Most glove and boot specifications assume the hazard will attack the material. A cryogenic asphyxiant does not. It removes the air instead, and the person inside the suit is unconscious long before any material property becomes relevant.
A Freezer Room in Indiana
On 13 October 2026, firefighters were called to a food plant in New Albany, Indiana, after workers reported dizziness. Crews found elevated carbon monoxide readings, a low-lying fog and liquid nitrogen residue spread across the floor. About thirty people were on shift; reports of hospitalisations range from three to seven. Officials pointed to a fault between a bulk liquid nitrogen tank and a tunnel freezer, and the investigation is still open.
The pattern is not new. In a 2021 poultry plant release examined by the U.S. Chemical Safety Board, two maintenance workers died in a freezer room. Four colleagues died trying to reach them and three more were seriously hurt. The board found no oxygen monitoring, no alarm, and no equipment or training for entry, and has since asked the regulator for a dedicated standard on cryogenic asphyxiants. None exists.
Cellars, Pits and the Same Mechanism
The identical hazard runs through sites that hold no industrial gas at all. On 20 September 2026, three people were found unconscious in a wine cellar in Vaslui County, Romania, one of them in cardiac arrest; the following day, two more were carried out of a cellar in Bârlad. Six days later, a distillery in Sichuan province reported three deaths in a fermentation pit, where gas had backed up through a drainage line. In each case the asphyxiant was a fermentation by-product, and the first casualty was followed by others who entered unprotected.
That is the commercial point. The addressable market is not only industrial gas users; it is breweries, wineries, distilleries, pickling and cheese plants, modified-atmosphere packing lines and cold stores.
Why Permeation Data Cannot Answer This
Carbon dioxide and nitrogen are odourless and cause no irritation, so there is no coughing fit, no streaming eyes, no warning at all. Judgement slips below roughly 19.5 percent oxygen; at single-digit concentrations collapse arrives in seconds. Both gases are heavier than air and pool in pits, on cellar floors and in the space below a freezer deck, precisely where someone kneels to help a colleague.
The visible fog is condensed water, not the gas. The asphyxiant reaches beyond the plume, so marking a boundary by eye fails. Nor does any barrier help: an eight-hour breakthrough time protects a hand attached to a body that has stopped breathing.
Cold is the second hazard. Liquid nitrogen sits near minus 196 degrees Celsius and solid carbon dioxide near minus 78.5. EN 511 rates cold down to minus 50, so no standard rating covers this duty. Ask suppliers for their own low-temperature flex and embrittlement results rather than a pictogram.
What to Specify, and What to Count
Equip by role rather than by gas. The entrant needs a thin, abrasion-resistant liner under a loose cryogenic overmitt that can be thrown off in a single pull, a gauntlet worn outside the sleeve, and boots with no laces, an insulating midsole and an outsole that still grips frosted stainless. The technician topping up tanks or clearing a jam needs a long-gauntlet mitt, dry hands and a cuff that reaches past the freezer opening. The lone night sanitation worker needs a monitor and a second person on site before they need a better glove.
Then count the right thing. Four entry-rated ensembles and two portable oxygen meters will prevent more deaths than two hundred pairs of examination gloves.