Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Dowsil 7305 Defoamer

DOWSIL 7305 is a high-efficiency water-based silicone defoamer with 5% active content (polydimethylsiloxane), engineered for harsh industrial environments. It maintains stable defoaming performance in pH 2–12 and temperatures ≤80°C, leveraging nano-scale dispersion technology to achieve rapid bubble collapse (≤15 sec) and long-term suppression (24+ hours). With dynamic surface tension as low as 25.2 mN/m, it boosts process efficiency in wastewater treatment and paper pulping systems. FDA-compliant (21 CFR 176.210), it suits eco-sensitive uses like food processing wastewater, while being compatible with anionic/nonionic surfactants to reduce foam-caused equipment corrosion and energy loss.

Product Information of Dowsil 7305 Defoamer

  1. Broad-Spectrum Efficiency: Eliminates >95% of micron-level bubbles, especially effective in high-solids systems (e.g., sludge dewatering).

  2. Extreme Condition Adaptability: Active in strong acid/alkali (pH 2–12) and high-salinity wastewater; resists transient thermal shock (≤80°C).

  3. Low-Dosage Persistency: Recommended 50–200 ppm usage cuts operational costs by reducing frequent replenishment.

  4. Eco-Compliance: APEO-free, VOC <50 g/L; certified under EU REACH and China GB 24408.

Areas of Application of Dowsil 7305 Defoamer

  1. Wastewater Treatment: Suppresses biological foam in activated sludge and MBR systems to improve aeration efficiency.

  2. Paper Industry: Reduces flotation and deposits in pulp bleaching, enhancing sheet smoothness.

  3. Food Processing: Controls foam in fermenters and cleaning lines, meeting indirect food contact standards.

  4. Chemical Production: Prevents bubble defects in water-based coatings/adhesives production.

Specifications Of Dowsil 7305 Defoamer

Type
Polyether-modified silicone defoamer
Appearance
Milky liquid
Active Content
57%
Viscosity (25°C)
2000 mPa·s
Dynamic Surface Tension
25.2 dyn/cm (0.5% solution)
pH Value
7.4
Flash Point
>101℃
Recommended Dosage
0.05%-0.5% (on total formulation)
Packaging
25kg/drum or 200kg/IBC


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