Merck
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1.00165

Supelco

Boric acid

for analysis EMSURE® ACS,ISO,Reag. Ph Eur

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

ACS reagent

Agency

reag. ISO
reag. Ph. Eur.

vapor pressure

2.6 mmHg ( 20 °C)

product line

EMSURE®

assay

99.5-100.5% (alkalimetric)

form

solid

potency

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

impurities

≤0.005% In methanol insoluble matter
≤0.05% Nonvolatile with methanol

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-): ≤0.0003%
phosphate (PO43-): ≤0.0005%
sulfate (SO42-): ≤0.0005%

cation traces

Ca: ≤0.002%
Fe: ≤0.0001%
Pb: ≤0.001%
heavy metals (as Pb): ≤0.0005%

storage temp.

2-30°C

SMILES string

OB(O)O

InChI

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

InChI key

KGBXLFKZBHKPEV-UHFFFAOYSA-N

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Analysis Note

Assay (alkalimetric): 99.5 - 100.5 %
Identity: passes test
Appearance of solution: passes test
pH-value (3.3 %, water): 3.8 - 4.8
Chloride (Cl): ≤ 0.0003 %
Phosphate (PO₄): ≤ 0.0005 %
Sulfate (SO₄): ≤ 0.0005 %
Solubility in ethanol: passes test
In methanol insoluble matter: ≤ 0.005 %
Heavy metals (as Pb): ≤ 0.0005 %
Ca (Calcium): ≤ 0.002 %
Fe (Iron): ≤ 0.0001 %
Pb (Lead): ≤ 0.001 %
Organic impurities: passes test
Nonvolatile with methanol: ≤ 0.05 %
Corresponds to ACS,ISO,Reag. Ph Eur

Legal Information

EMSURE 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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