Dichloromethane 99.99 Percent for HPLC and Spectroscopy

Ultra high purity dichloromethane supplied for laboratory analytical and chromatographic use.

High-purity Dichloromethane (DCM), often rated at ≥99.9% or 99.99%, is a specialized solvent designed for sensitive analytical applications such as HPLC, Spectroscopy, and Gas Chromatography (GC). 

Key Specifications
Purity & Assay: Typically marketed as 99.99% or ≥99.9% to ensure minimal interference in baseline readings.
UV Suitability: Optimized for UV/Visible Spectroscopy, providing low background noise and high transparency at critical wavelengths (e.g., UV cutoff around 233–235 nm).
Stabilisation: Often contains small amounts (50–150 ppm) of amylene as a stabilizer to prevent the formation of phosgene and hydrochloric acid during storage.
Trace Contaminants: Includes strict limits on evaporation residue (≤0.0001%), water content (≤0.01%), and fluorescence (e.g., ≤1.0 ppb as quinine). 

Common Applications
Chromatography: Mobile phase component in HPLC and extraction solvent for GC/MS due to its volatility and low boiling point (~39.8 °C).
Spectroscopy: Used as a solvent for liquid-phase spectroscopy where high optical clarity is required.
Residue Analysis: Suitable for environmental testing and detecting pesticide residues at the parts-per-billion (ppb) level. 

Supplier Availability
Sigma-Aldrich: Offers Dichloromethane HPLC Plus (≥99.9%) suitable for HPLC, GC, and residue analysis.
Reflecta Laboratory Supplies: Provides Dichloromethane 99.99% for HPLC & Spectroscopy in 2.5L volumes.
PerkinElmer: Supplies HPLC Grade DCM specifically tested for UV suitability. 
Safety Warning: Dichloromethane is suspected of causing cancer (H351) and is subject to increasing regulatory restrictions (e.g., by the EPA) for commercial and consumer use. Always handle in a well-ventilated fume hood.