Grades nitrogen trifluoride

Nitrogen trifluoride is available in grades ranging from 98 percent to 99.995 percent v/v minimum purity. 

Nitrogen trifluoride is a colorless gas with little odor. However, commercial grades contaminated with trace levels of active fluorides have a pungent, musty odor. 

Dimethyl ether and nitrogen were dried by passage through columns of Drierite. Boron trifluoride etherate (Eastman Practical Grade) was redistilled. Epichlorohydrin (Eastman Organic Chemicals) and methylene chloride (Fisher Scientific Company) were used as received. 

Boron trifluoride etherate is freshly distilled over CaH2 or used directly when obtained as an analytical grade chemical. This reagent is kept at 4°C under nitrogen as it is a moisture-sensitive reagent. 

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