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Methylene Chloride and N-Methyl-Pyrrolidone Replacement Options

There are a number of recent articles regarding Methylene Chloride and N-Methyl-Pyrrolidone (NMP) bans in paint strippers from both Lowes and Sherwin Williams. It is likely there will be more coming shortly. As a result many manufacturers have approached Holland asking for potential replacements for these two raw materials.

Methylene Chloride can be easily formulated out using Methylal and or Dioxolane. Both of these products have high solvency power, low viscosity, and significant water solubility (Dioxolane is fully miscible).  Methylal and Dioxolane have a very similar molecular weight, but Dioxolane has a ring structure, significantly increasing its flash point. Both products have excellent Health and Atmospheric Chemistry profiles.

TOU has nearly identical physical properties to NMP.  The solvency power (Kb) is >200 and the vapor pressure profile is the same (see below). TOU has none of the health concerns that are associated with NMP.

All these products are TSCA approved and are NOT listed on the California Prop 65 list. 

At Holland, we have been working with Methylal, Dioxolane, TOU, and many other members of the Acetal family for over 20 years. Please call us to discuss your needs as you formulate through these changes.

Chart of TOU vs. NMP Vapor Pressure Curves showing kPA on the y-axis and T(k) on the x-axis, showing curves labeled TOU and NMP that are very similar.