EX-CELL® Antifoam - gamma irradiated

Cat. No.: E475852

GRADE & PURITY gamma irradiated

Storage

Room temperature

Overview

EX-CELL®ANTIFOAM is a USP Grade non-ionic emulsion (simethicone) designed for use in the pharmaceutical and veterinary biological industries to aid in the control of foaming typically associated with the use of culture medium in bioreactors.Through formulation optimization, utilization of a quantitative assay and an understanding of the nonspecific binding of simethicone, SAFC is able to report the actual simethicone concentration of the gamma irradiated finished material. As a result of this development, SAFC offers an optimized formulation ensuring a consistent product.This product is of non-animal origin formulated from a 30% Simethicone Emulsion from DOW CORNING Q7-2587

Specifications

Specifications & Purity

gamma irradiated

Storage

Room temperature

Application Protocols

No item-specific protocols are provided in the Product Data. The following are general, non-binding guidance examples for antifoam use in cell culture and fermentation. Validate and optimize for your system.

• Mammalian cell culture (shake flask/bioreactor):
  • Pre-equilibrate media and establish baseline foam tendency.
  • Add antifoam at 10–30 ppm initially; monitor foam probe or visual foam height. If trips persist, increase by 5–10 ppm increments.
  • During feeds or pH adjustments, pre-dose to prevent spikes. Record cumulative addition for comparability across runs.
• Microbial fermentation:
  • Start at 50–100 ppm prior to induction/high-oxygen phases.
  • Employ PID control of a peristaltic antifoam pump linked to a foam sensor for consistent response.
• Buffer/method development:
  • For filtration or column packing with surfactant-containing buffers, trial 5–20 ppm to reduce foaming. Confirm no adverse impact on resin performance.
• Aseptic handling:
  • If sterile filtration is feasible for your formulation, filter through 0.2 μm using low-protein-binding membranes; otherwise, add aseptically via closed connections.

Documentation:

• Capture dose-response curves (foam height vs. time), DO control behavior, and downstream effects (filter flux, HCP, aggregates). Adjust standard operating ranges accordingly.

Biological Roles

EX-CELL Antifoam is an auxiliary process additive with no intrinsic biological role. It is used to manage foam in biological systems.

Bioprocess context (general, literature):

• Foam in cell culture: Proteins and peptides act as surfactants, stabilizing bubbles and forming persistent foam. Excessive foam can cause cell loss via overflow, wetting of filters, and contamination risk.
• Impact on cells: Appropriate antifoam dosing can mitigate shear at the air–liquid interface and minimize foam-induced stress. Overdosing may alter gas transfer and can affect cell membranes or product quality; titration and characterization are essential.
• Oxygen transfer: Antifoams can change bubble coalescence and kLa. Monitor DO control effort when adjusting doses.
• Downstream implications: Residual antifoam may interact with filtration membranes, chromatography resins, or analytical assays (e.g., particle counting, UV background). Include antifoam in process characterization studies.

Note: No clinical or therapeutic functions are implied. Performance and biocompatibility should be verified for the specific cell line and process. Item-specific biocompatibility data are not provided; refer to CoA/Spec Sheet or perform internal qualification.

Buffer Applications

This product is not a buffering agent. However, it can be used in buffer preparation and handling to suppress foam formation during mixing, filtration, and pumping.

Practical guidance (general):

• Addition: If foam arises when preparing protein-containing buffers or during CIP/SIP surfactant rinses, small amounts of antifoam can be added to control bubbles. Typical exploratory range is 10–100 ppm (literature guidance; not product-specific).
• Compatibility: Verify that the antifoam does not interfere with downstream analytical assays (e.g., UV-Vis baselines, DLS particle sizing) or membrane performance.
• pH/Ionic strength: Antifoams generally do not contribute buffering capacity or significant ionic species; they are largely inert with respect to pH. Confirm emulsion stability at extreme pH values before use.
• Sterility: For sterile buffers, add antifoam via sterile filtration only if validated for the formulation; some silicone emulsions are not readily 0.2 μm filterable. Alternatively, add aseptically from pre-sterilized stock if available.

No item-specific buffer-use specifications are provided in the Product Data.

Green Alternatives

Sustainability considerations for antifoam selection (general, literature):

• Common platforms:
  • Silicone-based: High efficacy at low dose; durable, thermally stable. Potential drawbacks include persistence in the environment and challenges in removal from process streams and analytics.
  • EO/PO polyether: Effective, water-compatible, and often easier to flush, but may require higher doses and can contribute organics to wastewater.
  • Bio-based oils/fatty alcohols: Renewable feedstocks; variable performance and potential for oxidation/odor.

