About 30 other workers were treated at the warehouse in Robbinsville, authorities said.
Robbinsville spokesman John Nalbone explained to the Post that the can of bear spray released in the facility contained capsaicin, derived from the chile pepper plant capsicum.
According to media reports, the bear repellant is concentrated Capsaican, which is an irritant to mammals - as one would imagine for something meant to keep bears at bay. Employees were reportedly relocated to a "safe place", though those "experiencing symptoms" were said to be treated "onsite" - presumably not in the warehouse full of bear repellant.
Amazon's workforce now includes 575,700 employees globally as well as 80,000 robots known as "Kiva" which operate in warehouses. As a precaution, some employees were transported to local hospitals for evaluation and treatment.
An Amazon spokeswoman told The Register that employee safety was the firm's top priority, and claimed "all of the impacted employees have been or are expected to be released from hospital within the next 24 hours". We'd like to thank all of the first responders who helped with today's incident. Workers were given the okay to return to work later Wednesday evening.
"Amazon's automated robots put humans in life-threatening danger", declared Stuart Appelbaum, president of the Retail, Wholesale and Department Store Union.
"This is another outrageous example of the company putting profits over the health and safety of their workers, and we can not stand for this". Amazon workers are not unionized, but species solidarity supersedes union ties.
The US Occupational Safety and Health Administration's investigation into the incident could take up to six months to complete.