Testing
Complete 17-parameter testing on every finished batch before release
Stability Testing
Accelerated and real-time stability studies to determine shelf life
Third-Party Validation
Periodic testing at NABL accredited laboratories for verification
Documentation & Release
Complete documentation and COA generation before product release