Pharma-Grade Methylene Chloride (DCM): Uses, Quality and Supply from Rotterdam

Last updated: 20 October 2026

Methylene chloride (dichloromethane, DCM) is one of the most important solvents in pharmaceutical production. It dissolves a wide range of active ingredients, does not burn and evaporates at about 40 °C, so it is easy to remove after use. For pharmaceutical work, the grade and the paperwork matter as much as the price.

Why pharma still relies on methylene chloride

Few solvents combine strong solvency, low boiling point and non-flammability the way DCM does. That makes it hard to replace in extraction, synthesis and purification steps, where solvent must be removed gently without damaging heat-sensitive active ingredients.

Because traces of solvent can remain in the final medicine, pharmaceutical manufacturers need a consistent, high-purity product with full batch documentation.

Pharmaceutical applications of DCM

• API synthesis: reaction solvent for many steps in active pharmaceutical ingredient production.
• Extraction and purification: separates active compounds from reaction mixtures and natural raw materials.
• Crystallisation: dissolves intermediates and APIs before controlled recrystallisation.
• Microencapsulation: solvent for polymers such as PLGA when making microspheres and controlled-release forms.
• Laboratory and analysis: solvent for chromatography and quality-control testing.

Pharma grade vs industrial grade

• Purity: Pharma grade ≥ 99.9% · Industrial grade ≥ 99.8%
• Impurities: Pharma grade Controlled to tighter limits · Industrial grade Standard technical limits
• Documentation: Pharma grade CoA for every batch, full traceability · Industrial grade CoA on request
• Typical use: Pharma grade API production, extraction, pharma labs · Industrial grade Degreasing, synthesis, polymers

Residual solvents: why purity matters

Under the ICH Q3C guideline, methylene chloride is a Class 2 residual solvent with a limit of 600 ppm in the final product (permitted daily exposure 6.0 mg/day). Manufacturers must show that residues stay below this limit, so they need a solvent with a known, consistent impurity profile and batch-level documentation.

Quality and compliance at Rotterdam Chemicals Group

• Pharma grade ≥ 99.9% with a Certificate of Analysis for every batch.
• GMP/GDP: handling, storage and documentation in line with GMP and GDP requirements; certificates available on request.
• Audited supplier: approved by pharmaceutical customers after supplier audits. We welcome your audit or supplier questionnaire.
• REACH registered, with SDS and TDS supplied.
• Traceability from producer to delivery for every batch.

In stock in Rotterdam

We keep pharma-grade methylene chloride in stock at our Rotterdam warehouse, so we can deliver quickly across Europe and worldwide. Packaging: 200 L drums, 1,000 L IBCs, road tankers and ISO tanks, or custom packaging on request.

Request a quote for pharma-grade MCL

Tell us the quantity, packaging, delivery location and any specification or audit requirements, and we will send you a price together with the batch documentation.

Request a pharma-grade MCL quote → · sales@rotterdamchemicals.com · +31 (0)10 450 8722

Comparing solvents? Read our overview: 5 Solvents Every Formulator Should Know.