Liquid nitrogen

Liquid nitrogen (CAS 7727-37-9), a cryogenic gas regulated as E941 in food applications, is produced by fractional distillation of air.

Where is Liquid nitrogen used?

• Industrial: ultra-low-temperature refrigerant and inert blanketing agent
• Food processing: cryogenic tunnel freezing of meat, seafood, and baked goods
• Pharmaceutical and biotech: cryopreservation of cell lines, biological samples, and vaccines
• Electronics and semiconductors: purging process chambers, cooling components during precision machining, and maintaining inert atmospheres during sensitive fabrication steps
• Beverage and packaging lines: injected into containers before sealing to displace oxygen and extend shelf life
• It is essential for API intermediates requiring storage below −150°C.

Good to know: Food-grade supply conforming to E941 specifications and industrial-grade product are the standard commercial distinctions.

Commercial specifications

• Purity levels typically range from 99.998% for high-purity applications to standard industrial grades
• Bulk dewars, ISO tanks, and cryogenic cylinders, with delivery formats scaled to site volumes
• On-site generation systems for high-volume users