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B3545

Sigma-Aldrich

Sodium tetraborate decahydrate

BioXtra, ≥99.5%

Synonym(s):

Borax decahydrate, Sodium borate decahydrate

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25 G
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25 G
CA$158.00

About This Item

Linear Formula:
Na2B4O7 · 10H2O
CAS Number:
1303-96-4
Molecular Weight:
381.37
EC Number:
215-540-4
MDL number:
MFCD00149193
UNSPSC Code:
12352300
PubChem Substance ID:
24891726
NACRES:
NA.21

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product line

BioXtra

Quality Level

200

assay

≥99.5%

form

powder

impurities

≤0.001% Phosphorus (P)
≤0.1% Insoluble matter

pH

9.2 (10 g/L)

solubility

H2O: 0.1 M, clear, colorless

density

1.73 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.05%
sulfate (SO42-): ≤0.05%

cation traces

Al: ≤0.0005%
Ca: ≤0.01%
Cu: ≤0.0005%
Fe: ≤0.001%
K: ≤0.005%
Mg: ≤0.0005%
NH4+: ≤0.05%
Pb: ≤0.001%
Zn: ≤0.0005%

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1 of 4

This Item
S9640314571.01964
Sodium tetraborate decahydrate BioXtra, ≥99.5%

B3545

Sodium tetraborate decahydrate

Sodium tetraborate decahydrate ACS reagent, ≥99.5%

S9640

Sodium tetraborate decahydrate

Sodium tetraborate decahydrate puriss. p.a., ACS reagent, reag. ISO, buffer substance, ≥99.5%

31457

Sodium tetraborate decahydrate

di-Sodium tetraborate decahydrate certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S)=9.18₀ (25°C) Certipur®

1.01964

di-Sodium tetraborate decahydrate

assay

≥99.5%

assay

≥99.5%

assay

≥99.5%

assay

-

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

300

product line

BioXtra

product line

-

product line

-

product line

Certipur®

form

powder

form

powder or crystals

form

powder or crystals

form

-

density

1.73 g/mL at 25 °C (lit.)

density

1.73 g/mL at 25 °C (lit.)

density

1.73 g/mL at 25 °C (lit.)

density

1.72 g/cm3 at 20 °C

pH

9.2 (10 g/L)

pH

9.15-9.20 (25 °C, 0.01 M in solution)

pH

9.0-9.6 (20 °C, 5%)

pH

9.2 (20 °C, 47 g/L in H2O)

Application

Sodium tetraborate decahydrate has been used:
  • as a buffer component in biotinylation assay.[1]
  • in preparation of methylene blue solution for histological staining.[2]
  • as a component of trace metal solution for medium supplementation.[3]

Biochem/physiol Actions

Sodium tetraborate decahydrate also called borax.[4] Guar gum based gels crosslinked by borax are effective for wastewater treatment.[5] Borax is used in the preparation of detergents and cosmetics. Borax elicits toxicity in the brain especially in aquatic organisms resulting in edema and congestion.[6]

Legal Information

pictograms

Health hazardExclamation mark
GHS08,GHS07

signalword

Danger

Hazard Classifications

Eye Irrit. 2 - Repr. 1B

Storage Class

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

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type P3 (EN 143) respirator cartridges

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    Certificates of Analysis (COA)

    Lot/Batch Number
    SLCH9707
    SLCG3519
    SLCC8512
    SLBZ0137
    SLBV6583

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