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Borates, tetra, sodium salts (Pentahydrate)																				Related Pages
Synonyms & Trade Names
			Borax pentahydrate, Sodium borate pentahydrate, Sodium tetraborate pentahydrate
CAS No.
			12179-04-3
	RTECS No.
			VZ2540000
	DOT ID & Guide

FormulaNa2B4O7 • 5H2O
	Conversion
	IDLH
			N.D.See: IDLH INDEX

Exposure Limits
			NIOSH RELTWA 1 mg/m3OSHA PEL none See Appendix G
	Measurement Methods
			**NIOSH** 0500;**OSHA** ID125G
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless or white, odorless crystals or free-flowing powder.
					[herbicide] [Note: Begins to lose water of hydration at 252°F.]													
										
Molecular Weight291.4	
	Boiling Point?
	Melting Point392°F
	Solubility3%
	Vapor Pressure0 mmHg (approx)
	Ionization PotentialNA											
Specific Gravity1.82	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
Noncombustible Solid
Incompatibilities & Reactivities
			None reported
					[Note: See the reactivities & incompatibilities reported for the related substance Borax decahydrate above.]
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, upper respiratory system; dermatitis; epistaxis (nosebleed); cough, dyspnea (breathing difficulty)
Target Organs
			Eyes, skin, respiratory system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**No recommendation
							**Eyes:**No recommendation
							**Wash skin:**Daily
							**Remove:**No recommendation
							**Change:**Daily
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			Not available.
				Important additional information about respirator selection
See also
			INTRODUCTION

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Chemical Names, Synonyms and Trade Names
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CAS Numbers
RTECS Numbers
Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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