9 min read · 2026-01-28
By Rajesh Chauhan, Proprietor, Drashti Chemicals
Supplying industrial chemicals from Vadodara since 2015 — ETP coagulants, RO programs, and process chemicals with batch COA/MSDS.
Expert supply · Est. 2015
Mr Rajesh Chauhan
Founder-led industrial chemical supply from Vadodara — ETP coagulant selection, RO programs, textile and pharma utility chemicals. Batch COA/MSDS on every dispatch. GSTIN 24AGLPC6288M1ZX.
Ferric Alum vs Non-Ferric Alum: Which Coagulant is Right for Your ETP? — written for ETP plant operators and procurement managers. Drashti Chemicals is a Vadodara, Gujarat-based industrial chemical manufacturer and supplier with 150+ products, pan-India delivery and export capability.
This guide targets the keyword "non ferric alum vs ferric alum" and explains practical considerations for plant operators, procurement teams and technical managers evaluating chemical supply partners in India.
Understanding application chemistry, safe handling and dosing economics helps reduce treatment costs and maintain compliance with pollution control board discharge norms.
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Understanding Ferric and Non-Ferric Alum Grades
Ferric alum (ferrous alum) contains iron (Fe) as an impurity, typically 0.3–0.5% Fe, giving it a yellowish to brownish appearance. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Non-ferric alum is refined to iron content below 0.004%, producing a white crystalline product suitable for colour-sensitive applications. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Both grades are aluminium sulphate (Al2(SO4)3·18H2O) coagulants used in water treatment, paper sizing and industrial effluent clarification. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Ferric alum is significantly lower in cost and widely available; non-ferric alum commands a premium due to additional purification steps. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Performance Comparison in Water Treatment
Ferric alum coagulates effectively in most ETP applications but can impart a yellow tinge to treated water at high doses or low pH. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Non-ferric alum is preferred for potable water, paper mills and textile finishing where iron staining would reject the final product. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Both grades require pH adjustment to 6.5–7.5 for optimal coagulation; ferric alum may need slightly more lime due to iron hydroxide formation. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Sludge volume from ferric alum is marginally higher due to iron hydroxide precipitation, increasing sludge handling costs in large plants. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Selection Criteria for Indian Industrial Buyers
Use ferric alum for general industrial ETP coagulation where discharge colour limits are met and product quality is not iron-sensitive. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Specify non-ferric alum for drinking water plants, paper mills, pharmaceutical process water and food-grade applications. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Request batch COA showing iron content, Al2O3 percentage and insoluble matter before placing bulk orders. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Evaluate total cost including sludge disposal — non-ferric alum may reduce downstream treatment costs despite higher per-kg unit cost. For buyers searching "non ferric alum vs ferric alum" in India, working with a Vadodara-based supplier like Drashti Chemicals ensures documented quality, bulk availability and responsive commercial support.
Industrial buyers across Gujarat, Maharashtra and pan-India choose documented suppliers with batch traceability, flexible packaging from 50 kg minimum orders to tanker loads, and export documentation for Middle East and African markets. Request a quote for delivery timelines and volume-based RFQ support.
Why Source from Drashti Chemicals?
Drashti Chemicals supplies bulk industrial chemicals from Vadodara with COA, MSDS and GST-compliant invoicing. Contact us for samples, technical datasheets and a bulk quote.
| Parameter | Ferric Alum | Non-Ferric Alum |
|---|---|---|
| Iron (Fe) content | 0.3–0.5% | < 0.004% |
| Appearance | Yellowish/brownish crystals | White crystalline |
| Typical Al2O3 content | 16–17% | 17–18% |
| Best suited for | General ETP, cooling water | Potable water, paper, pharma |
| Relative cost | Lower | Higher (premium grade) |
| Sludge volume | Slightly higher | Lower |
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