CAS #:

Linear Formula:

NaBO2 • 4H2O

MDL Number:


EC No.:



99% Sodium Metaborate Tetrahydrate
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99.5% Sodium Metaborate Tetrahydrate
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99.9% Sodium Metaborate Tetrahydrate
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99.95% Sodium Metaborate Tetrahydrate
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99.99% Sodium Metaborate Tetrahydrate
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99.999% Sodium Metaborate Tetrahydrate
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Sodium Metaborate Tetrahydrate Properties (Theoretical)

Compound Formula H8BNaO6
Molecular Weight 137.86
Appearance white crystals or crystalline powder
Melting Point 57 °C
Boiling Point N/A
Density N/A
Solubility in H2O N/A
Exact Mass 138.031163
Monoisotopic Mass 138.031163

Sodium Metaborate Tetrahydrate Health & Safety Information

Signal Word Warning
Hazard Statements H315-H319-H335
Hazard Codes Xi
Risk Codes 36/37/38
Safety Statements 26-36
RTECS Number N/A
Transport Information N/A
WGK Germany 3

About Sodium Metaborate Tetrahydrate

Sodium Metaborate Tetrahydrate is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Sodium Metaborate Tetrahydrate Synonyms

Boric acid (HBO2), sodium salt tetrahydrate, Sodium borate tetrahydrate, Boric acid, monosodium salt tetrahydrate

Chemical Identifiers

Linear Formula NaBO2 • 4H2O
MDL Number MFCD00149205
EC No. 231-891-6
Beilstein/Reaxys No. N/A
Pubchem CID 23694267
IUPAC Name sodium; oxido(oxo)borane; tetrahydrate
SMILES [Na+].O.O.O .O.[O-]B=O
InchI Identifier InChI=1S/BO2.Na.4H2O/c2-1-3;;;;;/h;;4*1H2/q-1;+1;;;;

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


Sodium Bohr ModelSee more Sodium products. Sodium (atomic symbol: Na, atomic number: 11) is a Block D, Group 5, Period 4 element with an atomic weight of 22.989769. The number of electrons in each of Sodium's shells is [2, 8, 1] and its electron configuration is [Ne] 3s1. The sodium atom has a radius of 185.8 pm and a Van der Waals radius of 227 pm. Sodium was discovered and first isolated by Sir Humphrey Davy in 1807. In its elemental form, sodium has a silvery-white metallic appearance. It is the sixth most abundant element, making up 2.6 % of the earth's crust. Sodium does not occur in nature as a free element and must be extracted from its compounds (e.g., feldspars, sodalite, and rock salt). The name Sodium is thought to come from the Arabic word suda, meaning "headache" (due to sodium carbonate's headache-alleviating properties), and its elemental symbol Na comes from natrium, its Latin name.


See more Boron products. Boron Bohr ModelBoron (atomic symbol: B, atomic number: 5) is a Block P, Group 13, Period 2 element with an atomic weight of 10.81. The number of electrons in each of boron's shells is 2, 3 and its electron configuration is [He] 2s2 2p1. The boron atom has a radius of 90 pm and a Van der Waals radius of 192 pm. Boron was discovered by Joseph Louis Gay-Lussac and Louis Jacques Thénard in 1808 and was first isolated by Humphry Davy later that year. Boron is classified as a metalloid is not found naturally on earth. Elemental BoronAlong with carbon and nitrogen, boron is one of the few elements in the periodic table known to form stable compounds featuring triple bonds. Boron has an energy band gap of 1.50 to 1.56 eV, which is higher than that of either silicon or germanium. The name Boron originates from a combination of carbon and the Arabic word buraqu meaning borax.


March 30, 2023
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