Registration Dossier
Registration Dossier
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EC number: 223-267-7 | CAS number: 3794-83-0
Phototransformation in air
Administrative data
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- documentation insufficient for assessment
Data source
Reference
- Reference Type:
- publication
- Title:
- Properties of Hydroxyethane Diphosphonate affecting its Environmental Fate: Degradability, Sludge Adsorption, Mobility in Soils, and Bioconcentration
- Author:
- Steber, J. and Wierich, P.
- Year:
- 1 986
- Bibliographic source:
- Chemosphere 15:7 (1986), 929-945
Materials and methods
Test material
- Reference substance name:
- Disodium dihydrogen (1-hydroxyethylidene)bisphosphonate
- EC Number:
- 231-025-7
- EC Name:
- Disodium dihydrogen (1-hydroxyethylidene)bisphosphonate
- Cas Number:
- 7414-83-7
- Molecular formula:
- C2H8O7P2.2Na
- IUPAC Name:
- disodium dihydrogen (1-hydroxyethane-1,1-diyl)bis(phosphonate)
- Test material form:
- not specified
Constituent 1
Results and discussion
Any other information on results incl. tables
Exposure of 14C-HEDP in sterile mineral salts medium
resulted in production of only small amounts of 14CO2 but of
considerable amounts of 14C-labelled products which could be
mineralized very quickly following bacterial inoculation and
subsequent dark incubation (post-incubation). The abiotic
transformation of HEDP to biodegradable products increased
with exposure time.
HPLC analysis of exposed test solutions showed that acetate
was the biodegradable product formed by photodegradation of
HEDP. The amount of 14C-acetate (as % of initial
radioactivity) found after exposure of 14C-HEDP in sterile
solutions corresponded very well to the 14CO2 evolved after
bacterial inoculation and subsequent dark incubation
(post-incubation). On the other hand, the amount of
residual
14C-HEDP after exposure was quantitatively comparable with
the 14C-radioactivity remaining in solution after
post-incubation.
Applicant's summary and conclusion
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