Sodium tetrahydroxyborate

Sodium tetrahydroxyborate
Names
	Other names Sodium tetrahydroxidoborate(1−); Sodium tetrahydroxyboranuide;
Identifiers
3D model (JSmol)	Interactive image;
ChemSpider	25947159 ;
PubChem CID	23662119;
	InChI InChI=1S/BH4O4.Na/c2-1(3,4)5;/h2-5H;/q-1;+1 Key: STVZSUXCUPXWTA-UHFFFAOYSA-N ;
	SMILES [B-](O)(O)(O)O.[Na+];
Properties
Chemical formula	Na[B(OH)4]
Molar mass	101.83 g·mol−1
Appearance	Colorless crystalline solid
Density	1.903 g/cm3 (monoclinic),; 2.029 g/cm3 (orthorhombic)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Sodium tetrahydroxyborate is a salt (ionic compound) with chemical formula Na H₄B O₄ or Na⁺[B(OH)₄]⁻. It is one of several sodium borates. At room temperature it is a colorless crystalline solid.

The element ratio corresponds to the oxide mixture Na₂O·B₂O₃·4H₂O, but the structure of the solid is quite different from that suggested by this formula.