BartSimpson BartSimpson:
DrCaleb DrCaleb:
Where does it say it's a neurotoxin?
In the section you quoted:
DrCaleb DrCaleb:
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Special Remarks on Chronic Effects on Humans:
May cause cancer based on animal data. No human data found. May cause adverse reproductive effects(female fertility - post
implanation mortality, fetotoxicity)and birth defects. May affect genetic material
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Potential Acute Health Effects:
Hazardous in case of skin contact (irritant), of ingestion, of inhalation. Slightly hazardous in case of eye contact (irritant).
Severe over-exposure can result in death.
Potential Chronic Health Effects:
CARCINOGENIC EFFECTS: Not available. MUTAGENIC EFFECTS: Mutagenic for mammalian somatic cells.
TERATOGENIC EFFECTS: Not available. DEVELOPMENTAL TOXICITY: Not available. The substance may be toxic to
kidneys, liver, spleen, bone marrow, central nervous system (CNS). Repeated or prolonged exposure to the substance can
produce target organs damage. Repeated exposure to a highly toxic material may produce general deterioration of health by
an accumulation in one or many human organs.
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May also cause central nervous system effects and/or neurological effects, and may affectthe urinary system (kidneys),and liver.
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Products of Biodegradation:
Possibly hazardous short term degradation products are not likely.
But it doesn't say that. It says "
may be toxic" "
may cause cancer"
My point is, Material Safety Data Sheets and WHIMIS sheets are not based on science, they are mostly based on pessimism. If there is data on animal or human reactions to the substance, it's included. If there is no data (where I quoted) then it's based on known effects of the base compounds. Thimerisol contains Mercury, a known neurotoxin, so they include that because it my just be a neurotoxin too but they have no data. So to err on the side of caution is the preferred error.
Info on Data sheets:
http://www.ccohs.ca/oshanswers/legisl/msdss.htmlStandards for Data Sheets:
http://www.ehso.com/msds_regulations.phpAnd the relevant bit- how to list Neurotoxins:
http://www.osha.gov/SLTC/hazardoustoxic ... index.htmlhttp://www.osha.gov/dsg/hazcom/ghd053107.html$1:
Hazard determination does not involve an estimation of risk. The difference between the terms hazard and risk is often poorly understood. Hazard refers to an inherent property of a substance that is capable of causing an adverse effect. Risk, on the other hand, refers to the probability that an adverse effect will occur with specific exposure conditions. Thus, a substance will present the same hazard in all situations due to its innate chemical or physical properties and its actions on cells and tissues. However, considerable differences may exist in the risk posed by a substance, depending on how the substance is contained or handled, personal protective measures used, and other conditions that result in or limit exposure. This document addresses only the hazard determination process, and will not discuss risk assessment, which is not performed under the OSHA HCS.