Diff-Quik Stain (Fixative-Free) - BioReagent,Bioactive,for microscopy

Cat. No.: D1511557

QUALITÄT & REINHEIT Bioactive, BioReagent, for Microscopy

Synonyms

Diff-Quik Stain | Diff Stain

Storage

Protected from light,Room temperature

Shipped In

Normal

Application

Cell Staining, Hematologic staining

Übersicht

Diff-Quik staining is a rapid staining method developed and improved on the basis of Wright staining. It is commonly used for staining in cytological examinations. The staining solution is formulated according to the rapid staining method recommended by the World Health Organization (WHO). Similar to Wright Stain, it is modified based on the technical principle of Romanowsky Stain, and its staining results are also highly similar to those of Wright staining solution. However, Diff-Quik rapid staining requires a very short time, and staining can generally be completed within 90 seconds.

Diff-Quik Stain does not contain fixative solution. It is mainly used for staining blood smears, bone marrow smears, vaginal secretion smears, exfoliative cell smears, etc. It is very suitable for batch dip staining, with a clear background and no sediment. This staining solution is for research use only and is not suitable for clinical diagnosis or other purposes.

Product Components and Storage Conditions:

D1511557	Component	2×100mL	2×500mL	Storage
D1511557A	Diff-QuikⅠ	100mL	500mL	RT. Store in the dark.
D1511557B	Diff-QuikⅡ	100mL	500mL	RT. Store in the dark.

Protocol (For Reference Only):

1. Prepare blood smears or bone marrow smears using routine methods. Allow to air-dry or briefly pass over an alcohol lamp flame, then fix with methanol for 20–30 seconds.

2. Stain in Diff‑Quik Stain Solution I for 5–10 seconds.

3. Stain in Diff‑Quik Stain Solution II for 5–10 seconds.

4. Rinse with water and examine immediately under a microscope while wet.

5. Clear valuable slides with xylene, mount and preserve with neutral balsam.

Staining Results:

Nuclei, leukocytes: Dark blue

Matrix, lymphocytes: Purple

Cytoplasm, erythrocytes: Pink

Precautions: 

1. Blood or bone marrow smears should be of uniform thickness to avoid affecting staining results.

2. Staining of blood cell smears requires fresh whole blood or EDTA anticoagulated blood.

3. For bone marrow smears, shake or fan rapidly in air after preparation to prevent cell shrinkage, deformation or hemolysis due to high humidity. Do not dry smears with high heat or open flame.

4. For vaginal discharge smears, fix fresh specimens promptly by flame or alcohol after smearing to prevent cell deformation.

5. If staining is too intense or too faint, adjust staining time or working solution concentration accordingly.

6. pH affects staining; slides must be clean and free of acid or alkali contamination.

7. For your safety and health, wear a lab coat and disposable gloves during operation.

8. This product is for research use only, strictly prohibited for other purposes.

Spezifikationen

Synonyme

Diff-Quik Stain | Diff Stain

Spezifikationen & Reinheit

BioReagent,Bioactive,for microscopy

Stabilität und Lagerung

Store at room temperature long term (12 months). Store in the dark.

Storage

Protected from light,Room temperature

Verschickt in

Normal

Note

Bioactive, BioReagent, für die Mikroskopie

Product Line

Biologische Produkte

Application Protocols

The following is a general research protocol for rapid Romanowsky-type staining using fixative-free solutions. Item-specific validated protocols are not provided; adjust empirically and consult the product label/CoA.

• Materials:
  • Air-dried smear or cytospin slide
  • Fixative of choice (optional; user-supplied, e.g., ethanol) compatible with research goals
  • Diff-Quik Stain (Fixative-Free) solutions
  • DI water or PBS for rinsing
  • Coplin jars or staining dishes
• Procedure (example workflow):
  1. If using fixation, immerse slide in fixative for 30–120 s; air-dry completely.
  2. Immerse in solution 1 (cationic component) with 5–10 gentle dips or 10–30 s static soak.
  3. Drain briefly; transfer to solution 2 (anionic component) with 5–10 gentle dips or 10–30 s static soak.
  4. Rinse gently with DI water until runoff is nearly colorless.
  5. Air-dry upright; mount with coverslip if desired.
• Notes and optimization:
  • Adjust dip counts/exposure to achieve desired nuclear/cytoplasmic contrast.
  • Maintain clean solutions; filter if precipitates appear.
  • Use consistent water quality to minimize slide-to-slide variability.
• Controls:
  • Include a reference smear to standardize color balance across sessions and lots.

Safety: Wear appropriate PPE and protect surfaces from dye staining. Refer to SDS for hazards.

