Borax

Borax, kent as sodium borate, sodium tetraborate, or disodium tetraborate an aw, is an important boron compoond, a meeneral, an a saut o boric acid.

Borax
Borax creestals
Baw-an-stick model o the unit cell o borax decahydrate
Names
IUPAC name
Sodium tetraborate decahydrate
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
EC Nummer 215-540-4
KEGG
UNII
Properties
Na2B4O7·10H2O or Na2[B4O5(OH)4]·8H2O
Molar mass 381.38 (decahydrate)
201.22 (anhydrate)
Appearance white solit
Density 1.73 g/cm3 (solid)
Meltin pynt 743 °C (1,369 °F; 1,016 K) anhydrate[1]
Bylin pynt 1,575 °C (2,867 °F; 1,848 K)
Magnetic susceptibility −85.0·10−6 cm3/mol
Structur
Monoclinic Prismatic
Space group C2/c
Pynt group 2/m
Pharmacology
S01AX07 (WHO)
Hazards
GHS pictograms The health hazard pictogram in the Globally Harmonized Seestem o Classification an Labellin of Chemicals (GHS)
GHS hazard statements H360
GHS precautionary statements P201, P308+313
NFPA 704
US heal exposur leemits (NIOSH):
PEL (Permissible)
none[2]
REL (Recommendit)
TWA 1 mg/m3 (anhydrate an pentahydrate)[2][3]
TWA 5 mg/m3 (decahydrate)[4]
IDLH (Immediate danger)
N.D.[2]
Relatit compoonds
Ither anions
Sodium aluminate; sodium gallate
Ither cations
Potassium tetraborate
Relatit compoonds
Boric acid, sodium perborate
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
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Infobox references

ReferencesEedit

  1. Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. p. 88. ISBN 0-8493-0486-5.
  2. a b c NIOSH Pocket Guide tae Chemical Hazards 0057
  3. NIOSH Pocket Guide tae Chemical Hazards 0059
  4. NIOSH Pocket Guide tae Chemical Hazards 0058
  5. "Potential Commodities NFPA 704" (PDF). Archived frae the original (PDF) on 17 Mey 2016. Retrieved 18 Mairch 2018.