Di Methyl Sulfoxide (DMSO)

Purity/Concentration:

High purity is often required for most applications.
 Commonly available with purity levels of 99% or higher.

Water Content:

Low water content is typically specified, often less than 0.1%.

Acidity (as HSO):

The acidity is usually specified to be low, with limits often set to less than 0.03% as sulfuric acid.

Color:

Specifications may include a maximum color limit, often measured using a standard color scale (such as APHA color).

Boiling Range:

The boiling range may be specified to ensure a consistent product.

Impurities:

Limits on impurities, such as heavy metals, peroxides, and other contaminants, are often included in specifications.

Flash Point:

DMSO is considered to have a relatively high flash point, typically above 90 C.

Miscibility:

DMSO is miscible with water and many organic solvents.

Residue on Evaporation:

The residue left after evaporation may be specified to ensure a clean product.