Functional Roles
Industries Served
Physical Properties
physical_description
Colourless, odourless, transparent crystals or white granules or powder; slightly unctuous to the touch; occurs in nature as the mineral sassolite
color/form
Colorless, transparent crystals or white granules or powder
odor
Odorless
taste
Faintly bitter
boiling_point
572 u00b0F at 760 mmHg (decomposes) (NTP, 1992)
melting_point
340 u00b0F (NTP, 1992)
solubility
Water solubility: 2.52% at 0 u00b0C; 3.49% at 10 u00b0C; 4.72% at 20 u00b0C; 6.23% at 30 u00b0C; 8.08% at 40 u00b0C; 10.27% at 50 u00b0C; 12.97% at 60 u00b0C; 15.75% at 70 u00b0C; 19.10% at 80 u00b0C; 23.27% at 90 u00b0C; 27.53% at 100 u00b0C
density
1.435 at 68 u00b0F (USCG, 1999) - Denser than water; will sink
vapor_pressure
1.6X10-6 mm Hg at 25 u00b0C (2.136X10-4 Pa); log P (in Pa) = 26.83 - 9094/T where T is deg K
logp
log Kow = 0.175
stability/shelf_life
...Stable up to 100 u00b0C
decomposition
Boric acid decomposes in heat above 100 u00b0C forming boric anhydride and water.
ph
3,8-4,8 (3,3 % aqueous solution)
refractive_index
Index of refraction: 1.337, 1.461, 1.462
dissociation_constants
Ka = 5.80X10-10 at 25 u00b0C (pKa = 9.24)
other_experimental_properties
Boric acid will form soluble salts with monovalent cations (e.g. Na2B407.1OH20, 6% in water) and insoluble salts with divalent cations (e.g. CaB407.6H20, almost insoluble in cold water).
GHS / SDS Safety
Danger
Irritant
Health Hazard
- H315: Causes skin irritation [Warning Skin corrosion/irritation]
- H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
- H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
- H360FD: May damage fertility; May damage the unborn child [Danger Reproductive toxicity]
- H360 (100%): May damage fertility or the unborn child [Danger Reproductive toxicity]
- H360FD (11.2%): May damage fertility; May damage the unborn child [Danger Reproductive toxicity]
- H402: Harmful to aquatic life [Hazardous to the aquatic environment, acute hazard]
- H303: May be harmful if swallowed [Warning Acute toxicity, oral]
- H360 (88.7%): May damage fertility or the unborn child [Danger Reproductive toxicity]
- H360: May damage fertility or the unborn child [Danger Reproductive toxicity]
- H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
- H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
Chemical Identity
| CAS Number | 10043-35-3 |
| IUPAC Name | boric acid |
| InChI Key | KGBXLFKZBHKPEV-UHFFFAOYSA-N |
| PubChem CID | 7628 |
| INCI Name | BORIC ACID |
Synonyms & Trade Names
Full Description
Boric acid (CAS 10043-35-3) is a white crystalline solid acid with the molecular formula BH3O3, primarily used for pH adjustment applications in industrial processes. This versatile chemical serves critical functions in industrial manufacturing, oil & gas operations, and textile processing industries. With a melting point of 340°F and water solubility ranging from 2.52% at 0°C to 6.23% at 30°C, boric acid provides reliable performance across various temperature conditions.