Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content

Registry of Toxic Effects of Chemical Substances (RTECS)

Boron oxide

RTECS #

ED7900000

CAS #

1303-86-2

Updated

September 201

Molecular Weight

69.62

Molecular Formula

B2O3

Synonyms

Boric anhydride
Boron oxide (ACGIH:OSHA)
Boron oxide, aerosol
Boron sesquioxide
Boron trioxide
Diboron trioxide
Fused boric acid

Skin and Eye Irritation and References

Route/OrganismDoseEffectReference
eye /rabbit 50 mgAIHAAP 20,284,1959
skin /rabbit 1 gmAIHAAP 20,284,1959

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
inhalation/rat Lowest published lethal concentration: 150 mg/m3/2HVCVN1* -,193,1988
intraperitoneal/mouse lethal dose (50 percent kill): 1868 mg/kgVCVN1* -,193,1988
oral/mouse lethal dose (50 percent kill): 3163 mg/kgVCVN1* -,193,1988
oral/rat lethal dose (50 percent kill): 3150 mg/kgVCVN1* -,193,1988

Other Multiple Dose Data and References

Route/OrganismDoseEffectReference
inhalation/Dog lowest published toxic concentration: 57 mg/m3/23W- intermittentKidney, Ureter, and Bladder: Other changes in urine composition

Kidney, Ureter, and Bladder: Incontinence		VCVN1* -,194,1988
inhalation/rat lowest published toxic concentration: 77 mg/m3/6H/24W- intermittentKidney, Ureter, and Bladder: Urine volume increased

Kidney, Ureter, and Bladder: Other changes in urine composition		AIHAAP 20,284,1959
inhalation/rat lowest published toxic concentration: 150 mg/m3/2H/15D- intermittentOlfaction: Other olfaction effects

Lung, Thorax, or Respiration: Other changes

Nutritional and Gross Metabolic: Weight loss or decreased weight gain		VCVN1* -,194,1988
inhalation/rat lowest published toxic concentration: 470 mg/m3/24W- intermittentKidney, Ureter, and Bladder: Other changes in urine composition

Kidney, Ureter, and Bladder: Incontinence		VCVN1* -,194,1988

Reviews

OrganizationStandardReference
American Conference of Governmental Industrial Hygienists (ACGIH)Threshold Limit Value-time-weighted average 10 mg/m3DTLVS* TLV/BEI,2013

Standards and Regulations

OrganizationStandardReference
Environmental Protection Agency (EPA) Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) 1988 PESTICIDE SUBJECT TO REGISTRATION OR RE-REGISTRATIONFEREAC 54,7740,1989
Environmental Protection Agency (EPA) Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) 1998 STATUS OF PESTICIDESRED CompletedRBREV* -,91,1998
Mine Safety and Health Administration (MSHA) STANDARD-airtime-weighted average 10 mg/m3DTLVS* 3,26,1971
Occupational Exposure Limit IN ARGENTINA, BULGARIA, COLOMBIA, JORDAN check ACGIH TLV;
Occupational Exposure Limit IN SINGAPORE, VIETNAM check ACGIH TLV
Occupational Exposure Limit-AUSTRALIAtime-weighted average 10 mg/m3, JUL2008
Occupational Exposure Limit-AUSTRIAMAK-TMW 15 mg/m3;KZW 75 mg/m3, inhal, 2007
Occupational Exposure Limit-BELGIUMtime-weighted average 10 mg/m3, MAR2002
Occupational Exposure Limit-DENMARKtime-weighted average 10 mg/m3, MAY2011
Occupational Exposure Limit-FRANCEVME 10 mg/m3, FEB2006
Occupational Exposure Limit-ICELANDtime-weighted average 10 mg/m3, NOV2011
Occupational Exposure Limit-KOREAtime-weighted average 10 mg/m3, 2006
Occupational Exposure Limit-MEXICOtime-weighted average 10 mg/m3;short term exposure limit 20 mg/m3, 2004
Occupational Exposure Limit-NEW ZEALANDtime-weighted average 10 mg/m3, JAN2002
Occupational Exposure Limit-NORWAYtime-weighted average 10 mg/m3, JAN1999
Occupational Exposure Limit-PERUtime-weighted average 10 mg/m3, JUL2005
Occupational Exposure Limit-POLANDMAC(time-weighted average) 10 mg/m3, JAN1999
Occupational Exposure Limit-RUSSIAshort term exposure limit 5 mg/m3, JUN2003
Occupational Exposure Limit-SWITZERLANDMAK-week 10 mg/m3, inhal, JAN2011
Occupational Exposure Limit-THE NETHERLANDSMAC-TGG 10 mg/m3, 2003
Occupational Exposure Limit-THE PHILIPPINEStime-weighted average 15 mg/m3, JAN1993
Occupational Exposure Limit-UNITED KINGDOMtime-weighted average 10 mg/m3;short term exposure limit 20 mg/m3, OCT2007
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction)8H time-weighted average 15 mg/m3, total dustCFRGBR 29,1926.55,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Federal Contractors)8H time-weighted average 15 mg/m3CFRGBR 41,50-204.50,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry)8H time-weighted average 15 mg/m3, total dustCFRGBR 29,1910.1000,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards)8H time-weighted average 15 mg/m3, total dustCFRGBR 29,1915.1000,1993
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards)8H time-weighted average 5 mg/m3, respirable fractionCFRGBR 29,1915.1000,1993

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO BORON OXIDE, total dust-air10H time-weighted average 10 mg/m3NIOSH* DHHS #92-100,1992
National Occupational Exposure Survey 1983Hazard Code 12963; Number of Industries 112; Total Number of Facilities 10437; Number of Occupations 78; Total Number of Employees Exposed 162342; Total Number of Female Employees Exposed 18457
National Occupational Hazard Survey 1974Hazard Code 12963; Number of Industries 69; Total Number of Facilities 2563; Number of Occupations 49; Total Number of Employees Exposed 15319

Status in Federal Agencies

OrganizationReference
EPA TSCA Section 8(b) CHEMICAL INVENTORY
EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JANUARY 2001
On EPA IRIS database

Follow NIOSH

NIOSH Homepage

TOP