Methylene Blue Staining Solution
FluxMPS™ Methylene Blue Staining Solution
An MPS-grade, ready-to-use 1% (w/v) methylene blue chloride staining solution formulated to pH 6.0–7.5 for consistent nuclear, cytoplasmic, and bacterial morphology visualization. Manufactured with quadruple-stage 0.1 µm and 0.04 µm membrane filtration for a mycoplasma-safe, low-particulate reagent suited to microbiology, histology, molecular biology, and microfluidic / organ-on-a-chip (OoC) workflows.
- Quadruple-stage filtration: 0.1 µm membrane filtration twice and 0.04 µm membrane filtration twice for ultra-clean, mycoplasma-safe reagent quality
- Sterile, Ultrapure formulation — among the cleanest reagents available for cell and molecular biology experiments
- 1% (w/v) methylene blue chloride (C16H18ClN3S · xH2O), buffered to pH 6.0–7.5 for compatibility with biological specimens
- ≥99% purity of the active methylene blue component with batch-to-batch consistency
- Selective binding to negatively charged cellular components enables high-contrast nuclear, cytoplasmic, and bacterial morphology visualization
- Manufactured in ISO 13485-certified, CE-approved facilities with final QA and testing at the DiagnoCine R&D and Quality Testing Center
- Compatible with Gram staining, acid-fast bacilli (AFB) staining, viability assays, and nucleic acid gel / blot visualization
- Customization available: alternate concentrations, pH, or additive formulations on request
- Format500 mL, Ready-to-Use Solution
- Active Component1% (w/v) Methylene Blue Chloride
- Molecular Weight319.85 g/mol
- pH6.0–7.5
- Purity≥99% (active component)
- Density~1.00 g/cm³
- Filtration0.1 µm x2 + 0.04 µm x2 (Quadruple-stage)
- SterilitySterile (filter-sterilized)
- StorageRoom temperature, protected from light
- Shelf Life24 months
Engineered where standard staining reagents fail
Conventional 0.22 µm-filtered staining reagents can carry subvisible particulates and mycoplasma-scale bioburden that accumulate in microchannels, elevate imaging background, and compromise reproducibility. FluxMPS™ Methylene Blue Staining Solution is built to remove those failure modes at the source.
Microchannel-safe purity
Final 0.04 µm pore-size filtration reduces particulate load beyond a single 0.22 µm pass, supporting microfluidic and organ-on-a-chip compatibility.
Precise, stable pH
Formulated to pH 6.0–7.5 for consistent, reproducible binding to negatively charged cellular components across staining protocols.
Ultrapure-grade water
Prepared with Ultrapure Type 1 water (18.2 MΩ·cm) consistent with USP <85> quality practices.
Low background for imaging & assays
High-contrast, low-background staining supports brightfield microscopy, oil-immersion bacteriology, and nucleic acid visualization on gels and blots.
Defined, traceable composition
Single active-component formulation (methylene blue chloride, ≥99% purity) with lot-level DNase / RNase testing for traceable quality.
Customization on demand
Alternate concentrations, pH, or additions of chemicals, compounds, proteins, or supplements available on inquiry.
Quadruple-stage filtration system
DCP-MB1X is filtered through a 0.1 µm membrane twice and a 0.04 µm membrane twice, a four-pass architecture designed to prevent mycoplasma contamination and minimize particulate carryover in the finished staining solution.
- 1
0.1 µm Pre-filtration I
First-pass removal of large particulates and aggregates, extending the service life of downstream filters.
- 2
0.04 µm Pre-filtration II
Retention of fine particulates and bioburden ahead of final sterile filtration.
- 3
0.1 µm Sterile-filtration I
Second-pass redundancy through a 0.1 µm membrane for consistent sterile filtration.
- 4
0.04 µm Sterile-filtration II — Final Polish
Final 0.04 µm polish under ISO Class 5 (Class 100) fill conditions helps prevent mycoplasma contamination; the smallest mycoplasma species measure approximately 0.2 micron.
Performance vs. conventional buffer
Sequential 0.1 µm (x2) and 0.04 µm (x2) filtration removes finer particulates than a single 0.22 µm pass, supporting a mycoplasma-safe, low-background staining reagent for microscopy, molecular biology, and microfluidic workflows.
© Diagnocine® — DCP-MB1X
Where DCP-MB1X performs
A single, well-characterized 1% (w/v) methylene blue chloride formulation supporting microbiology, histology, cytology, and molecular biology staining protocols.
