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Third-gen THPS tech – Higher efficacy & long-lasting control
Enhanced bio-penetration – Deeply removes stubborn biofilm & deposits
Broad-spectrum protection – Inhibits MIC, iron sulfide, acid, schmoo
Ready-to-use liquid – Direct dosing, no pre-dilution needed
Harsh-condition stable – Performs reliably in oilfield & high-salt environments
Oilfield water flooding – Injection water protection
Oil/gas pipeline service – Biofilm removal & line protection
Drilling/completion fluids – Sterilization & stabilization
Oilfield fracturing – Fracturing fluid preservation
Industrial cooling water – System microbial control
| Brand | Solvay |
| Division | Novecare |
| Product Series | TOLCIDE® Series |
| Product Type | Industrial biocide, phosphonium salt biocide |
| Core Ingredient | Tetrakis(hydroxymethyl)phosphonium sulfate (THPS) |
| Chemical Category | Phosphonium salt biocide |
| Form | Transparent to pale yellow liquid |
Q1: What is Solvay Tolcide PS50a Fungicide primarily used for?
A: Solvay Tolcide PS50a Fungicide is a broad-spectrum preservative designed to inhibit fungal growth in water-based industrial formulations, including coatings, adhesives, construction chemicals, and polymer dispersions.
Q2: Is Tolcide PS50a compatible with common polymer systems and surfactants?
A: Yes — Tolcide PS50a demonstrates good compatibility with acrylic and styrene-acrylic emulsions, PVA dispersions, nonionic and anionic surfactants, and most pH-stabilized aqueous systems within the typical range of 6–9.
Q3: How should Tolcide PS50a be dosed in finished formulations?
A: Dosage depends on formulation composition, storage conditions, and microbial challenge level. It is typically used at low concentrations, generally ranging from 0.1% to 2% by weight of the final product, with optimal performance achieved through application-specific efficacy testing.
Q4: Does Tolcide PS50a require pH adjustment for stability or activity?
A: Tolcide PS50a performs best in mildly acidic to neutral aqueous systems. While it remains stable across a broad pH range, maximum fungicidal efficacy is typically observed between pH 6.5 and 8.5. Significant deviations may affect performance and shelf life.
Q5: Can Tolcide PS50a be used in combination with other biocides?
A: Yes — Tolcide PS50a is often used in synergistic blends with isothiazolinones or benzisothiazolinone derivatives to broaden antimicrobial spectrum and enhance long-term preservation, particularly in challenging environments with high organic load or repeated contamination risk.
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E-mail: wangxingqiang@ericwchem.com
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