10,10'-oxybisphenoxoarsine

Structural formula
General
Surname	10,10'-oxybisphenoxoarsine
other names	OBPA
Molecular formula	C 24 H 16 As 2 O 3
Brief description	white to off-white, odorless, crystalline powder
External identifiers / databases
EC number	200-377-3
ECHA InfoCard	100,000,343
PubChem	6017
Wikidata	Q3376217
properties
Molar mass	502.23 g mol −1
Physical state	firmly
density	1.4 g cm −3
Melting point	185 ° C
boiling point	Decomposition from 380 ° C
solubility	practically insoluble in water
safety instructions
H and P phrases	H: 331-301-410
	P: ?
Toxicological data	25–35 mg kg −1 ( LD 50 , rat , oral ) ; 400–2000 mg kg −1 ( LD 50 , rabbit , transdermal ) ;
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

10,10'-oxybisphenoxoarsine - also OBPA - is an organic arsenic compound which is used as a biocide additive for plastics - especially soft polyvinyl chloride (PVC) and polyurethane (PU) . 200–500 ppm are already sufficient for good protection. Due to its toxicity, OBPA is only manufactured by Akcros and Rohm and Haas (today Dow Chemical ) and is increasingly being replaced by isothiazolinones , which are, however, highly sensitizing.

The compound was originally introduced as a fungicide in 1965 . Use in the European Union is no longer permitted. The import of OPBA-treated products has also been prohibited since 2016.

OBPA can e.g. B. be replaced by thiabendazole and an iodine-containing biocide such as iodocarb or diiodomethyl p -tolyl sulfone .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Safety data sheet OBPA 10,10′-Oxydiphenoxarsine at kellysolutions.com.
↑ Entry on 10,10′-oxydiphenoxarsine in the GESTIS substance database of the IFA , accessed on July 10, 2016(JavaScript required) .
↑ Martin Bonnet: Plastics in engineering applications: properties, processing and practical use of polymer materials. Vieweg + Teubner Verlag, 2008, ISBN 3-8348-0349-9 ( limited preview in the Google book search).
↑ Patent US3069252 : Methods for the control of the growth of plants and plant parts. Applied November 15, 1960 , published December 18, 1962 , Applicant: Dow Chemical, Inventor: John L Hardy, Melvin J Josephs. ‌
^ Directorate-General for Health and Food Safety of the European Commission: EU pesticide database ; accessed on June 26, 2016 ..
↑ PVC Formulation 2013 ( Memento from August 18, 2013 in the Internet Archive )
↑ Patent WO2013144145 : Stable compositions of thiabendazole and iodine-containing fungicides. Registered on March 26, 2013 , published on October 3, 2013 , applicant: Lanxess, inventor: Hermann Uhr, Andreas Böttcher, Thomas Jaetsch. ‌

[troy-1] ↑ ^a ^b ^c ^d ^e ^f ^g Safety data sheet OBPA 10,10′-Oxydiphenoxarsine at kellysolutions.com.

[2] Entry on 10,10′-oxydiphenoxarsine in the GESTIS substance database of the IFA , accessed on July 10, 2016(JavaScript required) .

[Bonnet-3] Martin Bonnet: Plastics in engineering applications: properties, processing and practical use of polymer materials. Vieweg + Teubner Verlag, 2008, ISBN 3-8348-0349-9 ( limited preview in the Google book search).

[4] Patent US3069252 : Methods for the control of the growth of plants and plant parts. Applied November 15, 1960 , published December 18, 1962 , Applicant: Dow Chemical, Inventor: John L Hardy, Melvin J Josephs. ‌

[5] Directorate-General for Health and Food Safety of the European Commission: EU pesticide database ; accessed on June 26, 2016 ..

[6] PVC Formulation 2013 ( Memento from August 18, 2013 in the Internet Archive )

[7] Patent WO2013144145 : Stable compositions of thiabendazole and iodine-containing fungicides. Registered on March 26, 2013 , published on October 3, 2013 , applicant: Lanxess, inventor: Hermann Uhr, Andreas Böttcher, Thomas Jaetsch. ‌