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LC5252 di-Sodium tetraborate

anhydrous GR for analysis


Order number Packaging Quantity Price €
AC32252 Plastic bottle 250 g 32.40
AC32252 Plastic bottle 1 kg 86.40


Product information
Synonyms Borax
Hill Formula B4Na2O7
Chemical formula Na2B4O7
HS Code 2840 11 00
EC number 215-540-4
Molar mass 201.21 g/mol
EC index number 005-011-00-4
CAS number 1330-43-4


Chemical and physical data
Solubility 25.6 g/l (20 °C)
Melting point 742 °C
Molar mass 201.21 g/mol
Density 2.37 g/cm3 (20 °C)
Bulk density 700 kg/m3
pH value 9.2 (25 g/l, H2O, 20 °C)
Boiling point 1575 °C (decomposition)
Vapor pressure 7.3 hPa (1200 °C)


Safety information according to GHS
Hazard Statement(s) H360FD: May damage fertility. May damage the unborn child.
Precautionary Statement(s) P201: Obtain special instructions before use.
P308 + P313: IF exposed or concerned: Get medical advice/ attention.
Signal Word Danger
Hazard Pictogram(s)
RTECS ED4588000
Storage class 6.1B Non combustible substances, toxic
WGK WGK 1 slightly water endangering
Disposal 3
Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.


Safety information
R Phrase R 60-61
May impair fertility.May cause harm to the unborn child.
S Phrase S 53-45
Avoid exposure – obtain special instructions before use.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
Categories of danger toxic for reproduction
Hazard Symbol Toxic


Toxicological data
LD 50 oral LD50 rat 1200 mg/kg
LD 50 dermal LD50 rabbit > 2000 mg/kg


Assay (acidimetric) ≥ 98.0 %
Chloride (Cl) ≤ 0.001 %
Phosphate (PO4) ≤ 0.002 %
Sulphate (SO4) ≤ 0.005 %
Heavy metals (as Pb) ≤ 0.002 %
Ca (Calcium) ≤ 0.005 %
Fe (Iron) ≤ 0.001 %