CHO Medium Base - BioReagent

Cat. No.: C1528697

CALIDAD & PUREZA BioReagent

Storage

Room temperature

Shipped In

Normal

Descripción general

Used with different carbon sources for the differentiation test of anaerobic bacteria

Especificaciones

Especificaciones y pureza

BioReagent

Condiciones de almacenamiento de almacenamiento

Room temperature

Enviado en

Normal

Grado

BioReagent

Product Line

Productos biológicos

Application Protocols

• Item-specific (Product Data)
  • No validated application protocols are provided for this SKU in the supplied data. Refer to the product CoA/Spec Sheet for any manufacturer-recommended procedures.
• General, non-validated guidance (literature; not item specifications)
  • If powder: Add the measured powder gradually to ~80–90% of the final volume of sterile, cell-culture–grade water under stirring. Rinse container to transfer residues. Adjust volume to final, mix until fully dissolved. If required by formulation, add NaHCO3 and supplements (e.g., L-glutamine) per instructions. Adjust pH/osmolality as needed. Sterile-filter through 0.22 µm into sterile bottles.
  • If liquid: Warm to room temperature before use. Do not heat above 37°C. If opened outside sterile environments, consider sterile filtration before critical applications.
  • Equilibration: Pre-equilibrate bicarbonate-buffered media in 5% CO2 to stabilize pH (aim ~7.0–7.4) prior to inoculation.
  • Use window: Many reconstituted media are used within 4–8 weeks when stored at 2–8°C and protected from light; confirm for this item in the CoA/Spec Sheet (not specified here).

Biological Roles

• Item-specific (Product Data)
  • Specific biological roles/components for this SKU are not detailed; refer to CoA/Spec Sheet.
• Literature/general context for CHO media
  • Nutrient supply: Provides essential and non-essential amino acids for protein synthesis; glucose or alternative carbon sources for ATP production via glycolysis and TCA cycle; lipids or precursors for membrane biosynthesis; nucleoside precursors where selection systems require them (e.g., HT for DHFR pathways).
  • Ionic/osmotic homeostasis: Inorganic salts maintain membrane potential, osmotic balance, and serve as cofactors (e.g., Ca2+ in signaling, Mg2+ in ATP-dependent enzymes, phosphate in phosphorylation reactions).
  • Buffering and pH control: Bicarbonate/CO2 and optional zwitterionic buffers keep extracellular pH within the physiological window, supporting enzyme activities and transport processes.
  • Trace elements and vitamins: Support redox balance (e.g., riboflavin, niacinamide), one-carbon metabolism (folate), and antioxidant defenses (e.g., ascorbate, selenium-dependent enzymes when supplemented).
  • Adaptation to serum-free growth: CHO media bases often underpin serum-free, protein-free, or chemically defined systems that reduce variability and facilitate consistent cell growth and productivity, provided appropriate supplements and feeds are included.
  • Byproduct management: Balanced formulations help moderate lactate and ammonium accumulation by leveraging alternative carbon sources or optimized amino acid ratios; actual performance is cell-line and process dependent.

Buffer Applications

• Item-specific (Product Data)
  • Buffer system details are not specified for this item; refer to CoA/Spec Sheet.
• Literature/general guidance for CHO media as buffered systems
  • Typical buffering: Sodium bicarbonate in equilibrium with 5% CO2 provides primary buffering around pH 7.0–7.4. Some workflows add 10–25 mM HEPES to stabilize pH during open manipulations outside CO2 incubators.
  • Practical setup
    • Pre-equilibration: After reconstitution, equilibrate media in a CO2 incubator to allow pH to stabilize before inoculation.
    • pH monitoring: Use sterile pH probes or indicators; phenol red, if present, offers a qualitative cue but is not a substitute for measurement.
  • Osmolality control: Maintain typical osmolality for CHO cells near 280–330 mOsm/kg for basal media. Feed or concentrated media intentionally exceed this; monitor carefully to avoid osmotic stress.
  • Additives impact: HEPES increases buffering capacity independent of CO2 but can contribute to phototoxicity under strong light; zwitterionic buffers have minimal temperature dependence compared to bicarbonate systems.
  • Not a classical buffer kit: While it provides buffering capacity, CHO Medium Base is a nutrient medium rather than a dedicated buffer concentrate. For electrophoresis or analytical buffering needs, dedicated buffer systems are preferred.

