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Borates, tetra, sodium salts (Anhydrous)

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Synonyms & Trade Names
Anhydrous borax, Borax dehydrated, Disodium salt of boric acid, Disodium tetraborate, Fused borax, Sodium borate (anhydrous), Sodium tetraborate
CAS No.
1330-43-4
RTECS No.
ED4588000
DOT ID & Guide
Formula
Na₂B₄O₇
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 1 mg/m3
OSHA PEL
none See Appendix G
Measurement Methods
NIOSH 0500;
OSHA ID125G
See: NMAM or OSHA Methods
Physical Description
White to gray, odorless powder. [herbicide] [Note: Becomes opaque on exposure to air.]
Molecular Weight
201.2
Boiling Point
2867°F (Decomposes)
Melting Point
1366°F
Solubility
4%
Vapor Pressure
0 mmHg (approx)
Ionization Potential
NA
Specific Gravity
2.37
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Solid
Incompatibilities & Reactivities
Moisture [Note: Forms partial hydrate in moist air.]
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   ICSC CARD: 1229
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health