Silicone Defoamer EmulsionZEELCHEM™ DF · Manufacturer & Supplier
ZEELCHEM™ DF Silicone Defoamer is a non-ionic polydimethylsiloxane (PDMS) antifoam emulsion that knocks down foam in under 3 seconds and keeps it suppressed. It is available in 10%, 20% and 30% active grades, and works from pH 1 to 13 and up to 130 °C in ETP/STP aeration tanks, textile dyeing, paper mills and chemical processes.
Silicone Defoamer Emulsion Chemical Identity
| Active polymer | Polydimethylsiloxane (PDMS) |
|---|---|
| Synonyms | Silicone antifoam, dimethicone emulsion |
| Repeat unit | –[O–Si(CH₃)₂]ₙ– |
| Repeat-unit mass | 74.15 g/mol |
| Emulsion type | Non-ionic, aqueous |
| CAS number (PDMS) | 63148-62-9 |
Silicone Defoamer Emulsion Specifications
Typical specification for ZEELCHEM™ DF. Every batch is dispatched with a batch Certificate of Analysis (COA).
| Parameter | Specification |
|---|---|
| Chemistry | Polydimethylsiloxane (PDMS) emulsion |
| CAS number (PDMS) | 63148-62-9 |
| Active matter | 10%, 20%, 30% active PDMS |
| Emulsion type | Non-ionic aqueous dispersion |
| pH (neat, 25 °C) | 6.5 – 8.0 |
| Specific gravity | 0.98 – 1.02 g/cm³ |
| Centrifuge stability | No phase separation at 3,000 rpm |
| Knockdown time | < 3 seconds |
Applications & Recommended Dosing
Typical starting doses. Final dosing depends on your water analysis and system conditions; our chemists can help you optimize it.
| Application | Dose |
|---|---|
| ETP & STP aeration basins | 10.0 – 50.0 ppm |
| Textile scouring & jet dyeing | 0.2 – 1.0 g/L |
| Pulp & paper black liquor | 50 – 200 g/ton pulp |
| Chemical synthesis & distillation | 20 – 100 ppm |
- ETP & STP aeration tanks
- Textile jet dyeing & scouring
- Pulp & paper black liquor
- Chemical synthesis & distillation
How Silicone Defoamer Emulsion Works
Enter
Low surface-tension silicone droplets (≈ 21 mN/m) enter the air–water interface.
Spread
They spread rapidly across the bubble film and thin it.
Collapse
The thinned film ruptures and foam collapses in under 3 seconds.
Key Benefits
- Instant knockdown with long-lasting suppression (hydrophobic silica activated)
- Works across pH 1–13 and up to 130 °C
- Sub-micron emulsion: no oil spotting on fabric or paper
- Safe for biological treatment systems
- Can be pre-diluted with 3–5 parts cool water for metering pumps
How much Silicone Defoamer Emulsion do you need?
Packaging, Storage & Safety
⬢Packaging
- 50 kg HDPE carboys
- 200 kg virgin HDPE drums
- 1,000 kg IBC totes
❄Storage & Shelf Life
- Store at 5 °C – 35 °C in a dry area
- Protect from freezing and excessive heat
- Shelf life: 12 months unopened in original packaging
⚠Handling & Safety
- Classified as non-hazardous
- Wear safety glasses and gloves
- Non-toxic, non-corrosive and non-flammable
Always read the Safety Data Sheet (MSDS/SDS) before handling. Pan-India dispatch from Vadodara, Gujarat.
TDS, MSDS & COA for Silicone Defoamer Emulsion
Request documents instantly on WhatsApp. ZEEL PRODUCT is ISO 9001:2015, ISO 14001:2015 & ISO 22000:2018 certified.
Safety Data Sheet (MSDS)
16-section GHS-format safety, handling and transport information.
Request MSDS →Silicone Defoamer Emulsion: Frequently Asked Questions
What is a silicone defoamer and how does it work?
It is a non-ionic PDMS emulsion. Its droplets spread over foam bubble films, thin them and collapse the foam in under 3 seconds.
What is the defoamer dosage for ETP and STP?
10–50 ppm, applied by continuous drip or spray over the foam layer of the aeration tank.
Which grades of ZEELCHEM™ DF are available?
10%, 20% and 30% active PDMS emulsions. Higher-active concentrates are available on request.
Does the defoamer work at high temperature and extreme pH?
Yes. It works from pH 1 to 13 and up to 130 °C, including pressurized jet dyeing and distillation.
Will the silicone defoamer cause oil spots on textiles?
No. The sub-micron, high-shear emulsion is designed to avoid oil spotting on fabric and paper.
Can the defoamer be diluted?
Yes. Pre-dilute with 3–5 parts cool water for metering pumps.
Is the silicone defoamer safe for biological treatment?
Yes. It is non-toxic, non-corrosive and non-flammable, and does not harm the biomass in aeration tanks.
What packaging is available?
50 kg HDPE carboys, 200 kg virgin HDPE drums and 1,000 kg IBC totes.
What is the shelf life of the defoamer emulsion?
12 months unopened, stored at 5–35 °C and protected from freezing.
Do you supply a COA with each batch?
Yes. Each batch is checked for stability and knockdown speed and ships with a COA. The TDS and GHS MSDS are available on request.
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Buy Silicone Defoamer Emulsion Direct from the Manufacturer
Bulk pricing, samples and technical support for plants across India, from Gujarat and Maharashtra to Delhi NCR and South India.