Anhydrous Solvents

ANHYDROUS SOLVENTS

The use of anhydrous solvents in organic and inorganic chemistry is essential due to the high number of reactions that are sensitive to moisture and air. In addition, new techniques of combinatorial chemistry and biotechnology also require low water content solvents.
Distillation and vacuum transfers to obtain anhydrous solvents are hazardous and time consuming but, often, they are the only way to get a solvent anhydrous enough.
Scharlau does it for you.

We offer you two families of low water content solvents:
• Anhydrous solvents
• Anhydrous solvents over molecular sieves

Anhydrous solvents are distilled under stringent vacuum conditions so that minimum content of water is guaranteed. They are bottled in 250 ml amber crimp cap bottles sealed with septa to provide a convenient way to withdraw solvent in anhydrous conditions.
Once the septum is pierced, there is always a risk of moisture contamination. Because of that, small capacity bottles are adviceable.

We recommend the following procedure to withdraw solvent in anhydrous conditions:

1. Prepare a small diameter dry syringe to pierce septum
2. Fill it with a dry inert gas
3. Choose a new injection site everytime you pierce the septum
4. Push the inert gas into the bottle
5. Withdraw the required amount of solvent

Anhydrous over molecular sieves solvents keep its quality due to the zeolites inside the bottle which, trap traces of water. This range is the right choice when low water solvents economically priced are needed. We bottle them in our standard 1 l amber bottles.

WATER CONTENT COMPARISON
	ANHYDROUS		ANHYDROUS OVER MOLECULAR SIEVES
DESCRIPTION	CAT. NO.	WATER CONTENT	CAT. NO.	WATER CONTENT
Acetone	AC0319	< 50 ppm	-
Acetonitrile	AC0326	< 10 ppm	AC0370	< 100 ppm
Benzene	BE0032	< 50 ppm	-
Benzyl alcohol	AL0163	< 100 ppm	-
1-Butanol	AL0172	< 100 ppm	-
2-Butanol	AL0178	< 100 ppm	-
tert-Butyl methyl ether	ME0555	< 50 ppm	-
Chloroform (amylene stabilized)	CL0202	< 30 ppm	CL0219	< 50 ppm
Cyclohexane	CI0030	< 50 ppm	CI0029	< 50 ppm
1,2-Dichloroethane	DI0411	< 50 ppm	-
Dichoromethane	CL0349	< 30 ppm	CL0350	< 50 ppm
Diethyleter	ET0083	< 50 ppm	ET0074	< 50 ppm
N,N-Dimethylacetamide	DI0861	< 50 ppm	-
N,N-Dimethylformamide	DI1063	< 50 ppm	DI1073	< 100 ppm
Dimethylsulfoxide	SU0152	< 50 ppm	SU0158	< 50 ppm
1,4-Dioxane	DI1288	< 50 ppm	DI1294	< 100 ppm
Ethyl acetate	AC0144	< 50 ppm	AC0141	< 50 ppm
Heptane	HE0126	< 30 ppm	HE0129	< 50 ppm
n-Hexane	HE0233	< 20 ppm	HE0236	< 100 ppm
Isopropyl ether	ET0089	< 50 ppm	-
Methanol	ME0314	< 30 ppm	ME0325	< 100 ppm
1-Methyl-2-pyrrolidone	ME0498	100 ppm	ME0502	< 100 ppm
2-Propanol	AL0317	< 50 ppm	AL0324	< 50 ppm
Pyridine	PI0125	< 50 ppm	PI0126	< 50 ppm
Tethahydrofuran	TE0222	< 50 ppm	TE0229	< 50 ppm
Toluene	TO0084	< 30 ppm	TO0087	< 50 ppm
2,2,4-Trimethylpentane	IS0161	< 30 ppm	IS0164	< 50 ppm