Quality Assurance & Laboratory Protocols
Chemical consistency is the cornerstone of trust. At Uma Dye Chem, every batch of Ammonium Bisulphite undergoes multi-stage laboratory verification before release.
Zero Compromise on Chemical Purity & Batch Consistency
At Uma Dye Chem, quality control is not merely a final inspection step—it is embedded into every stage of synthesis, starting with high-purity sulfur dioxide, anhydrous ammonia gas, and treated process water.
Our dedicated in-house analytical testing laboratory at Unava, Gujarat operates under strict standard operating procedures (SOPs). Every batch produced is assigned a unique tracking number, analyzed against tight tolerance bands, and archived for full traceability.
The Uma Dye Chem Quality Pledge
Laboratory Testing Regimen
Standard analytical methods executed on all outgoing batches.
Iodometric Titration
Determines exact active assay and SO2 equivalent using standardized iodine volumetric titration against starch indicator.
Specific Gravity & Density
Measured using high-precision digital density meters and calibrated hydrometers corrected to 20°C standard reference temperature.
pH Potentiometry
Dual-junction electrode pH meters calibrated with NIST buffers ensure pH is controlled between 4.0 and 5.5 to avoid SO2 outgassing.
Trace Metal & Impurities
Spectrophotometric screening of Iron (Fe < 5 ppm) and heavy metals (Pb, As) for Food Grade and sensitive catalysis applications.
Need a Sample Certificate of Analysis (COA)?
We provide comprehensive batch COA, Safety Data Sheets (SDS/MSDS), and technical documentation for any of our 10 products upon request.