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Boric acid

Properties, data and information sources.

 

Contents

Boric acid is an inorganic chemical compound from the group of oxoacids.

 

Names and Identifiers

Name
Boric acid
Formula
BH3O3
H3BO3
Molar mass
61.831 (g/mol)
CAS registry number
10043-35-3
EC number EINECS
233-139-2
InChI Key
KGBXLFKZBHKPEV-UHFFFAOYSA-N

Other names, synonyms
Orthoboric acid; Boracic acid; Sassolite; Borofax; Trihydroxyborane; Boranetriol; Hydrogen borate

INCI name
BORIC ACID

Latin name
Acidum boricum

 

Chemical formulas

Molecular formula and structural formula of Boric acid:

 

Boric acid

 

BH3O3 or H3BO3

Mr = 61.831 g/mol
SMILES: B(O)(O)O

 

Data and Properties

solubility:
+ Soluble in water (48.8 g/L at 20 °C; 58 g/L at 25 °C).
- Slightly soluble in alcohol.
  partition coefficient logPOW = -1.09 at 22 °C.
melting point
170.9 °C
density
1.435 g cm-3 at 20 °C
pKa value
pK1a = 9.24 at 20 °C

pK2a = 12.4 at 20 °C

pK3a = 13.3 at 20 °C
vapor pressure
0 Pa at 25 °C
standard enthalpy of formation
-1094.3 kJ/mol at 25 °C [s]
-994.1 kJ/mol [g]
standard entropie
90.0 J/(mol K) at 25 °C
Gibbs free energy
-968.9 kJ/mol
melting enthalpy
22.3 kJ/mol
heat capacity
86.1 J/(mol K)
dipole moment
0 D
magnetic susceptibility χ
-34.1 × 10-6 cm3 mol-1

 

Spectroscopic data:

SpectraBase (NMR, IR, FTIR, Raman, UV-Vis, MS ... spectra)
BXR9XadS9X1
NIST IR-Spektrum
Boric acid
Human Metabolome Database (GC-MS, LC-MS/MS spectra, NMR)
HMDB0035731

 

Percentage and isotopic composition:

Mass-related elemental composition and isotope proportions of the compound Boric acid - BH3O3 - calculated based on molecular mass.

Symbol
Element E
Number x
of atoms Ex
Data of the element
and isotopes *
Percentages
of isotopes
Percentage of
Ex in formula mass
B
Boron
1ΣAr = 10.81 u
10B: 10.01294 u [19,65 %]
11B: 11.00931 u [80,35 %]
 
10B: 3.43544 %
11B: 14.0477 %
17.4831 %H
Hydrogen
3 Ar = 1.008 u
ΣAr = 3.024 u
3H: 3.01605 u [<< 1 %]
1H: 1.00783 u [99,99 %]
2H: 2.0141 u [0,01 %]
 
3H: trace
1H: 4.89026 %
2H: 0.00049 %
4.8908 %O
Oxygen
3 Ar = 15.999 u
ΣAr = 47.997 u
16O: 15.99491 u [99,757 %]
17O: 16.99913 u [0,03835 %]
18O: 17.99916 u [0,205 %]
 
16O: 77.43748 %
17O: 0.02977 %
18O: 0.15913 %
77.6261 %

*) The third column lists the atomic masses or isotope masses of the elements involved and - in square brackets - the natural isotope composition.

 

More calculated data

The molar mass is M = 61.831 grams per mole.

The amount of substance in one kilogram of the substance is n = 16.173 mol.

The amount of substance in one gram of the substance is n = 0.016 mol.

Monoisotopic mass: 62.0175239536 Da - related to 11B1H316O3.

 

Boric acid as Active Ingredient

Latin name: Acidum boricum.

ATC Code:
S02AA03

Ear medication (otological agent) for infections (anti-infective agent).

For detailed information on the active ingredient, see: DrugBank DB11326, NCI Thesaurus C47416.

 

Use in food

E-Nummer: E284

In the food industry, boric acid is used as a preservative for fish roe (E number: E284).

EU: Status and regulations see EU Food Additives DB Ref. Number 3072.

 

Use in Cosmetics

INCI Name: BORIC ACID

Boric acid was previously used as an antimicrobial, buffering and denaturing component in cosmetics. A banned ingredient in cosmetic products in the EU!

Source: CosIng (Cosmetic Ingredient Database) number: 32208.

 

Hazard warnings according to GHS

(General information without guarantee of accuracy and completeness! The information does not replace the chemical safety data sheet or a risk assessment, but rather provides a general overview of the risk posed by the hazardous substance.

Signal word: Danger

GHS hazard statements (H phrases):


H360FD
May damage fertility. May damage the unborn child

Boric acid is a substance of very high concern (SVHC) - toxic to reproduction (R).

LD50 (rat, oral): 2660 mg/kg.


Labeling in the EU: See ECHA Substance Infocard 100.030.114.

For toxicology and occupational safety when handling Boric acid as well as measures to be taken in case of danger, see: Hazardous Substances Information System GESTIS, ZVG-Nr. 003640.

International Chemical Safety Card ICSC (SDS, MSDS): See ICSC: 0991.


Note: The labeling requirement according to the CLP Regulation (EU) does not apply, among other things, to certain substances and mixtures for end users that are in the form of finished products, such as pharmaceuticals, veterinary drugs, cosmetics, certain medical products and medical devices, food or feed, as well as certain Food additives or flavorings. Special legal regulations may need to be adhered to here.

 

External Sources

PubChem:ID 7628ChemSpider:ID 7346Kegg database DBGET:ID D01089UNII of the FDA (USA):Unique Ingredient Identifier R57ZHV85D4EPA CompTox Chemicals Dashboard:DTXSID1020194Other CAS RN:12795-04-9; 30698-98-7; 11113-50-1; 2253722-08-4 (also used, outdated or deleted registration numbers)

 

Manufacturers and Sources of Supply

The table below lists producers and suppliers of Boric acid as a commercial chemical for laboratories, research, industry and production with the corresponding contact details.

 

Literature Sources

[0] - Specialist and research articles in scientific journals via PubMed: Boric_acid.

 


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Last update: 2024-09-25


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