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hexane FOOD GRADE

In industry, hexanes are used in the formulation of glues for shoes, leather products, and roofing. They are also used to extract cooking oils (such as canola oil or soy oil) from seeds, for cleansing and degreasing a variety of items, and in textile manufacturing. They are commonly used in food based soybean oil extraction in the United States, and are potentially present as contaminants in all soy food products in which the technique is used; the lack of regulation by the FDA of this contaminant is a matter of some controversy.[6][7]

A typical laboratory use of hexanes is to extract oil and grease contaminants from water and soil for analysis.[8] Since hexane cannot be easily deprotonated, it is used in the laboratory for reactions that involve very strong bases, such as the preparation of organolithiums. For example, butyllithiums are typically supplied as a hexane solution.

Hexanes are commonly used in chromatography as a non-polar solvent. Higher alkanes present as impurities in hexanes have similar retention times as the solvent, meaning that fractions containing hexane will also contain these impurities. In preparative chromatography, concentration of a large volume of hexanes can result in a sample that is appreciably contaminated by alkanes. This may result in a solid compound being obtained as an oil and the alkanes may interfere with analysis.

 

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polyacrylamide Technical 100%

CHARACTERISTIC             

STANDARD

Appearance

Off white , granular powder

Degree of charge, (Mol %)

30--35

Relative Molecular Weight

1500-1800

Bulk Density, kg/m3

750±50

PH of 0.5% solution @ 25?

6-8

Viscosity , cps

 

0.10%

550

0.25%

650

0.50%

1150

Insoluble, % v/v

0.5Max

Residual Acrylamide, %

0.05Max

Standard Viscosity, cp

6-7

 

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