Automated Bioreactors & Robotics
For automated staining platforms and robotic liquid handlers, an optional 0.01 µm (10 nm) ultra-filtered variant is available on request to further reduce particulate load in automated fluidic paths.
- Total Particulate Exclusion: Finer polishing minimizes particulate carryover into automated dispensing lines.
- Valve & Sensor Protection: Reduced particulate load helps protect microvalves and optical sensors in automated staining systems.
- Extended Perfusion Stability: Lower particulate burden supports stable operation in continuous-flow and perfusion-based platforms.
Inquiry Required: The 0.01 µm (10 nm) ultra-filtered grade is available by request — contact support@diagnocine.com.
Gram Staining Counterstain
Serves as a counterstain in modified Gram protocols, differentiating Gram-negative bacteria through selective retention after decolorization.
Capsule Visualization
Highlights polysaccharide capsules as unstained halos around blue-stained bacterial cells via negative staining techniques.
Viability Assays
Distinguishes live/dead yeast and microbial cultures through redox activity — viable cells reduce the dye to colorless leukomethylene blue.
Nuclear Staining
Intensely stains nuclei dark blue while lightly coloring cytoplasm, ideal for peripheral blood smears and tissue sections.
AFB & Leprosy Diagnostics
Optimized for Ziehl-Neelsen acid-fast bacilli (AFB) staining and Fite's modified AFB protocols for leprosy diagnostics.
Nucleic Acid Detection & Metachromatic Analysis
Visualizes RNA/DNA in northern/Southern blots and agarose gels without interfering with membrane hybridization; exhibits concentration-dependent spectral shifts (λmax 664 nm monomeric, 605 nm dimeric).
Recommended Staining Protocol
- Specimen preparation: apply 10–20 µL of liquid samples directly to a clean glass slide, or prepare thin tissue sections (4–6 µm) using a microtome; air-dry completely, and heat-fix bacterial smears (except for capsule staining).
- Staining: flood slides with the 1% (w/v) solution for 2–3 minutes; for enhanced nuclear contrast, alkalinize with 1% KOH (Löffler's method) and age the solution 7 days before use.
- Post-staining: rinse gently with distilled water (30 sec) to remove excess dye, then blot dry with filter paper or air-dry vertically.
- Microscopy: observe under oil immersion (1000x) for bacterial morphology or brightfield microscopy (400x) for eukaryotic cells.
Physical, chemical, and quality parameters
All values below are sourced from the product's own formulation and quality-control record.
| Parameter | Specification |
|---|---|
| Formulation / Composition | 1% (w/v) Methylene Blue Chloride (C16H18ClN3S · xH2O) aqueous solution |
| Appearance | Dark blue solution |
| Molecular Weight | 319.85 g/mol |
| pH (USP <791>) | 6.0–7.5 |
| Density | ~1.00 g/cm³ |
| Purity (active component) | ≥99% |
| Absorption Maxima | λmax 664 nm (monomeric), 605 nm (dimeric) |
| Parameter | Specification |
|---|---|
| Filtration System USP <788> | 0.1 µm membrane filtration twice and 0.04 µm membrane filtration twice |
| Sterility | Sterile (filter-sterilized) |
| DNase Activity | None detected (18 hr incubation with plasmid DNA, room temperature) |
| RNase Activity | None detected (18 hr incubation with ribosomal RNA, room temperature) |
| Water Purity USP <85> | Ultrapure Type 1 water (18.2 MΩ·cm) |
| Manufacturing Standard ISO 13485 | ISO 13485-certified, CE-approved facility |
| Fill Environment | ISO Class 5 (Class 100) |
| Parameter | Specification |
|---|---|
| Storage Temperature | Room temperature, away from bright light |
| Shelf Life | 24 months |
| Special Handling Note | Optional 7-day aging after 1% KOH alkalinization (Löffler's method) for enhanced nuclear contrast |
| Parameter | Specification |
|---|---|
| Raw Material Grade | Methylene Blue Chloride, ≥99% purity (active component) |
| Manufacturing QMS ISO 13485 | ISO 13485-certified facility (DiagnoCine Precision) |
| Regulatory Alignment | CE-approved manufacturing; final QA and testing at the DiagnoCine R&D and Quality Testing Center |
| Production Method | 0.1 µm membrane filtration twice and 0.04 µm membrane filtration twice; custom assembly performed at DiagnoCine Precision, Totowa, New Jersey, USA |
| Intended Use | Research Use Only (RUO) |
Full composition
Single active-component formulation, released per lot against the specification below.
| Component | CAS Number | Concentration |
|---|---|---|
| Methylene Blue Chloride | 61-73-4 | 1% |
Manufacturing & compliance
Manufactured, packaged, and quality-tested under a controlled quality management system.
