Merck
All Photos(2)

1.00765

Supelco

Boric acid

99.9999 Suprapur®

Synonym(s):
Orthoboric acid, Trihydroxidoboron
Linear Formula:
H3BO3
CAS Number:
Molecular Weight:
61.83
MDL number:
EC Index Number:
233-139-2

Quality Level

grade

for inorganic trace analysis

vapor pressure

2.6 mmHg ( 20 °C)

assay

≥99% (acidimetric)
99.9999%

form

solid

potency

2660 mg/kg LD50, oral (Rat)
>2000 mg/kg LD50, skin (Rat)

pH

3.8-4.8 (20 °C, 33 g/L in H2O)

mp

160 °C (dec.) (lit.)

solubility

49.2 g/L

density

1.489 g/cm3 at 23 °C

bulk density

400‑600 kg/m3

anion traces

chloride (Cl-): ≤3 ppm
phosphate (PO43-): ≤0.5 ppm
silicate (as SiO2): ≤0.5 ppm
sulfate (SO42-): ≤5 ppm

cation traces

Ag: ≤0.010 ppm
Al: ≤0.050 ppm
As: ≤0.050 ppm
Au: ≤0.020 ppm
Ba: ≤0.050 ppm
Be: ≤0.010 ppm
Ca: ≤0.050 ppm
Cd: ≤0.010 ppm
Co: ≤0.010 ppm
Cr: ≤0.010 ppm
Cu: ≤0.010 ppm
Fe: ≤0.050 ppm
Ga: ≤0.050 ppm
In: ≤0.020 ppm
K: ≤0.10 ppm
Li: ≤0.010 ppm
Mg: ≤0.10 ppm
Mn: ≤0.010 ppm
Mo: ≤0.010 ppm
N: ≤0.010 ppm
Na: ≤0.050 ppm
Pb: ≤0.020 ppm
Sr: ≤0.010 ppm
Tl: ≤0.020 ppm
V: ≤0.010 ppm
Zn: ≤0.010 ppm

SMILES string

OB(O)O

storage temp.

2-30°C

InChI

1S/BH3O3/c2-1(3)4/h2-4H

InChI key

KGBXLFKZBHKPEV-UHFFFAOYSA-N

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Analysis Note

Purity (metallic): ≥ 99.9999 %
Assay (acidimetric): ≥ 99.0 %
Chloride (Cl): ≤ 3 ppm
Phosphate (PO₄): ≤ 0.5 ppm
Silicate (as SiO₂): ≤ 0.5 ppm
Sulfate (SO₄): ≤ 5 ppm
Ag (Silver): ≤ 0.010 ppm
Al (Aluminium): ≤ 0.050 ppm
As (Arsenic): ≤ 0.050 ppm
Au (Gold): ≤ 0.020 ppm
Ba (Barium): ≤ 0.050 ppm
Be (Beryllium): ≤ 0.010 ppm
Ca (Calcium): ≤ 0.050 ppm
Cd (Cadmium): ≤ 0.010 ppm
Co (Cobalt): ≤ 0.010 ppm
Cr (Chromium): ≤ 0.010 ppm
Cu (Copper): ≤ 0.010 ppm
Fe (Iron): ≤ 0.050 ppm
Ga (Gallium): ≤ 0.050 ppm
In (Indium): ≤ 0.020 ppm
K (Potassium): ≤ 0.10 ppm
Li (Lithium): ≤ 0.010 ppm
Mg (Magnesium): ≤ 0.10 ppm
Mn (Manganese): ≤ 0.010 ppm
Mo (Molybdenum): ≤ 0.010 ppm
Na (Sodium): ≤ 0.050 ppm
Ni (Nickel): ≤ 0.010 ppm
Pb (Lead): ≤ 0.020 ppm
Sr (Strontium): ≤ 0.010 ppm
Tl (Thallium): ≤ 0.020 ppm
V (Vanadium): ≤ 0.010 ppm
Zn (Zinc): ≤ 0.010 ppm

Legal Information

SUPRAPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Hazard Classifications

Repr. 1B

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 1

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