How To Remove Mineral Oil From Sodium Hydride

Examples include hexane heptane diethyl ether dibutyl ether and toluene.

How to remove mineral oil from sodium hydride. Sigma aldrich offers a number of sodium hydride products. The mineral oil is inert and will not interfere with your reaction and runs at the top of a tlccolumn. I used both the nah and kh suspensions a couple of times during my phd for some synthetic preparations and it is fairly straightforward the main thing to keep in mind is that they can react extremely vigorously with water releasing heat and a. However if you used the nah with mineral oil in your reaction and if your product is not hydrocarbon soluble you can washtriturate with pentane or hexane to remove it.

Form microcrystalline dispersion of gray powder in mineral oil. In contact with water it releases flammable gas hydrogen which may ignite spontaneously. Ive never seen it packaged dry and i dont want to. 40 3 the mineral oil is freely miscible with a wide range of hydrocarbons not affecting the activity of sodium hydride.

The compound is often used in this form but the pure grey solid can be prepared by rinsing the commercial product with pentane or thf with care being taken because the waste solvent will contain traces of nah and can ignite in air. Sodium hydride nah is strongly water reactive. The related potassium hydride is invariably sold in a hard to handle suspension thats mostly oil. Sodium hydride nah reacts violently with water liberating hydrogen gas.

Viscosity 75 85 sus at 1000f. Sodium hydride is sold as a mixture of 60 sodium hydride ww in mineral oil. View information documentation regarding sodium hydride including cas msds more. Such a dispersion is safer to handle and weigh than pure nah.

Most of the time it is not necessary to remove it. 60 3 diluent mineral oil. Sodium hydride is a severe irritant to skin and eyes. Repeat then add your reaction solvent.

Sodium hydride is sold by many chemical suppliers usually as a mixture of 60 sodium hydride ww in mineral oil. Spontaneous ignition in air can occur. Swirl with hexaneheptane let it settle pipette off the clear solvent. At least the flames are prettier.

Such dispersion is safer to handle and weigh than pure nah. Place your weighed sodium hydride dispersion in the reaction flask.