Biological Roles

This product functions as a staining reagent; it does not play a physiological role. The following describes how typical Romanowsky-type components interact with biomolecules to generate contrast (general literature):

• Cationic thiazine dyes preferentially bind to polyanionic substrates such as nucleic acids and ribosomes, producing basophilic coloration of nuclei and RNA-rich cytoplasm.
• Anionic xanthene dyes associate with basic proteins and eosinophilic granule constituents, imparting pink-red tones to cytoplasm and specific granules.
• The combined effect yields characteristic purple chromatin and differential granule staining used to distinguish cell types in hematology and cytology research.
• Staining intensity depends on ionic strength, pH, and fixation history, which modulate dye ionization and tissue permeability.

Item-specific biochemical composition or exact dye identities: Not specified for this item; refer to CoA/Spec Sheet.

Note: All uses are for research microscopy only. No claims are made regarding diagnostic performance or clinical suitability.

Buffer Applications

This product is not a buffering reagent. However, buffer conditions can influence staining outcomes.

• Rinse/processing media (general guidance):
  • Use neutral, low-ionic-strength water or buffer for rinsing to maintain consistent dye ionization states. PBS or similar buffers are commonly used, provided they do not precipitate components.
  • Avoid hard water; if present, use deionized water to reduce background and precipitates.
• pH considerations:
  • Romanowsky stains typically rely on mildly buffered conditions; deviations can shift color balance (e.g., nuclei bluer at higher pH). Exact pH specifications for this item are not provided; refer to CoA/Spec Sheet.

If buffer optimization is required, perform a small pilot series varying rinse medium and pH to establish reproducible color balance for the specimen type.

Green Alternatives

• Sustainability context:
  • Fixative-free formulations reduce or eliminate mandatory handling of methanol fixatives present in some traditional kits, which can lower volatile organic compound (VOC) exposure and flammable solvent waste in the lab.
• Greener practice suggestions (general):
  • Use closed staining jars or Coplin jars to minimize evaporative loss and aerosolization.
  • Optimize dip counts/exposure to minimize reagent consumption while maintaining image quality.
  • Segregate and reuse working solutions when appropriate, tracking performance with control slides to extend bath life.
  • Employ deionized water for rinses to avoid repeating stains due to hard water artifacts, reducing waste.
• Comparison (general, literature-based):
  • Methanol-fixed, three-solution Romanowsky kits: Simple workflow but higher flammable solvent use and VOCs.
  • Fixative-free Romanowsky kits: Permit alcohol-free workflows on air-dried smears or user-selected low-toxicity fixatives (e.g., ethanol) where compatible with research objectives.
• Waste management:
  • Collect spent dye solutions as aqueous organic dye waste; avoid discharge to drains unless permitted by local regulation.
  • Label containers clearly; shield from light to maintain bath stability and reduce premature disposal.
• Trade-offs:
  • Fixative-free systems may require more upfront method development to match contrast achieved by predefined methanol-fixed protocols.

Pharmaceutical Uses

Not typically applicable. Diff-Quik Stain (Fixative-Free) is a research staining reagent for microscopy and is not used as a pharmaceutical active ingredient or standard excipient.

• Formulation role: None in drug products.
• Pharmacopeial status: Not specified for this item; refer to CoA/Spec Sheet.

Relevance to pharmaceutical labs (research/manufacturing context):

• May be used in non-GMP research settings for morphological assessment of cell cultures or process development samples to support in-house investigations.
• For any regulated use, qualification and validation of staining protocols, solution identity, and performance characteristics would be required; such validation is outside the scope of this product description.

Research Use Note: For research use only.

Physical Properties

As a formulated staining mixture, classical single-compound physicochemical constants are not applicable.

• Appearance: Not specified for this item; refer to CoA/Spec Sheet.
• Density, refractive index: Not specified for this item; refer to CoA/Spec Sheet.
• pH: Not specified for this item; refer to CoA/Spec Sheet.
• Solvent system: Not specified for this item; refer to CoA/Spec Sheet.
• Boiling point / melting point: Not applicable for a prepared aqueous/solvent solution; specific values not specified for this item; refer to CoA/Spec Sheet.
• Solubility: Provided as a ready-to-use solution; additional solubility data not specified for this item; refer to CoA/Spec Sheet.

General literature context (for understanding only):

• Romanowsky-type staining solutions are typically water-miscible and buffered to maintain dye ionization states that yield differential staining of nuclei (basophilic, blue-purple) and cytoplasm/granules (eosinophilic, pink to red).
• Fixative-free systems are commonly designed for direct use on air-dried smears or on specimens pre-fixed by the user (e.g., alcohols or crosslinking fixatives chosen per application). Exact parameters for this item are not specified; consult the product label/CoA.