Green Alternatives

• Item-specific (Product Data)
  • No alternate “green” formulation details are specified for this item; refer to CoA/Spec Sheet.
• Literature/general sustainability considerations for media bases
  • Powder vs liquid formats: Dehydrated powders reduce shipping mass/volume and cold-chain requirements, lowering carbon footprint. Liquids save preparation time but may require refrigerated transport in some cases.
  • Animal-component-free (ACF) and chemically defined (CD) media: Reduce lot-to-lot variability and ethical/sourcing concerns associated with serum or hydrolysates. If the CHO Medium Base is ACF/CD (Not specified for this item), this can be advantageous environmentally and for regulatory readiness.
  • Packaging: Prefer recyclable HDPE bottles or lined fiber drums for bulk powders; consolidate shipments to minimize packaging waste.
  • Process efficiency: Media that support higher viable cell densities and titers can reduce overall resource consumption per gram of product in bioprocess R&D.
  • Water and energy: Preparing media at room temperature, minimizing autoclaving (when sterile filtration suffices), and employing closed mixing systems reduce energy and water use.
  • Waste minimization: Prepare only volumes needed; implement sterile aliquoting to extend in-use life; neutralize and dispose of spent media in accordance with institutional and local regulations.

Pharmaceutical Uses

• Item-specific (Product Data)
  • Pharmacopeial status, GMP compliance, and excipient designation: Not specified for this item; refer to CoA/Spec Sheet.
• Literature/general context (manufacturing/formulation perspective; no therapeutic claims)
  • Upstream bioprocess development: CHO Medium Base is typically used in cell-line development, clone screening, and small- to pilot-scale upstream studies for biologics. Media composition can influence critical quality attributes (CQAs) such as glycosylation patterns; therefore, media control is integral to QbD frameworks.
  • Raw material control: For regulated environments, qualification includes vendor audits, CoA review, incoming testing (bioburden/endotoxin for liquids), and change control. Traceability and lot-to-lot consistency are key.
  • Platform processes: Many organizations develop platform media/feed strategies for CHO. A robust basal medium compatible with multiple feeds reduces process complexity.
  • Single-use systems: Powdered media reconstituted in single-use mixers minimize cross-contamination risks and cleaning validation burden.
  • Scale-up considerations: Solubility, mixing time, and pH/osmolality set-points must be replicated across scales. Sterile filtration capacity and filter selection (low protein-binding membranes) are part of the readiness plan.

Physical Properties

• Item-specific (Product Data)
  • Appearance: Not specified for this item; refer to CoA/Spec Sheet.
  • Physical state: Not specified for this item; refer to CoA/Spec Sheet.
  • pH (at use concentration): Not specified for this item; refer to CoA/Spec Sheet.
  • Osmolality: Not specified for this item; refer to CoA/Spec Sheet.
  • Solubility: Intended to be fully soluble in purified water at the recommended reconstitution volume; specific solubility details not specified for this item; refer to CoA/Spec Sheet.
• Literature/general values (typical for CHO media bases; not item specifications)
  • pH (post-reconstitution, equilibrated with 5% CO2): typically ~7.0–7.4 (depends on bicarbonate/CO2 system and any HEPES present).
  • Osmolality: commonly in the 270–340 mOsm/kg range; concentrated or feed media can be significantly higher by design.
  • Density (liquid, ready-to-use): ~1.00–1.02 g/mL near ambient temperature, varying with solute load.
  • Refractive index: rarely specified for culture media; not generally used as a QC parameter.
  • Solubility behavior: Dehydrated media generally dissolve in room-temperature water with gentle stirring; some components (e.g., certain vitamins) may benefit from light protection; complete dissolution typically requires sequential addition and adequate mixing to avoid local supersaturation.
  • Temperature sensitivity: Certain vitamins and amino acids (e.g., L-glutamine) can degrade with heat or prolonged storage in solution; stability is enhanced by cool storage and by using stable dipeptide forms (e.g., L-alanyl-L-glutamine) in some formulations.

Quality and Grades

• Item-specific (Product Data)
  • Grade: BioReagent.
  • What this implies for this item: Manufactured for laboratory research workflows, including cell culture and bioprocess development. Specific contaminant limits (endotoxin, bioburden, heavy metals, mycoplasma, UV/fluorescence background) are Not specified for this item; refer to CoA/Spec Sheet.
• General guidance on grades (literature/explanatory)
  • BioReagent grade: Indicates suitability for biological research with attention to component quality and consistency. It does not by itself attest to GMP production, clinical suitability, or pharmacopeial compliance.
  • QC considerations in CHO media: Typical QC panels may include pH and osmolality (after reconstitution), component identity/assay, sterility (for liquids), endotoxin, and appearance. Low trace-metal variability can be important for recombinant protein quality attributes; verify with the lot-specific CoA if critical.
  • Stabilizers/supplements: Some media include stabilizers or antioxidants, or may be designed for use with separate supplements (e.g., glutamine, ITS). For this SKU, the presence/absence of stabilizers is Not specified for this item; refer to CoA/Spec Sheet.
  • Consistency and process transfer: When transferring processes, match medium base grade/lot and verify performance in small-scale bioreactors or shake flasks before scale-up.

