Boric acid
SIGMA/B7901 - suitable for electrophoresis, ≥99.5%
CAS Number: 10043-35-3
Empirical Formula (Hill Notation): H3BO3
Molecular Weight: 61.83
EC Number: 233-139-2
MDL Number: MFCD00011337
Linear Formula: H3BO3
Product Type: Chemical
| anion traces | chloride (Cl-): ≤0.001% |
| phosphate (PO43-): ≤0.001% | |
| sulfate (SO42-): ≤0.01% | |
| assay | ≥99.5% |
| cation traces | Ca: ≤0.005% |
| Fe: ≤0.001% | |
| heavy metals (as Pb): ≤0.001% | |
| density | 1.43 g/cm3 at 20 °C |
| form | powder |
| grade | electrophoresis grade |
| impurities | ≤0.005% Insoluble in methanol |
| InChI | 1S/BH3O3/c2-1(3)4/h2-4H |
| InChI key | KGBXLFKZBHKPEV-UHFFFAOYSA |
| mp | 160 °C (dec.) (lit.) |
| pH | 8.2-10.1 |
| Quality Level | 200 ![]() |
| SMILES string | OB(O)O |
| solubility | H2O: 40 mg/mL, clear, colorless |
| storage temp. | room temp |
| suitability | suitable for electrophoresis (as a reagent) |
| technique(s) | electrophoresis: suitable |
| vapor pressure | 2.6 mmHg ( 20 °C) |
| Application: | Boric acid has been used as a component of tris borate buffer: • for native polyacrylamide gel electrophoresis (PAGE) and denaturing urea-PAGE of tRNA samples(80) • for urea-polyacrylamide electrophoresis of RNA samples(81) • for agarose gel electrophoresis of DNA samples(82) |
| Biochem/physiol Actions: | Boric acid is used in the periodontal therapy as an irrigation solution as it elicits bactericidal effects in microbial biofilms in root canal. Boric acid may favor osteoblastic activity and inhibit bone loss. It inhibits Candida albicans fungal infection and has potential to treat vaginal infection. |
| General description: | Boric acid is a weak acid and is widely used in multi-purpose solutions (MPS) as a buffering agent. It is less toxic and non-volatile in nature. |
| Packaging: | 1 kg in poly bottle |
| Packaging: | 500 g in poly bottle |
| Symbol | GHS08 |
| Signal word | Danger |
| Hazard statements | H360FD |
| Precautionary statements | P201 - P202 - P280 - P308 + P313 - P405 - P501 |
| Hazard Codes | T |
| Risk Statements | 60-61 |
| Safety Statements | 53-45 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Purity | ≥99.5% |
| mp | 160 °C (dec.) (lit.) |
| Density | 1.43 g/cm3 at 20 °C |
| Storage Temp. | room temp |
| UNSPSC | 12161700 |


