CAS No.10043-35-3 Orthoboric acid
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Orthoboric acid

Identification
Name Orthoboric acid
CAS Registry Number 10043-35-3
Synonyms EZ TBE(TM) BUFFER;TBE 10X BUFFER;TBE 5X BUFFER;TBE BUFFER;TBE BUFFER DISODIUM;TRIS-BORAT-EDTA PUFFER;TRIS-BORATE-EDTA;TRIS-BORATE-EDTA BUFFER
Molecular Structure Orthoboric acid   10043-35-3
Molecular Formula BH3O3
Molecular Weight 61.83
mp: 169 ℃
Hazard Codes: Details
Risk Statements: 36/37/38-60-63-62
Safety Statements: 26-36-53-45-37/39-36/37/39-22
HS Code: 28100090
 
 
Wiki & MSDS
"Boric" redirects here. For other uses, see Boric (disambiguation).
Boric acid
Structural formula
Space-filling model
Boric acid crystals
Names
IUPAC names
Boric acid
Trihydrooxidoboron
Other names
Orthoboric acid,
Boracic acid,
Sassolite,
Optibor,
Borofax,
Trihydroxyborane
Identifiers
ATC code S02AA03
CAS number 10043-35-3 YesY
ChEBI CHEBI:33118 YesY
ChEMBL ChEMBL42403 YesY
ChemSpider 7346 YesY
EC number 233-139-2
Jmol-3D images Image
Image
KEGG D01089 YesY
PubChem 7628
UNII R57ZHV85D4 YesY
Properties
Molecular formula
H3BO3
Molar mass 61.83 g·mol−1
Appearance White crystalline solid
Density 1.435 g/cm3
Melting point 170.9 °C (339.6 °F; 444.0 K)
Boiling point 300 °C (572 °F; 573 K)
Solubility in water
2.52 g/100 mL (0 °C)
4.72 g/100 mL (20 °C)
5.7 g/100 mL (25 °C)
19.10 g/100 mL (80 °C)
27.53 g/100 mL (100 °C)
Solubility in other solvents Soluble in lower alcohols
moderately soluble in pyridine
very slightly soluble in acetone
Acidity (pKa) 9.24, 12.4, 13.3
Structure
Molecular shape Trigonal planar
Dipole moment Zero
Hazards
MSDS External MSDS
EU classification Harmful (Xn)
Repr. Cat. 2
R-phrases R60 R61
S-phrases S53 S45
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
0
2
0
Flash point Non-flammable
LD50 (Lethal dose)
2660 mg/kg, oral (rat)
Related compounds
Related compounds
Boron trioxide
Borax
Supplementary data page
Structure and
properties
Refractive index (n),
Dielectric constant (εr), etc.
Thermodynamic
data
Phase behaviour
solid–liquid–gas
Spectral data
UV, IR, NMR, MS
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Boric acid, also called hydrogen borate, boracic acid, orthoboric acid and acidum boricum, is a weak, monobasic Lewis acid of boron often used as an antiseptic, insecticide, flame retardant, neutron absorber, or precursor to other chemical compounds. It has the chemical formula H3BO3 (sometimes written B(OH)3), and exists in the form of colorless crystals or a white powder that dissolves in water. When occurring as a mineral, it is called sassolite.

 






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