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Topic	Date	User
Effects of prolonged chalk dust exposure?	27-Feb-2010 At 6:17:27 AM	PDRM
Message
On 27/02/2010 pmonks wrote: >Having become a gym dweller *sigh*, I'm wondering about the long term health >effects of >prolonged chalk dust exposure? "Magnesium carbonate iself is not toxic. However, its excessive use (??) may cause central nervous system depression and cardiac disturbances. It is slightly hazardous in case of skin and eye contact and may cause respiratory and digestive tract irritation in case of ingestion or inhalation." If not pure however may contain traces of crystalline silcates which can cause silicosis of the lungs with long term exposure. Lead time to disease 10 years. Likelihood, low-ish I would think. .Macca

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