Comparison (general):

• Dose efficiency tends to be highest for silicone oils, reducing total mass introduced. However, if downstream removal and environmental persistence are key, polyether or bio-based options can be considered.
• Evaluate biodegradability, COD/BOD impact, and extractables. For single-use systems, assess compatibility with film chemistries and leachables.

Practical steps to improve greenness regardless of choice:

• Optimize sparger design, agitation, and antifoam control loops to minimize dosing.
• Use in-line de-aeration or headspace pressure strategies to reduce foam formation.
• Implement closed-loop dosing triggered by foam probes to avoid overuse.

This listing does not specify the formulation type; consult the CoA/Spec Sheet to assess environmental attributes and choose the best-fit option for your sustainability goals.

Pharmaceutical Uses

No therapeutic or clinical claims are made. For research use only.

Manufacturing/formulation context (general):

• Process aid in upstream bioprocessing: Antifoams are frequently used during seed train and production bioreactor operations to mitigate foam, supporting consistent aeration and preventing sensor false-positives.
• Downstream operations: During harvest, centrifugation, filtration, and media/buffer tank operations, limited antifoam can minimize entrained gas and improve level control.
• Excipient status: Some antifoam chemistries (e.g., simethicone) appear in pharmacopeial monographs for oral products, but that is not indicative of this item. This listing does not specify any pharmacopeial grade or compliance; consult the CoA/Spec Sheet for status.
• Regulatory considerations: For GMP manufacturing, establish a supplier qualification package (CoA, TSE/BSE statements if applicable, residuals profile) and conduct process-specific clearance studies to define acceptable carryover into drug substance.

Given the absence of item-specific compliance data in the Product Data, treat this product as research-grade and qualify internally before any use in regulated processes.

Physical Properties

• Appearance: Not specified for this item; refer to CoA/Spec Sheet.
• Density, viscosity, refractive index, pH (of dispersion): Not specified for this item; refer to CoA/Spec Sheet.
• Boiling point / melting point / flash point: Not specified for this item; refer to SDS and CoA/Spec Sheet.
• Solubility: Antifoams are typically supplied as oils or emulsions; silicone-based products are insoluble in water but can be supplied as water-dispersible emulsions; EO/PO polyethers are water-miscible (literature, general).
• HLB/Surface activity: Antifoam performance correlates with low/intermediate HLB and the ability to spread on aqueous foams (literature, general).

Practical notes (general, literature):

• Dispersibility: Effective antifoam action requires rapid dispersion into the foaming phase. Emulsion concentrates often require gentle inversion or rolling before use to re-homogenize.
• Temperature effects: Viscosity and spreading improve with moderate temperature increase; avoid excessive heat that could destabilize emulsions.
• Ionic strength/proteins: Salts and proteins can alter antifoam performance; confirm dosing under process-relevant conditions.

No item-specific physicochemical specifications are provided in the Product Data. For precise values (e.g., viscosity, solids content, particle size of emulsion), consult the product’s CoA/Specification Sheet and SDS.

Quality & Grades

• Grade/Purity: Not specified for this item; refer to CoA/Spec Sheet.
• Research Use Note: For research use only.

Interpretation and context (general):

• Antifoams intended for life-science and cell culture workflows are typically formulated with low-foaming, low-extractable components and may be filtered or manufactured to minimize bioburden and particulates. While some offerings are suitable for GMP manufacturing, this listing does not state such status; treat as research-grade unless otherwise documented on the CoA/Spec Sheet.
• Key quality attributes for bioprocess antifoams (general expectations):
  • Consistent defoaming efficacy across shear rates and aeration conditions;
  • Low impact on cell growth, protein expression, and downstream purification (e.g., chromatographic fouling, filtration throughput);
  • Lot-to-lot reproducibility and documented traceability.
• If the formulation includes a stabilizer, preservative, or emulsifier system, these will influence compatibility with sensitive cultures or purification membranes. This Product Data does not specify the presence or type of stabilizers; verify on the CoA/Spec Sheet.

Recommendations:

• Qualify each new lot in a small-scale mimic (shake flask/benchtop bioreactor) before scale-up.
• Document baseline oxygen transfer and foam profiles to set control limits for dosing.

Reaction & Applications

This product functions as a process aid to control foam rather than as a stoichiometric reactant.