Reaction and Applications

• Item-specific (Product Data)
  • Manufacturer Applications: Not specified in the provided catalog excerpt.
• Literature/general applications for CHO Medium Base (research use)
  • Mammalian cell culture: Basal medium for maintenance and expansion of Chinese Hamster Ovary (CHO) cell lines (e.g., CHO-K1, CHO-S, DG44, DUXB11) in adherent or suspension formats, often supplemented with feeds and specific growth factors.
  • Bioproduction R&D: Used in upstream development for recombinant protein (e.g., mAb, Fc-fusion, enzymes) expression screening, clone selection, media/feed optimization, and scale-up studies from shake flasks to bench-top bioreactors.
  • Transient/stable expression workflows: Compatible (in concept) with transfection workflows where medium base is combined with supplements and controlled feed strategies to support productivity and quality attributes (glycosylation, charge variants). Specific compatibility must be validated empirically.
  • Process variables supported by a robust base: Sufficient amino acid balance, appropriate osmolality, and buffering to tolerate dissolved CO2 levels in high-aeration systems; glucose/lactate management via feeding strategies.
  • Not chemistry-reaction focused: As a biological medium, it is not used as a solvent/reagent in synthetic organic chemistry.
• Practical notes
  • Sterility is paramount; filter-sterilize reconstituted media (0.22 µm) if not supplied sterile.
  • Consider glutamine source (free vs dipeptide), HT supplementation for DHFR-based selection, and lipids/insulin/transferrin for serum-free adaptation as required by your cell line.

Reaction Conditions

Classical chemical reaction conditions are not applicable to a CHO Medium Base. Instead, consider culture conditions (literature/general; not item-specific):

• Temperature: CHO cells are commonly maintained at 36–37°C; mild hypothermia (31–34°C) is sometimes applied post-induction to influence productivity/quality.
• Atmosphere: 5% CO2 for bicarbonate-buffered systems; oxygen transfer matched to cell density using shaking speed, sparging, and surface area.
• pH: Typically controlled near 7.0–7.2 in bioreactors; allowed to drift within 6.8–7.4 in shake flasks depending on process.
• Osmolality: Basal cultures ~280–330 mOsm/kg; fed-batch may rise to 350–450 mOsm/kg depending on strategy and cell-line tolerance.
• Feeds: Concentrated nutrient feeds (amino acids, glucose, lipids, trace elements) are introduced per DO/pH/lactate trajectories and cell growth phase.
• Sterility: Use aseptic technique; 0.22 µm filtration for reconstituted media if not supplied sterile. Note: These are general culture parameters reported in the literature and are not specifications for this item. Always optimize empirically for your cell line and process.

Safety and Handling

• Item-specific (Product Data)
  • GHS classification, signal word, pictograms, H-statements: Not specified for this item; refer to SDS.
  • Storage conditions: Room temperature (per Product Data). Protect integrity by keeping container tightly closed and dry.
  • Shipping: Shipped under normal conditions.
  • Research use: For research use only.
• General safety guidance (literature/best practice; not item-specific)
  • PPE: Wear lab coat, gloves, and safety glasses. Use a dust mask/respirator if handling powders that may generate dust.
  • Hazards: Culture media bases are generally of low acute toxicity but can cause irritation to eyes/skin/respiratory tract, particularly in powder form. Nutrient-rich solutions support microbial growth—maintain sterility and dispose of used media as biohazardous waste when applicable.
  • Incompatibilities: Avoid contact with strong oxidizers and strong acids/bases that could degrade components. Keep powders dry; moisture uptake can lead to caking and composition drift.
  • First aid (overview): Inhalation—move to fresh air. Skin/eye contact—rinse with water for several minutes; remove contaminated clothing. Ingestion—rinse mouth; seek medical advice. Always consult the product SDS for authoritative instructions.
  • Handling tips: If sterile liquid, avoid repeated freeze–thaw. If powder, open in low-humidity environment; reseal promptly. Protect reconstituted solutions from light to minimize vitamin degradation.

