‌ Description of the morphology of dimethyl sulfoxide (DMSO):

‌ Appearance: Colorless, transparent or slightly yellowish liquid.
‌ Odor: Odorless or almost odorless.
‌ Hygroscopicity: It has strong hygroscopicity and can absorb more than 70% of its own weight of water.
‌ Solubility: It can be mixed with water and ethanol at will, and is insoluble in alkanes. Its 2.16% aqueous solution is isotonic with plasma.
‌ Other characteristics: The freezing point of the aqueous solution is very low, and the freezing point of water can be lowered to -80 degrees at a concentration of 60%. It has a wide solubility range and can dissolve water-soluble, fat-soluble and many drugs that are difficult to dissolve in other solvents. It is known as the “universal solvent”.
DMSO is a colorless, transparent liquid at room temperature. It has unique physical and chemical properties, which makes it widely used in many fields.

Uses of dimethyl sulfoxide (chemical product):

‌Solvent and reaction medium‌: As a polar aprotic solvent, it can dissolve a variety of organic compounds and is widely used as a solvent and reaction medium in organic synthesis‌.
‌Pharmaceutical Applications‌:
‌Anti-inflammatory and analgesic‌: It has significant anti-inflammatory and analgesic effects and can be used to treat inflammatory diseases such as arthritis and gout and relieve pain‌.
‌Promote drug penetration‌: Because of its permeability, it helps drugs penetrate into the human body and is often used as a drug carrier or diluent‌.
‌Industrial Applications‌:
‌Dyeing and recycling‌: used as dyeing solvent, dye remover for synthetic fibers and absorbent for recovering acetylene and sulfur dioxide‌.
‌Others‌: It is also used in synthetic fiber wet spinning solvents, thermoplastic high-strength polysulfone solvents, and pharmaceutical synthetic paint fuels.
Due to its unique physical and chemical properties, dimethyl sulfoxide has shown broad application prospects in many fields.

Dimethyl sulfoxide Chemical Properties
Melting point 18.4 °C
Boiling point 189 °C(lit.)
density 1.100 g/mL at 20 °C
vapor density 2.7 (vs air)
vapor pressure 0.42 mm Hg ( 20 °C)
refractive index n20/D 1.479(lit.)
FEMA 3875 | METHYLSULFINYLMETHANE
Fp 192 °F
storage temp. Store at +5°C to +30°C.
solubility H2O: miscible (completely)
pka 35(at 25℃)
form liquid (temperature dependent)
color clear colorless
Relative polarity 0.444
Odor Mild garlic odor
Odor Type alliaceous
explosive limit 1.8-63.0%(V)
Water Solubility Soluble in water, methanol, acetone, ether, benzene, chloroform.
FreezingPoint 18.4℃
Sensitive Hygroscopic
λmax λ: 285 nm Amax: ≤0.20
λ: 295 nm Amax: ≤0.20
JECFA Number 507
Merck 14,3259
BRN 506008
Dielectric constant 41.9（55℃）

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