COA Center




Confirms to IP, BP, USP
Orthoboric acid


500 g (00500)

5000 g (05000)

25 Kg (0025K)

50 Kg (0050K)

1PW1200500 1PW1206500 1PDL00030K 1PDLP0065K
Article No. 02218 Grade Extra Pure
Purity 99.5% CAS No. 10043-35-3
Molecular Formula H3BO3 Molecular Weight 61.83
H.S. Code 2810.0020 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour White crystals
Odour Odorless pH value 3.8 - 4.8
Melting point/ Freezing point [°C] 160 °C Boiling point [°C] 300 °C
Vapour pressure [20°C] 3.5 hPa at 20 °C Density [g/cm3] 1.44
Solubility in water [% weight] Soluble in water


Appearance White crystals Assay (alkalimetric; on dried basis) 99.5-100.5%
Identification To comply IP, BP, USP tests Solubility Soluble in water and in ethanol (96 per cent), freely soluble in boiling water and in glycerol (85 per cent)
Appearance of solution To comply IP, BP, USP Substance insoluble in alcohol To comply IP, BP, USP test
pH (3.3% solution in water) 3.8-4.8 Sulphate (SO4) Max 0.045%
Heavy metal (as Pb) max 0.0015% Arsenic (As) max 0.001%
Organic impurities To comply BP test Loss on drying (5hrs; over silica gel) Max 0.5%

Safety Information and Hazard Symbols

Health Hazard
Symbol: GHS08
Signal Word: Danger
Hazardous Statement: H360FD
Precaution Statement: P201-P202-P280-P308+P313-P405-P501
Revision Date: 02-May-2024

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