Bioprocess and lab applications (general, literature):

• Mammalian cell culture (e.g., CHO, HEK): Mitigates foam caused by proteins, peptides, and surfactants under sparging/agitation. Helps maintain consistent gas–liquid mass transfer without overflow/level-sensor trips. Add bolus doses or feed via PID-controlled antifoam pumps.
• Microbial fermentation (e.g., E. coli, yeast): Controls vigorous foam during high-oxygen feeds. Select chemistries that do not inhibit growth or affect expression systems.
• Downstream processing: Suppresses foam in harvest, clarification, and buffer prep tanks; reduces entrained air during filtration and column packing.
• Analytical/sample prep: A trace amount can collapse foam during vigorous vortexing, sonication, or when using detergents.

Practical tips (general):

• Start with low dose ranges of 10–100 ppm (0.001–0.01% v/v) and titrate to effect while monitoring oxygen transfer rate (OTR), kLa, and viable cell density (literature guidance; not product-specific).
• Add antifoam upstream of expected foam events (feed starts, pH pulses, media changes). Pre-wet addition lines to minimize holdup.
• Confirm that antifoam does not interfere with sensor performance (capacitance/foam probes) or downstream HCP/aggregate analytics.

No item-specific application data are provided; validate conditions in your system architecture.

Reaction Conditions

There are no intrinsic reaction conditions for this product; it is a process aid. The following are general operational guidelines for dosing in foaming systems (literature, not product-specific):

• Dose range: Begin at 10–50 ppm (0.001–0.005% v/v) for cell culture; escalate in small increments up to 100–200 ppm if needed. For severe microbial foams, ranges up to 500 ppm can be explored with careful monitoring.
• Addition timing: Pre-dose before anticipated foam events (e.g., feed start, anti-foam probe trips), or use closed-loop control via foam/level sensors.
• Mixing: Ensure adequate dispersion. For emulsions, gentle pre-mix and slow addition to a high-shear zone (impeller vicinity) improve efficacy.
• Temperature/pH window: Most antifoams are effective from ambient to typical bioprocess temperatures (20–37 °C) and neutral pH; verify stability at extremes.
• Compatibility checks: Assess impact on DO control, kLa, viable cell density, product titer, filterability, and chromatography. Include blanks and carryover studies.
• Sterility: When used in aseptic processes, introduce via sterile connections or validated filtration where feasible.

These parameters are general literature guidance only. Item-specific directions for EX-CELL Antifoam are not provided; consult the CoA/Spec Sheet and SDS, and perform small-scale trials.

Safety & Handling

• GHS/Signal word/H-statements/Pictograms: Not specified for this item; refer to SDS for authoritative classification.
• Primary hazards (general for antifoam formulations): Usually low acute toxicity; may cause eye/skin irritation. Liquid spills can make floors extremely slippery. Aerosol/mist inhalation should be avoided. Combustibility depends on carrier fluid; consult SDS.
• PPE: Laboratory coat, safety glasses, and appropriate chemical-resistant gloves (e.g., nitrile). Use in a well-ventilated area. For large-scale handling, consider splash protection and closed addition to vessels.
• Handling: Mix by gentle inversion/rolling before use to ensure homogeneity. Avoid generating aerosols. Add via sterile connections when used in cell culture/bioreactors. Do not pipette by mouth.
• Incompatibilities: Strong oxidizers may degrade organic components. Cationic surfactants can interact with some polyether antifoams (literature, general). Avoid contamination with strong acids/bases that can destabilize emulsions.
• First aid (overview): Eye contact—rinse cautiously with water for several minutes; remove contact lenses if present and easy to do; seek medical attention if irritation persists. Skin—wash with soap and water. Inhalation—move to fresh air. Ingestion—rinse mouth; seek medical advice. Follow SDS guidance.
• Environmental/housekeeping: Contain spills with absorbent; clean thoroughly to remove slip hazard. Prevent entry into drains where prohibited. Dispose in accordance with local regulations. Always defer to the product-specific SDS for definitive safety information.

Solvent Selection

This product is an antifoam formulation, not used as a solvent. Traditional solvent selection criteria are not directly applicable.

Relevant compatibility considerations (general):

• Aqueous systems: Most bioprocess antifoams are designed for rapid dispersion in water-based media and feeds. Silicone emulsions disperse; EO/PO polyethers dissolve or disperse depending on composition (literature, general).
• Organic phases: Silicone oils have broad compatibility with many organic solvents but are typically employed at trace levels. Verify compatibility with extraction solvents if used during workup.
• Membrane processes: Some antifoams can foul ultrafiltration or microfiltration membranes; evaluate downstream compatibility when selecting an antifoam.

