Editing Samarium (section)

== Biological role and precautions ==
{{Chembox
| container_only = yes
|Section7={{Chembox Hazards
| Hazards_ref = <ref>{{Sigma-Aldrich|id=263184|name=Samarium 263184|access-date=2023-04-11}}</ref>
| ExternalSDS =
| GHSPictograms = {{GHS02}}
| GHSSignalWord = Warning<!-- source fisherthermop says 'danger'? (11Apr2023) -->
| HPhrases = {{H-phrases|261}}
| PPhrases = {{P-phrases|P231 + P232|P280|P370 + P378|P501}}
| NFPA-H = 2
| NFPA-F = 3
| NFPA-R = 2
| NFPA-S = W
| NFPA_ref = <ref>{{cite web|url=https://www.fishersci.com/store/msds?partNumber=AA40297DH&productDescription=SAMR+RD+6.35MMDIA+99.9+25MM&vendorId=VN00024248&countryCode=US&language=en |title=Safety Data Sheet |access-date=2023-04-11 |date=2020-02-14 |publisher=Thermo Fisher Scientific }}</ref>
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Samarium salts stimulate metabolism, but it is unclear whether this is from samarium or other lanthanides present with it. The total amount of samarium in adults is about 50&nbsp;[[microgram|μg]], mostly in liver and kidneys and with ~8&nbsp;μg/L being dissolved in blood. Samarium is not absorbed by plants to a measurable concentration and so is normally not part of human diet. However, a few plants and vegetables may contain up to 1 part per million of samarium. Insoluble salts of samarium are non-toxic and the soluble ones are only slightly toxic.<ref name="emsley">{{cite book|title= Nature's Building Blocks: An A–Z Guide to the Elements|last= Emsley|first= John|publisher= Oxford University Press|date=2001|location= Oxford, England, UK|isbn= 0-19-850340-7|chapter= Samarium|pages= [https://archive.org/details/naturesbuildingb0000emsl/page/371 371–374]|chapter-url= https://books.google.com/books?id=j-Xu07p3cKwC&pg=PA371|url= https://archive.org/details/naturesbuildingb0000emsl/page/371}}</ref><ref name="Bayouth">{{cite journal |last1=Bayouth |first1=J. E. |last2=Macey |first2=D. J. |last3=Kasi |first3=L. P. |last4=Fossella |first4=F. V. |title=Dosimetry and toxicity of samarium-153-EDTMP administered for bone pain due to skeletal metastases |journal=Journal of Nuclear Medicine |year=1994 |volume=35 |issue=1 |pages=63–69 |url=https://jnm.snmjournals.org/content/35/1/63.long |pmid=7505819}}</ref> When ingested, only 0.05% of samarium salts are absorbed into the bloodstream and the remainder are excreted. From the blood, 45% goes to the liver and 45% is deposited on the surface of the bones where it remains for 10 years; the remaining 10% is excreted.<ref name="LA2">[http://www.ead.anl.gov/pub/doc/samarium.pdf Human Health Fact Sheet on Samarium] {{webarchive|url=https://web.archive.org/web/20120407032958/http://www.ead.anl.gov/pub/doc/samarium.pdf |date=2012-04-07 }}, Los Alamos National Laboratory</ref>
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