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Registry of Toxic Effects of Chemical Substances (RTECS)

Uranium(IV) oxide

RTECS #

YR4705000

CAS #

1344-57-6

Updated

September 201

Molecular Weight

270.03

Molecular Formula

O2U

Synonyms

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
inhalation/rat lowest published toxic concentration: 375 mg/m3/2HBehavioral: Food intake (animal)

Nutritional and Gross Metabolic: Weight loss or decreased weight gain
JTEHF8 69,1629,2006

Other Multiple Dose Data and References

Route/OrganismDoseEffectReference
inhalation/Dog lowest published toxic concentration: 5.8 mg/m3/2Y- intermittentLung, Thorax, or Respiration: Other changesVCVN1* -,281,1988
inhalation/monkey lowest published toxic concentration: 5.8 mg/m3/2Y- intermittentLung, Thorax, or Respiration: Fibrosis (interstitial)VCVN1* -,281,1988

Reviews

OrganizationStandardReference
American Conference of Governmental Industrial Hygienists (ACGIH)Threshold Limit Value-time-weighted average 0.2 mg(U)/m3;short term exposure limit 0.6 mg(U)/m3DTLVS* TLV/BEI,2013
American Conference of Governmental Industrial Hygienists (ACGIH)Threshold Limit Value-Confirmed human carcinogenDTLVS* TLV/BEI,2013
TOXICOLOGY REVIEWENTOX* -,406,2005
TOXICOLOGY REVIEWHBTME* ,881,2007

Standards and Regulations

OrganizationStandardReference
Occupational Exposure Limit-BELGIUMtime-weighted average 0.2 mg(U)/m3, short term exposure limit 0.6 mg(U)/m3, MAR2002
Occupational Exposure Limit-KOREAtime-weighted average 0.2 mg(U)/m3, short term exposure limit 0.6 mg(U)/m3, 2006
Occupational Exposure Limit-NEW ZEALANDtime-weighted average 0.2 mg(U)/m3, carcinogen, JAN2002
Occupational Exposure Limit-SWITZERLANDMAK-week 0.2 mg(U)/m3, inhal, JAN2011
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