Boric acid , AR,≥99.5% , 10043-35-3
Synonym(s):
Boric acid;TBE buffer
CAS NO.：10043-35-3
Empirical Formula: BH3O3
Molecular Weight: 61.83
MDL number: MFCD00236358
EINECS: 233-139-2
PRODUCT Properties
| Melting point: | 160 °C (dec.) (lit.) |
| Boiling point: | 219-220 °C (9.7513 mmHg) |
| Density | 1.440 g/cm3 |
| vapor pressure | 2.6 mm Hg ( 20 °C) |
| storage temp. | Store at +5°C to +30°C. |
| solubility | H2O: soluble |
| pka | 8.91±0.43(Predicted) |
| form | working solution |
| color | ≤10(APHA) |
| Specific Gravity | 1.435 |
| Odor | Odorless |
| PH Range | 3.8 - 4.8 |
| PH | 3.6-4.4 (25℃, saturated solution in H2O) |
| Water Solubility | 49.5 g/L (20 ºC) |
| Sensitive | Hygroscopic |
| λmax | λ: 260 nm Amax: 0.05 λ: 280 nm Amax: 0.05 |
| Merck | 14,1336 |
| BRN | 1697939 |
| Exposure limits | ACGIH: TWA 2 mg/m3; STEL 6 mg/m3 |
| InChIKey | KGBXLFKZBHKPEV-UHFFFAOYSA-N |
| LogP | -1.09 at 22℃ |
Description and Uses
Boric acid is a white, amorphous powder orcolorless, crystalline solid. Molecular weight=61.84;Boiling point=300℃ (decomposes: loses 1/2 its H2O);Freezing/Melting point=170.9℃ (decomposes above100℃). Saturated solutions: at 0℃, 2.6% acid; at 100℃,28% acid. Hazard Identification (based on NFPA-704 MRating System): Health 2, Flammability 0, Reactivity 1.Boric acid is soluble in water; solubility=4.7 g/100 mL at20℃.
It is a precursor material for other boron compounds. A dilute water solution of boric acid is usually employed as a mild antiseptic and eyewash. Boric acid is too employed in leather manufacture, electroplating, and cosmetics.
Safety
| Symbol(GHS) |  GHS08 |
| Signal word | Danger |
| Hazard statements | H360FD |
| Precautionary statements | P201-P202-P280-P308+P313-P405-P501 |
| Hazard Codes | Xi,T,Xn |
| Risk Statements | 36/37/38-60-63-62-61 |
| Safety Statements | 26-36-53-45-37/39-36/37/39-22-24/25-23 |
| WGK Germany | 2 |
| RTECS | ED4550000 |
| F | 3 |
| TSCA | Yes |
| HS Code | 28100090 |
| Toxicity | LD50 orally in rats: 5.14 g/kg (Smyth). |