Solvent Selection

• Item-specific (Product Data)
  • Intended diluent: Not specified for this item; refer to CoA/Spec Sheet. For typical media bases, sterile, cell-culture–grade water is used for reconstitution.
• Literature/general considerations for CHO media bases
  • Primary solvent: Cell-culture–grade water (WFI or equivalent) is standard. Avoid tap or DI water without further purification due to potential endotoxin and ionic variability.
  • Buffering system: Many CHO media rely on a bicarbonate/CO2 buffer. If the base requires NaHCO3 addition, CO2 incubator (e.g., 5%) maintains pH 7.0–7.4. Optional HEPES (10–25 mM) provides additional pH stability for open handling.
  • Miscibility/polarity: Fully aqueous. Do not mix with organic solvents except for sterile stock additions of certain supplements, which should be kept below cytotoxic levels (e.g., DMSO typically ≤0.1–0.5% v/v in cultures).
  • Practical tips
    • Warm solvent (room temperature) can accelerate dissolution; avoid excessive heat that may degrade thermolabile components.
    • Add powder gradually under vigorous but non-aerating stirring to prevent clumping. Verify complete dissolution before pH/osmolality adjustments and sterile filtration (if prepared from powder).
  • Comparison (general)
    • Bicarbonate/CO2-only systems: Simple, economical, require CO2 control.
    • HEPES-supplemented systems: Better buffering during manipulation outside CO2 but add cost and potential phototoxicity under high light exposure.

Storage and Reconstitution

• Item-specific (Product Data)
  • Storage conditions: Room temperature.
  • Shipped in: Normal conditions.
  • Reconstitution specifics (volumes, order of addition, required supplements): Not specified for this item; refer to CoA/Spec Sheet.
• Literature/general guidance (not item specifications)
  • Storage
    • Powders: Keep tightly sealed at room temperature in a dry place with low humidity. Protect from moisture uptake and light. Use desiccant where appropriate.
    • Liquids: If supplied ready-to-use and sterile, store as instructed on label (often 2–8°C); avoid freeze–thaw unless explicitly allowed. For this SKU, only room-temperature storage is specified; consult label for exact instructions upon receipt.
  • Reconstitution (if powder)
    • Use sterile, cell-culture–grade water. Add powder gradually with strong, non-aerating mixing. Bring to final volume after dissolution. Add any required bicarbonate and supplements (e.g., glutamine) per specification. Filter sterilize (0.22 µm) into sterile containers.
    • Protect from light to preserve light-sensitive vitamins; avoid excessive heat.
  • In-use handling: Work aseptically. Pre-equilibrate in CO2 incubator if bicarbonate-buffered. Label with preparation date and lot. Dispose of spent media according to institutional biosafety procedures.
  • Shelf life: Lot-specific and formulation-dependent; Not specified for this item. Refer to CoA/Spec Sheet.

Structure and Identity

• Item-specific (Product Data)
  • Product type: CHO Medium Base (complex, multi-component cell culture medium base)
  • CAS: Not specified for this item; refer to CoA/Spec Sheet.
  • 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 / InChI / InChIKey: Not applicable to complex mixtures; not specified for this item; refer to CoA/Spec Sheet.
• Literature/general description
  • Composition nature: Typically a defined or semi-defined blend of inorganic salts (e.g., Na+, K+, Ca2+, Mg2+, Cl−, HPO4 2−/H2PO4 −), amino acids, vitamins, trace elements, energy/carbon sources (e.g., glucose), and buffering components (e.g., bicarbonate; sometimes HEPES added separately). May be protein-free and animal-component-free depending on formulation.
  • Structural features: As a mixture, there is no single structure. The “2D structure” can be conceptualized as a multicomponent ionic/organic matrix designed to mimic physiological extracellular milieu for Chinese Hamster Ovary (CHO) cells.
  • Functional role: Provides essential nutrients and osmolytes, maintains ionic strength and pH buffering capacity for mammalian cell culture. Often serves as the basal component to which supplements (lipids, insulin/transferrin/selenium, hypoxanthine/thymidine, glutamine or stable dipeptides) are added according to process requirements.
  • Format: Commercial CHO media bases are supplied as dehydrated powders or as sterile liquids; exact format for this SKU is not specified here (see CoA/Spec Sheet).

Synthetic Utility

This product is a biological cell culture medium base and is not typically used as a reagent or building block in synthetic organic or inorganic chemistry. Consequently, conventional synthetic utility discussions (functional group transformations, named reactions, retrosynthesis) do not apply. For practical laboratory relevance, please refer instead to the sections on Solvent Selection, Reaction & Applications (bioprocess context), Buffer Applications, and Storage & Reconstitution for guidance on preparing and using the medium in cell culture workflows.

Target Specificity

Not applicable. This product is a cell culture medium base and does not possess target specificity parameters such as antigen, epitope, clone, isotype, or species reactivity. No item-specific immunological targeting details are provided or expected for this category.