Free from prussic acid

Bitter Almond Oil Free from Prussic Acid... 

Bis-di(carboxymethyl)aminomethyl-o-cresolsulfonphthalein, 861 3,7-Bis(dimethylamino)phenazathionium Chloride, 860 Bismuth Nitrate TS, 850 Bisulfite Identification Test, 753 Bitter Almond Oil Free from Prussic Acid, 19... 

The crude oil was carefully mixed with hydrate of potassa and a solution of chloride of iron by strong agitation and then submitted to distillation. The whole of the oil passed over with the water, and perfectly free from prussic acid. By means of a tube, it was separated from the water, and redistilled in a dry apparatus over freshly burned, powdered chalk. 

FFPA. Abbreviation for free from prussic acid. ... 

Bitter almond oil, FFPA (free from prussic acid, outdated term for HCN), can be regarded as pure benzaldehyde it has antipeptic, local anesthetic, and antispasmodic properties it also has narcotic properties at high doses ingestion of 50-60 mL can be fatal due to central nervous depression with respiratory failure (gosselin). ... 

Regulatory Status. Bitter almond essential oil natural extractive and solvent-free oleores-in (free from prussic acid) are GRAS for use in foods ( 182.20). 

The oil used in pharmacy has been freed from prussic acid, but where the crude oil is used it is adjusted to contain from 2 to 4 per cent. The free prussic acid may be determined as follows ... 

We were soon convinced that the content of prussic acid bears no relation to the formation of benzoic acid, and endeavored therefore to obtain a pure oil, free from the benzoic and prussic acids and from water. This purpose was fully accomplished in the following manner. 

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