Selection guidance (general):

• Choose silicone-based products for strong, persistent foams and high-aeration conditions; consider polyether/vegetable-based options where silicone contamination of product or analytics is a concern.
• For chromatography-intensive processes, favor antifoams with low nonspecific binding to resins and minimal UV background (confirm via CoA/Spec Sheet and internal testing).

Storage & Reconstitution

• Storage conditions (item-specific): Room temperature (as provided in Product Data).
• Shipped in: Not specified for this item; refer to CoA/Spec Sheet.
• Container: Keep tightly closed to prevent contamination and evaporation of any volatile carriers. Store upright to minimize leak risk.
• Protection: Avoid freezing and excessive heat; thermal cycling can destabilize emulsions. Protect from direct sunlight.
• Homogenization before use: Gently invert or roll the container to re-suspend any settled phases. Avoid vigorous shaking that can entrain air.
• Aseptic use: When used in sterile processes, wipe external surfaces, and connect via sterile, closed systems. If filtration is part of your practice, confirm filterability with your membrane type.
• Reconstitution/dilution: Not specified for this item; refer to CoA/Spec Sheet. If a working dilution is prepared, use compatible water or buffer, mix gently to uniformity, and record preparation details. Prepare fresh as needed to minimize microbial risk.
• Shelf life: Not specified for this item; refer to CoA/Spec Sheet.

Always review the product-specific SDS and CoA for definitive guidance on storage stability and handling.

Structure & Identity

This product is an antifoam formulation intended for life-science and bioprocess applications (EX-CELL Antifoam). Specific chemical identity is not disclosed.

• Molecular formula: Not specified for this item; refer to CoA/Spec Sheet.
• Molecular weight: Not specified for this item; refer to CoA/Spec Sheet.
• SMILES: Not specified for this item; refer to CoA/Spec Sheet.
• InChIKey / CAS / CID: Not specified for this item; refer to CoA/Spec Sheet.

General notes (literature/context):

• Commercial antifoams for cell culture are commonly based on one of the following chemistries:
  • Polydimethylsiloxane (PDMS) emulsions sometimes with silica;
  • Poly(ethylene oxide)-poly(propylene oxide) (EO/PO) block copolymers;
  • Vegetable-oil or fatty alcohol blends for food/fermentation.
• Structural features (typical): nonionic, amphiphobic domains that disrupt foam lamellae at gas–liquid interfaces. Silicone-based antifoams feature –Si–O– backbones with methyl substituents; EO/PO types contain polyether chains with tunable hydrophile–lipophile balance (HLB).
• Physical form is typically a liquid or emulsion concentrate designed to disperse in aqueous media.

2D description (generic):

• Silicone oils: repeating –[Si(CH3)2–O]–n– units (linear), optionally with silica fillers.
• EO/PO copolymers: HO–(CH2CH2O)x–(CH(CH3)CH2O)y–(CH2CH2O)z–H tri-block patterns (Pluronic-like), providing interfacial activity without ionic charge.

Because this is a formulated product, a single defined molecular structure is typically not applicable; performance is governed by formulation rather than a discrete compound.

Synthetic Utility

Although not a synthetic reagent, antifoam can be valuable in chemical synthesis operations where foaming complicates processing.

Use cases (general, literature):

• Workup and extractions: A drop of antifoam can collapse proteinaceous or detergent-stabilized emulsions, aiding phase separation in separatory funnels or liquid–liquid micro-extractions.
• Polymerizations/fermentation-coupled chemo: Suppresses foam in aqueous or emulsion polymerizations and chemoenzymatic steps with air sparging.
• Reactor operations: Controls foam during gas-evolving reactions (e.g., neutralizations, carbonate/bicarbonate decompositions) and during vigorous mechanical agitation.

Practical considerations:

• Use minimal effective quantities to avoid contamination of final products. Verify that trace antifoam does not interfere with spectroscopic analyses (e.g., NMR baseline, GC inlet fouling) or chromatographic separations.
• For downstream removal, consider adsorptive polishing (activated carbon, silica) or phase stripping steps where applicable.

No reaction-specific kinetics or mechanism apply here; performance arises from interfacial phenomena rather than chemical transformation. Item-specific composition is not provided; confirm compatibility with your solvents and substrates before use.

Target Specificity

Not applicable. This product is not a biological targeting reagent (e.g., not an antibody or ligand). No antigen/epitope/isotype or species reactivity applies.