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English
Views: 0 Author: Site Editor Publish Time: 2026-06-26 Origin: Site
Dichloromethane (DCM, CAS 75-09-2) is one of the most widely used chlorinated solvents globally. Its low boiling point, high density, moderate solubility parameters, and good chemical inertness have secured it an irreplaceable position in coatings, cleaning, polyurethane, pharmaceutical intermediates, and chemical synthesis.
We supply industrial-grade dichloromethane across multiple specifications, from general-purpose to refined grades, suitable for paint stripping, foaming, extraction, cleaning, viscosity adjustment, and other typical industrial applications. Unlike the laboratory setting where "high purity alone" suffices, industrial users impose far more stringent combined requirements on stability, batch-to-batch consistency, evaporation rate, and overall cost — this is the core starting point of our product system design.
Understanding the process suitability of dichloromethane requires examining several key physical properties.
Density (1.325 g/cm³)
Significantly higher than water, enabling the formation of a clear phase separation interface in liquid-liquid extraction systems, facilitating rapid transfer and recovery of target compounds. For chemical and pharmaceutical intermediate production, this property directly impacts yield and operational efficiency.
Solubility Parameter (δ ≈ 9.7 (cal/cm³)^(1/2))
Falling in the moderate polarity range, it exhibits good solubility for most oils, resins, waxes, polymers, and organic compounds. Specific application values include: rapid penetration and swelling of coatings in paint strippers, adjustment of solid content and rheology in adhesive systems, and removal of stubborn contaminants in precision cleaning.
Low Surface Tension
Imparts excellent wetting and penetrating properties, enabling effective coverage of blind holes and crevices when cleaning or coating workpieces with complex geometries, minimizing dead-angle residues.
Coatings and Paint Stripping
In the shipbuilding, automotive, furniture, and metalworking industries, dichloromethane is the core active component of traditional paint strippers. Its mechanism of action involves rapid penetration into coating micro-cracks, swelling of crosslinked networks, and disruption of the adhesion interface, achieving coating removal with efficiency significantly superior to mechanical sanding or thermal ablation processes. Our products strictly control moisture and acidity indicators to prevent corrosion or flash rusting of substrates during application.
Polyurethane Foaming
As a physical blowing agent, dichloromethane plays a critical role in the production of flexible and semi-rigid polyurethane foam. Its low boiling point ensures rapid vaporization during the exothermic polymerization stage, forming a uniform and fine cell structure. Boiling point consistency directly affects expansion ratio and cell morphology. We rigorously test the boiling range of each batch to ensure stable reproduction of user process parameters.
Industrial Cleaning and Degreasing
Dichloromethane exhibits excellent dissolution and removal capability for mineral oils, cutting fluids, stamping oils, and flux residues, and is widely used in precision cleaning of metal parts, electronic components, and optical components. Its non-flammable nature (at ambient temperature) provides a relatively safe operating environment for cleaning operations, while its rapid evaporation eliminates the need for secondary drying steps.
Adhesives and Coatings Manufacturing
In solvent-based adhesive and coating formulations, dichloromethane serves as an active solvent or diluent for adjusting system viscosity, improving leveling properties, and extending open time. Its moderate solvency and evaporation profile help avoid surface defects such as orange peel and cratering during film formation.
Chemical Synthesis and Extraction
In pharmaceutical and fine chemical industries, dichloromethane is commonly used as a reaction medium or extraction solvent. Its chemical inertness enables compatibility with various reaction conditions, while its low boiling point simplifies post-treatment distillation and recovery processes, reducing the risk of solvent residues.
The pain point for industrial users is often not "availability" but "batch-to-batch consistency." Our quality control system focuses on the following dimensions:
Purity and Impurity Limits
Gas chromatography is employed for batch-by-batch testing of main content and key impurities (including water, acidity, non-volatile matter, and chlorides). For sensitive applications, additional special testing data for metal ions and specific organic residues can be provided.
Evaporation Rate and Boiling Range
Ensuring boiling range fluctuation is controlled within ±0.5°C per batch to prevent drift in evaporation-curve-dependent processes such as foaming and drying.
Moisture Control
Moisture content is strictly controlled to avoid side reactions or corrosion issues in polyurethane systems and metal cleaning applications.
Batch Traceability and Retention Samples
Retention samples are preserved for each batch to ensure traceability in the event of quality issues, with clear delineation of accountability.
Industrial hygiene and safety management of dichloromethane are prerequisites for compliant operations.
Exposure Control
Current occupational exposure limits are becoming increasingly stringent. The US EPA has reduced the 8-hour TWA limit to 2 ppm in 2024, significantly lower than OSHA's 25 ppm standard. This requires users to establish comprehensive local exhaust ventilation systems, and real-time gas monitoring devices are recommended.
Personal Protective Equipment
Dichloromethane exhibits rapid permeation through standard nitrile gloves and is not recommended as the sole barrier protection. Butyl rubber, polyvinyl alcohol, or multi-layer composite gloves are recommended, with regular replacement. Chemical splash goggles and face shields should also be provided to prevent splashes from entering the eyes.
Storage Conditions
Recommended storage in cool, dry, well-ventilated dedicated warehouses, away from ignition sources, heat sources, and incompatible materials such as strong oxidizers and reactive metals. Containers should remain tightly sealed to avoid moisture absorption and vapor escape.
Spill Response
Small spills may be covered and absorbed using inert adsorbent materials (sand, vermiculite), collected in sealed containers, and handed over to professional disposal agencies. Large spills require activation of emergency response plans, cutting off ignition and power sources, constructing dikes or excavation containment to prevent entry into sewers and water bodies.
Specifications and Packaging
Available in multiple specifications including industrial grade, refined grade, and high-purity grade. Packaging options include 25 L pails, 200 L closed-head steel drums, 1000 L IBC totes, and bulk tanker delivery, accommodating warehousing and feeding methods for users of varying scales.
Documentation Support
Batch COA, SDS, transport identification reports, and compliance declarations are provided with each shipment, fully supporting procurement receiving, EHS inspections, and export customs clearance procedures.
Technical Support
For specific customer process requirements, extended services are available including solvent selection recommendations, alternative solution assessments, and feasibility analysis for solvent recovery and reuse.
Contact Information
For further product specifications, sample requests, or current pricing, please contact our sales team. We will provide tailored supply solutions based on your specific application, average monthly consumption, and packaging preferences.
Stable supply stems from sustained quality control. The margin for error in industrial production is limited — we aim to deliver zero deviation for you in the solvent link.