ISO 13485:2016 QMS
Manufactured under ISO 13485-certified and CE-approved facilities (DiagnoCine Precision).
Ultrapure Type 1 Water
Formulated with Ultrapure Type 1 water (18.2 MΩ·cm).
ISO Class 5 Fill & Finish
Final fill performed under ISO Class 5 (Class 100) conditions after quadruple-stage filtration.
Micro-Batch Precision
All specific customization requests and assembly are accomplished at DiagnoCine Precision in Totowa, New Jersey, USA.
DNase / RNase Testing
No DNase activity detected after 18 hr incubation with plasmid DNA; no RNase activity detected after 18 hr incubation with ribosomal RNA (room temperature).
Filtration System USP <788>
0.1 µm membrane filtration twice and 0.04 µm membrane filtration twice.
Safety & Handling
Nitrile gloves, lab coat, and eye protection required. Absorb spills with vermiculite and dispose of as hazardous waste. Incompatible with strong oxidizers and acids. Decontaminate equipment with 70% ethanol followed by a soap-water rinse.
Documentation / CoA
Certificate of Analysis available per lot upon request.
How DCP-MB1X compares
A side-by-side look at filtration architecture and quality assurance relative to conventional staining reagents.
| Parameter | DCP-MB1X (FluxMPS™) | Conventional (0.22 µm filtered) | Standard alternative (0.22 µm filtered) |
|---|---|---|---|
| Filtration architecture | 0.1 µm x2 + 0.04 µm x2 (Quadruple-stage) | Single 0.22 µm pass | Single 0.22 µm pass |
| Final filtration pore size | 0.04 µm | 0.22 µm | 0.22 µm |
| Number of filtration stages | 4 | 1 | 1 |
| Sterile filtration | check_circle | check_circle | check_circle |
| Mycoplasma-scale (sub-0.1 µm) filtration | check_circle | cancel | cancel |
| ISO 13485-certified manufacturing | check_circle | cancel | cancel |
| Lot-level DNase / RNase testing | check_circle | cancel | cancel |
| Custom formulation available | check_circle | cancel | cancel |
| Microfluidic / microchannel compatibility | check_circle | cancel | cancel |
Frequently asked questions
Common questions about DCP-MB1X Methylene Blue Staining Solution.
Supporting literature
Curated peer-reviewed literature relevant to methylene blue staining chemistry and applications.
- Coico R. Gram Staining. Curr Protoc Microbiol. 2005. doi:10.1002/9780471729259.mca03cs00
- Kirchner FK. Modifications of the Ziehl-Neelsen technique for acid-fast bacilli. Am J Clin Pathol. 1955. doi:10.1093/ajcp/25.10.1179
- Fite GL, Cambre PJ, Turner MH. Procedure for demonstrating lepra bacilli in paraffin sections. Am J Clin Pathol. 1947. doi:10.1093/ajcp/17.12.1020
- Wainwright M, Crossley KB. Methylene Blue - a therapeutic dye for all seasons? J Chemother. 2002. doi:10.1179/joc.2002.14.5.431
- Sabnis RW. Handbook of Biological Dyes and Stains: Synthesis and Industrial Applications. Wiley. 2010. doi:10.1002/9780470586242
- Bukhari S, et al. Metachromasia and dye aggregation phenomena of phenothiazine dyes. Dyes Pigments. 2016. doi:10.1016/j.dyepig.2015.10.019
- Bhatia SN, Ingber DE. Microfluidic organs-on-chips. Nat Biotechnol. 2014. doi:10.1038/nbt.2989
- Low LA, Tagle DA. Organs-on-chips: progress, challenges, and future directions. Exp Biol Med. 2017. doi:10.1177/1535370217700523
- Nubel U, et al. Detection of mycoplasma contamination in cell cultures. Methods Mol Biol. 2016. doi:10.1007/978-1-4939-3255-9_12
- Green MR, Sambrook J. Analysis of DNA by Agarose Gel Electrophoresis. Cold Spring Harb Protoc. 2019. doi:10.1101/pdb.top100388
