Hazardous collapse

Human Toxicity Extremely hazardous. Collapse, coma, and death from respiratory failure may come within a few seconds after one or two inspirations. Insidious poison, since sense of smell may be fatigued and fail to give warning of high concns. Low concns produce irritation of conjunctiva and mucous membranes. Headache, dizziness, nausea, lassitude may appear after exposure. Clinical Toxicology of Commercial Products, R. E. Gosselin et al., Eds. (Williams Wilkins, Baltimore, 4th ed.. 1976) Section 111, pp 169-173. 

Elsworth D., B Voight, J Simmons, S Young and B Winkler, Vaporization-induced overpressures as a trigger for the hazardous collapse of lava domes, this volume, 2004. 

VAPORIZATION-INDUCED OVERPRESSURES AS A TRIGGER FOR THE HAZARDOUS COLLAPSE OF LAVA DOMES... 

Health Hazards Information - Recommended Personal Protective Equipment Dust mask goggles or face shield protective gloves Symptoms Following Exposure inhalation of dust causes irritation of nose and throat. Ingestion may cause vomiting, salty taste, abdominal pain, diarrhea, convulsions, collapse, thirst, disturbed color vision, and acute toxic nephritis. Contact with eyes causes irritation. 

You should always anticipate hazards such as sharp objects like nails, broken glass, and medical needles slippery surfaces steep grades and potentially unstable surfaces such as walls, floors, or roofs that could cause falls, give way, or collapse. Other common physical hazards include ... 

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