Nitrogen Trichloride detection

Nitrogen trichloride analysis in chlorine

PO-Labs is proud to annonce development of a highly sensitive and accurate instrumental method for analysis of nitrogen trichloride in liquid or gaseus chlorine. Nitrogen trichloride is a non-stable and highly explosive by-product in manufaturing of chlorine and caustic by membrane electrolytic method and it poses severe explosion hazard to chlorine  industry.

This yellow, highly explosive liquid is formed of chlorine or hipochlorites and ammonia or it salts.

Chloramines (especially NCl3) are extremely sensitive to heat, light, vibration, and mechanical stress. Low amount as 0.1g or concentration more than 0.5% of nitrogen chloride or other chloramines considered as extremely dangerous and may cause explosions, severe destruction of equipment and fatal injuries. . Nitrogen chloride may be formed quite often in some industrial processes as a by-product and may cause serious problems for plants that employ technologies such as pulp and paper , chlorine-hydrogen-caustic manufacturing with electrolyses technology, liquid hydrogen manufacturing, and many other industrial processes. However most laboratories avoid working with such a dangerous compound.

Based on our extensive expertise we developed a unique technology that allow us safely synthesize and manipulate chloramines including nitrogen chloride. As a result we developed and validated a sensitive HPLC-UV method for analysis of all three chloramines in gas, liquid or solid samples.

Quantization limits for chloramines depend on particular sample nature and normally they are better than: 1.1 ppm – NH2Cl; 0.5 ppm – NHCl2 and 0.1 ppm – NCl3.       (S/N>10)

UV-spectrum of NCl3 and 3D-chromatogram

NCl3 chromatogram

For questions and analysis order please contact Dr. Oleg Nepotchatykh by e-mail:


1. T. Docter. Formation of NCl3 and N20 in the reaction of NaOCl and nitrogen compounds.  Journal of Hazardous Materials, 12 (1985) 207-224




5. Explosions in mixtures of H2, Cl2, and NCl3.     Ashmore, P. G.    Cambridge Univ.,  UK.    Nature (London, United Kingdom)  (1953),  172  449-50.

6. Formation of Explosive Chlorine-Nitrogen Compounds during the Reaction of Ammonium Compounds with Chlorine.     Knothe, M.; Hasenpusch, W.    Freiberger NE-Metall GmbH,  Freiberg,  Germany.    Inorganic Chemistry  (1996),  35(15),  4529-4530.

7. Hazards caused by trace substances.     Baron, R. Grollier.    Institut Francais du Petrole,  Fr.    Int. Conf. Hazard Identif. Risk Anal., Hum. Factors Hum. Reliab. Process Saf.  (1992),     107-17.  Publisher: AIChE,  New York, N. Y

Please contact us by e-mail for more details  >>>


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