Why It Matters
Warm, aerated, nutrient-rich cooling water grows bacteria, algae and biofilm (including SRB) that foul fill, cause under-deposit corrosion and harbor Legionella. Design pairs oxidizing biocides for bulk kill with non-oxidizers and a quat for biofilm and resistant organisms
Solution Approach
Warm, aerated, nutrient-rich cooling water grows bacteria, algae and biofilm (including SRB) that foul fill, cause under-deposit corrosion and harbor Legionella. Design pairs oxidizing biocides for bulk kill with non-oxidizers and a quat for biofilm and resistant organisms RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Treatment Workflow
1
System Assessment
Characterize operating conditions—fluid composition, temperature, pressure, flow rates—and benchmark current treatment performance.
2
Chemistry Selection
Match base chemicals to your operating envelope. Factor in compatibility with existing programs, regulatory constraints, and downstream impacts.
3
Dosage & Delivery
Determine optimal treat rates through jar testing or field trials. Configure packaging (drums, totes, ISO tanks) to match consumption and storage logistics.
4
Monitoring & Adjustment
Track KPIs—coupon rates, residuals, separator performance, water quality. Adjust chemistry and dosage as conditions change.
Recommended Chemistries (8)
Sodium Hypochlorite
CAS 7681-52-9
Acids & Salts
Primary oxidizing biocide
1791 (SODIUM HYPOCHLORITE) · Class Primary oxidizing biocide; hypochlorite/HOCl oxidizes cell membranes for broad, low-cost bulk-water kill. (Spine tags this pH Adjustment; the chemistry is oxidizing-biocide.)
Melting Point: MP: 18 °C /Pentahydrate/ Boiling Point: Boiling point: 111 °C in solution Density: 1.093 for 5% solution
Full Details
Calcium Hypochlorite
CAS 7778-54-3
Specialty Additives
Biocidal Action
2208 (BLEACHING POWDER) · Class Solid chlorine donor delivering HOCl where liquid bleach handling/decay is impractical; same oxidative disinfection mechanism
Melting Point: 100 °C Boiling Point: Decomposes at 100 °C Density: 2.350 g/cu cm
Full Details
Sodium Dichloroisocyanurate (SDIC)
CAS 2893-78-9
Specialty Additives
Biocidal Action
2465 (SODIUM DICHLORO-S-TRIAZINETRIONE) · Class Stabilized (chloroisocyanurate) chlorine releases HOCl slowly, holding a more persistent oxidant residual than free chlorine
Melting Point: 225 °C Density: 0.96 at 20 °C Solubility: Soluble
Full Details
Chlorine Dioxide
CAS 10049-04-4
Specialty Additives
Biocidal Action
9191 (CHLORINE DIOXIDE) · Class ClO2 stays biocidal across a wide pH and penetrates biofilm better than chlorine, and does not form THMs; strong against established slime
Melting Point: -59 °C Boiling Point: 11 °C at 760 mmHg Density: 1.6 (Liquid at 0 °C)
Full Details
DBNPA (2,2-Dibromo-3-Nitrilopropionamide)
CAS 10222-01-2
Specialty Additives
Fast-acting non-oxidizing biocide
2923 (2,2-DIBROMO-3-NITRILOPROPIONAMIDE) · Class Fast-kill non-oxidizing biocide that hydrolyzes quickly to low-residual products; ideal for slug dosing where an oxidizer demand is too high
Melting Point: 123 to 126 °C Boiling Point: Decomposes at 190 °C Solubility: In water, 1.5 g/100 mL (15,000 mg/L)
Full Details
Glutaraldehyde
CAS 111-30-8
Specialty Additives
Broad-spectrum biocide
2810 (GLUTARALDEHYDE SOLUTION) · Class Dialdehyde cross-links cell-wall proteins; the standard non-oxidizer for biofilm and sulfate-reducing-bacteria (SRB) control, effective in dirty/high-demand water
Melting Point: < -7 °C Boiling Point: 187–189 °C at 760 mmHg (decomposes) Density: 1.062 to 1.124 at 20 °C
Full Details
Benzalkonium Chloride (BKC, ADBAC)
CAS 8001-54-5
Surfactants
Quaternary ammonium biocide
2928 · Class Cationic quat disrupts membranes and acts as a biodispersant that lifts biofilm off surfaces, complementing the oxidizers
Melting Point: 241.02 °C Density: 0.9429 g/cu cm at 25 °C Solubility: Very soluble in alcohol, acetone; slightly solu…
Full Details
Isothiazolinone(CMIT/MIT)
CAS 26172-55-4
Specialty Additives
Preservation
CMIT/MIT isothiazolinone is a standard rotational non-oxidizing cooling-tower biocide for algae/bacteria, alternated with DBNPA/glutaraldehyde to limit resistance.
Melting Point: 54-55 °C Density: For a mixture of 5-chloro-2-methyl-3(2H)-isothi… Solubility: Solubility in g/100 mL solvent: water, infinite
Full Details
Related Product Families
● Available
Oxidizing Biocides
Sodium hypochlorite, chlorine dioxide precursors, and bromine-based oxidizers for primary microbiological control
Biocidal Action
3 chemistries
View family
● Available
Non-Oxidizing Biocides
DBNPA, glutaraldehyde, isothiazolinone, and quat-based biocides for biofilm control
Biocidal ActionPreservation
3 chemistries
View family