Disodium octaborate

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Structural formula
No drawing available
General
Surname Disodium octaborate
other names

Sodium octaborate

Molecular formula Na 2 B 8 O 13
Brief description

Solid

External identifiers / databases
CAS number
  • 12008-41-2
  • 12280-03-4 (tetrahydrate)
EC number 234-541-0
ECHA InfoCard 100,031,388
PubChem 13652275
Wikidata Q27281683
properties
Molar mass 340.45 g mol −1
Physical state

firmly

density

1.87 g cm −3

Melting point

> 1000 ° C

solubility

soluble in water (95 g l −1 at 20 ° C)

safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
08 - Dangerous to health

danger

H and P phrases H: 360FD
P: ?
Authorization procedure under REACH

of particular concern : toxic for reproduction ( CMR )

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Disodium octaborate is an inorganic chemical compound of sodium from the group of borates .

Extraction and presentation

Disodium octaborate can be obtained by reacting boric acid with borax or sodium carbonate .

properties

Disodium octaborate is a solid that is soluble in water. The tetrahydrate is a colorless and odorless solid.

use

Disodium octaborate is used as a wood preservative . It is also used as an insecticide and fungicide .

Hazard assessment

ECHA placed disodium octaborate on the candidate list of substances of very high concern due to its reprotoxic properties .

Individual evidence

  1. ↑ a b c d e f g Entry on disodium octaborate in the GESTIS substance database of the IFA , accessed on August 20, 2020(JavaScript required) .
  2. ↑ Entry on Disodium octaborate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on August 27, 2020. Manufacturers or distributors can expand the harmonized classification and labeling .
  3. ↑ a b Entry in the SVHC list of the European Chemicals Agency , accessed on August 27, 2020.
  4. ^ A b Eula Bingham, Barbara Cohrssen: Patty's Toxicology, 6 Volume Set . John Wiley & Sons, 2012, ISBN 0-470-41081-7 , pp. 912 ( limited preview in Google Book search).
  5. ↑ Google Patents: CN104477930A - Method for synthesis of disodium octaborate tetrahydrate by using one-step boric acid - Google Patents , accessed August 20, 2020
  6. ↑ W. Kliegel: Boron in biology, medicine and pharmacy Physiological effects and application of boron compounds . Springer-Verlag, 2013, ISBN 978-3-662-11266-3 , pp. 190 ( limited preview in Google Book Search).
  7. ↑ Directive 2009/96 / EC of the Commission of July 31, 2009 amending Directive 98/8 / EC of the European Parliament and of the Council to include the active ingredient disodium octaborate tetrahydrate in Appendix I.
  8. ↑ Entry on disodium octaborate in the Pesticide Properties DataBase (PPDB) of the University of Hertfordshire , accessed on August 20, 2020.