Quality and Grades

• Item-specific grade: Bioactive, BioReagent, for Microscopy.
  • BioReagent (general meaning): Indicates suitability for research use with controlled impurities appropriate for biochemical and cell/molecular workflows.
  • For Microscopy: Prepared and quality-checked to deliver consistent staining contrast and low background under brightfield microscopy.
  • Bioactive (context for dyes): Chromophores that interact with biomolecules to yield contrast; not an indication of therapeutic activity.
• What this means in practice:
  • Batch-to-batch consistency of color balance is critical for cytological interpretation in research; microscopy-grade products target reproducible hue and intensity across lots.
  • Light protection in manufacturing/packaging helps limit photodegradation and spectral drift.
• Item-specific specifications (limits, stabilizers, UV cutoff, metal content): Not specified for this item; refer to CoA/Spec Sheet.
• Verification suggestions:
  • Researchers often verify performance by staining a standard reference smear (e.g., a control blood smear) to compare hues and granule contrast across lots.
  • If quantitative image analysis is intended, calibrate white balance and illumination settings and document dwell times to ensure comparability between experiments.
• Compliance note: For research use only (as stated). Not intended for diagnostic or clinical use.

Reaction and Applications

Chemical reaction use is not the focus; this product is a research staining reagent for microscopy.

Research applications (general literature for Diff-Quik-type stains):

• Rapid Romanowsky-style staining of air-dried blood smears, bone marrow cytology preparations, and cytospin samples to visualize cellular morphology, nuclear detail, and cytoplasmic granules.
• Staining of microorganisms in smears (e.g., general survey of bacteria, yeast) to enhance contrast for morphological assessment in research settings.
• Quality control slides in hematology research for instrument validation and training.

Practical considerations:

• Fixation: As a fixative-free formulation, specimens should be air-dried or pre-fixed using a method chosen by the researcher (e.g., alcohols) before staining, depending on the specimen and experimental aim.
• Timing and agitation influence hue: Shorter exposure favors lighter tones; extended exposure increases saturation and metachromasia from thiazine components.
• Rinse quality: Gentle, consistent rinses prevent precipitate artifacts and preserve cytoplasmic texture.
• Documentation: Record dip counts/exposure times, rinse medium, and any pH/ionic strength adjustments to ensure reproducibility across experiments.

Item-specific validated applications from the manufacturer: Not specified for this item; refer to CoA/Spec Sheet.

Reaction Conditions

Chemical reaction conditions are not applicable. The relevant “conditions” pertain to staining parameters. The following are general literature guidelines for Romanowsky-type rapid stains; adjust to specimen and microscope setup. Item-specific validated conditions are not provided for this product.

• Specimen preparation: Air-dry smears thoroughly. If fixation is desired, select and apply a fixative compatible with your research (e.g., alcohol-based); allow to dry.
• Staining sequence (typical rapid protocol concept):
  • Immerse in cationic dye solution for short, controlled exposures.
  • Transfer to anionic dye solution for contrast.
  • Rinse gently with water or buffer to remove excess dye.
• Timing: Total immersion often completed within 1–3 minutes in rapid methods; optimize by running a time course on control slides.
• Agitation: Gentle dipping promotes uniform coverage while minimizing precipitate formation.
• Drying: Air-dry vertically to avoid pooling and dye edge artifacts.
• Troubleshooting (general):
  • Pale staining: Increase exposure times or confirm fixation adequacy.
  • Excess background: Improve rinsing quality, verify water purity, or shorten exposure.
  • Precipitates: Filter working solutions and use clean glassware.

Note: Exact step times, concentrations, and sequences for this item are not specified; refer to CoA/Spec Sheet and perform in-house optimization.

Safety and Handling

• GHS classification, hazard statements, pictograms, and signal word: Not specified for this item; refer to SDS.
• General laboratory precautions (good practice):
  • Wear appropriate PPE: lab coat, safety glasses, and chemical-resistant gloves. Avoid skin and eye contact; dyes can cause persistent staining of skin and surfaces.
  • Use in a well-ventilated area. Avoid ingestion and inhalation of aerosols or mists; do not pipette by mouth.
  • Protect from light as specified to preserve dye integrity and performance.
• Incompatibilities (general): Strong oxidizers and strong reducing agents may degrade organic dyes; avoid mixing with incompatible chemicals unless validated.
• First-aid overview (general guidance; defer to SDS):
  • Skin contact: Immediately wash with soap and water; remove contaminated clothing.
  • Eye contact: Rinse cautiously with water for several minutes; remove contact lenses if present and easy to do; continue rinsing. Seek medical evaluation as needed.
  • Inhalation: Move to fresh air; seek medical attention if symptoms persist.
  • Ingestion: Rinse mouth; do not induce vomiting; seek medical attention.
• Spill/cleanup: Absorb with inert material, avoid spreading stains; collect waste in a properly labeled container for disposal.
• Waste: Dispose according to institutional and local regulations for aqueous dye-containing laboratory waste.
• Always consult the product SDS for authoritative safety data and emergency measures.

