Gum Senegal

SYNS ACACIA ACACIA DEALBATA GUM ACACIA GUM ACACIA SENEGAL ACACIA SYRUP AUSTRALIAN GUM GUM ARABIC GUM OVALINE GUM SENEGAL INDIAN GUM NCI-C50748 SENEGAL GUM STARSOLNo. 1 WATTLE GUM... 

Three sorts of gums are used in the manufacture of matches—gum arable, gum Senegal and gum tragacanth. 

On account of its high price, it is frequently adulterated, mostly with insoluble cherr> sulphurous acid to make it appear of better quality for certain purposes. This renders it unsuitable for the manufacture of matches. Since the conditions export from the Sudan have become unfavour-abk, gum arabic is adulterated with gum Senegal indeed, according to Liebermann, the latter is often sslightly acid, is heterogeneous. 

If the gum under examination has not been artificially powdered (by pounding), it is sufficient to observe these external properties to diitinguish gum arabic frtwn gum Senegal. Other gums can also be detected, in this case, according to liebermann, by die deviation of their appearance from the above. 

Gum Senegal coagulates with a number of chemical reagenti, for which reason match-heads prepared with this gum are often not very cohesive. 

On prolonged heating with dilute potassium hydroxide in a test-tube, solutions of gum arabic and dextrin become amber yellow, whereas solutions of gum Senegal arc scarcely coloured, or assume only a faint yellow tint. 

Mixtures of gum arabic and gum Senegal behave towards potassium hydroxide and copper sulphate solution in the same way as gum Senegal alone on boiling with potassium hydroxide ak>ne, however, they behave like gum arabic solutions, the liquid becoming amber yellow. 

Brown Sa/ety Match Composition (Kellner). One hundred and fifty parts of gum Senegal are d sotved in 200 parts of water, and at the same time ao parts of powdered tragacanth are digested in 500 parts of water for twcnty>four hours these solutions are united and boile< , and 100 parts of powdered and sifted potassium chlorate introduced. To... 

Arabin is the soluble portion of gum arabic and gum Senegal— Acacia (TT. S.). To separate it, gum arabic is dissolved in water acidulated with HCl, and precipitated by alcohol. It is a white, amorphous, tasteless substance, which is not colored by iodin is oxidized by HNOs to mucic and saccharic acids is converted by... 

The American market uses Kordofan gum principally. Gum Senegal is not as clean as the Kordofan grades and finds a limited use in this country. It is used extensively, however, in France and Germany. There are many trade designations, some indicating the port from which it is shipped or the numerous names that dealers apply to their products, including also U.S.P. and technical. 

Synonyms Acacia farnesiana Acacia gum Acacia Senegal Acacia syrup Arabic gum Australian gum Gum Arabic Gum hashab Gum ovaline Gum Senegal Indian gum Kordofan gum Senegal gum Sudan gum Classification Water-sol. gum... 

Common/vernacular names Gomme arabi-que, gonnme de Senegal, gum acacia, gum arabic, gum Senegal, gummae mimosae, and kher. 

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