Pentacarbonyliron

Hydrolysis

Administrative data

Endpoint:

hydrolysis

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Guideline study with acceptable restrictions

Data source

Reference

Reference 1

Reference Type:

study report

Title:

Unnamed

Year:

2007

Report date:

2007

Reference 2

Reference Type:

study report

Title:

Unnamed

Year:

2007

Report date:

2007

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 111 (Hydrolysis as a Function of pH)

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Pentacarbonyliron

EC Number:

236-670-8

EC Name:

Pentacarbonyliron

Cas Number:

13463-40-6

Molecular formula:

C5FeO5

IUPAC Name:

pentacarbonyliron

Details on test material:

- Analytical purity: 99.95%

Radiolabelling:

no

Study design

Analytical monitoring:

yes

Details on sampling:

- Sampling intervals for the parent/transformation products: ca. 1-3h
- Sampling intervals/times for pH measurements: measurment at the beginning and end of experiment
- Other observation, if any (e.g.: precipitation, color change etc.):
pH4: little, brown precipitation was observed at the end of the experiment
pH10: markedly brown precipitation was observed at the end of the experiment

Details on test conditions:

TEST SYSTEM
- Type, material and volume of test flasks, other equipment used: abiotic, volumes of measuring chambers: pH4) 195.8 cm3, pH 6.3) 200.8 cm3, pH 10) 191.4cm3
- Measures taken to avoid photolytic effects: darkened measuring chamber
- Measures to exclude oxygen: closed, pressure tight measuring chamber
- Details of traps for volatile, if any: no data
- If no traps were used, is the test system closed/open: closed
- Is there any indication of the test material adsorbing to the walls of the test apparatus?: no
TEST MEDIUM
- Volume used/treatment: 100 ml
- Kind and purity of water: HPLC gradient grade, CAS: 7732-18-5, Fisher Scientific
- Preparation of test medium: heterogenous mixture was achieved by slowly stirring (0.1g pentacarbonyliron / 100 g Water)
- Renewal of test solution: no
- Identity and concentration of co-solvent: no co-solvent
OTHER TEST CONDITIONS
- Adjustment of pH: yes, at the beginning of the experiment
- Dissolved oxygen: no data

Duration of test

Duration of test 1

Duration:

474.8 h

pH:

4

Temp.:

21.9

Initial conc. measured:

ca. 45 mg/L

Duration of test 2

Duration:

477.5 h

pH:

6.3

Temp.:

25

Initial conc. measured:

ca. 39 mg/L

Duration of test 3

Duration:

474.8 h

pH:

10

Temp.:

21.9

Initial conc. measured:

ca. 45 mg/L

Positive controls:

not specified

Negative controls:

not specified

Results and discussion

Transformation products:

yes

Dissipation DT50 of parent compound

Dissipation DT50 of parent compound 1

pH:

4

Temp.:

25 °C

DT50:

180 h

St. dev.:

20

Type:

(pseudo-)first order (= half-life)

Dissipation DT50 of parent compound 2

pH:

6.3

Temp.:

25 °C

DT50:

160 h

St. dev.:

20

Type:

(pseudo-)first order (= half-life)

Dissipation DT50 of parent compound 3

pH:

10

Temp.:

25 °C

DT50:

170 h

St. dev.:

20

Type:

(pseudo-)first order (= half-life)

Details on results:

TEST CONDITIONS
- pH, sterility, temperature, and other experimental conditions maintained throughout the study: No
- Anomalies or problems encountered: pH10: the pH dropped from originally 10 to pH 7.2 in the course of the experiment