Solvent Selection

This product is itself a staining solution rather than a solvent to select for synthesis. However, solvent compatibility influences staining quality.

• Compatibility (general):
  • Water and common biological buffers (e.g., PBS) are typically used for rinsing and intermediate steps. Exact recommendations for this item are not specified; refer to product label/CoA.
  • Alcohols (methanol/ethanol) are often used by researchers for pre-fixation (external to this fixative-free product). Choice affects chromatin condensation and cytoplasmic permeability.
• When to choose a fixative-free system:
  • Useful when users require control over fixation chemistry (e.g., alcohol fixation vs. crosslinkers) or when working with air-dried cytology/blood smears.
• Practical tips (general literature):
  • Use freshly prepared, clean water or buffer for rinses; elevated ionic strength and pH drift can shift dye ionization and color balance.
  • Avoid hard water; divalent cations can influence precipitates/background. If needed, use deionized water.
• Quick comparison (general):
  • Fixative-included kits: Simplify workflow, but impose a fixed methanolic fixation step.
  • Fixative-free kits: Greater flexibility for specimen-specific fixation, reduced handling of methanol, and potential alignment with institutional solvent policies.

Storage and Reconstitution

• Storage conditions (item-specific):
  • Protected from light, Room temperature
  • Shipped: Normal
• Reconstitution: Not specified for this item; refer to CoA/Spec Sheet. Many rapid stain systems are delivered ready-to-use; if concentrates are supplied, follow the label for dilution with the specified solvent/buffer.
• Container handling:
  • Keep tightly closed to limit evaporation and contamination.
  • Minimize light exposure during use (e.g., amber glassware or closed staining jars) to preserve dye integrity.
• Stability/shelf life: Not specified for this item; refer to CoA/Spec Sheet.
• Freeze–thaw guidance: Not applicable; do not freeze unless explicitly directed by the manufacturer. Freezing may cause dye precipitation or component separation.
• In-use practices:
  • Track cumulative use and replace solutions when color balance drifts or background increases, using a control slide as a benchmark.
  • Avoid returning used aliquots to the stock container; dedicate working baths to reduce contamination risk.
• Research Use Note: For research use only.

Structure and Identity

Diff-Quik Stain (Fixative-Free) is a formulated staining reagent system; it is a mixture and does not correspond to a single molecular structure.

• Item-specific identifiers:
  • 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: Not applicable (mixture)
  • InChIKey: Not applicable (mixture)
• Composition note (literature/general): Diff-Quik-type stains are commonly Romanowsky-style, employing an anionic dye (e.g., eosin Y) and a cationic thiazine dye (e.g., azure B/methylene blue) in buffered/aqueous or alcohol-containing solutions. The fixative-free format omits the methanolic fixative step supplied in some kits.
• Structural features (general):
  • Anionic xanthene dye component (eosin-like) binds to basic/acidophilic cellular proteins.
  • Cationic thiazine dye component (azure/methylene blue-like) binds to nucleic acids and acidic components.
• 2D structure description (general): Each component dye is aromatic with ionic substituents; the mixture contains at least one cationic chromophore and one anionic chromophore to deliver Romanowsky contrast. Exact structures and ratios are not specified for this item; refer to CoA/Spec Sheet.

Synthetic Utility

Not applicable as a building block or reagent for chemical synthesis. This product is a formulated staining solution for microscopy.

For users seeking dye components for synthetic derivatization or analytical probe development, individual pure dyes (e.g., eosin derivatives, thiazine dyes) should be sourced as discrete chemicals with specified structures and purities. Such components allow control over stoichiometry and chemical reactivity that a ready-to-use staining mixture does not provide.

Target Specificity

This section typically applies to antibodies or affinity reagents. It is not directly applicable to a general staining mixture.

General staining affinity (literature context):

• Cationic components preferentially bind nucleic acids and other acidic cellular constituents (basophilia), enhancing nuclear detail.
• Anionic components preferentially bind basic proteins in cytoplasm and certain granules (eosinophilia).

Item-specific targets, epitopes, or clone information: Not applicable.

Häufig gestellte Fragen

What does Bioactive mean?

Bioactive indicates that the product has been processed and tested for biological and biochemical applications. Specifications may include endotoxin limits, microbial controls, sterility, low DNase/RNase/protease activity, and verified biological activity where relevant.

What does BioReagent mean?

BioReagent indicates that the product has been processed and tested for biological and biochemical applications. Specifications may include endotoxin limits, microbial controls, sterility, low DNase/RNase/protease activity, and verified biological activity where relevant.

How should this product be stored?

Store at room temperature, protected from light. The material is light-sensitive — keep it in its original opaque or amber container.

How is this product shipped?

This product ships under standard ambient conditions. No temperature-controlled packaging is required.

What documentation is provided?

Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.