Phenylphosphonic dichloride

Hydrolysis

Administrative data

Endpoint:

hydrolysis

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2018

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference

Reference Type:

other company data

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Qualifier:

equivalent or similar 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:

Phenylphosphonic dichloride

EC Number:

212-534-3

EC Name:

Phenylphosphonic dichloride

Cas Number:

824-72-6

Molecular formula:

C6H5Cl2OP

IUPAC Name:

phenylphosphonic dichloride

Test material form:

liquid

Radiolabelling:

no

Study design

Analytical monitoring:

no

Estimation method (if used):

pH and conductivity measurements of BPOD in water

Duration of test

Duration:

4 h

pH:

1.6

Temp.:

23 °C

Initial conc. measured:

1.82 g/L

Positive controls:

no

Negative controls:

no

Results and discussion

Transformation products:

not measured

Any other information on results incl. tables

BPOD-Lösung 1 ml in 900ml H2O (Dest.) 23°C

Verlauf über 60 Sekunden

Sekunde	pH	Temp.	pH	Temp.
0	8,6	23	8,9	23
10	3,2	23	2,8	23
20	2,5	23	1,7	23
30	2,1	23	1,6	23
40	1,9	23	1,6	23
50	1,7	23	1,6	23
60	1,6	23	1,6	23
70	1,6	23	1,6	23
80	1,6	23	1,6	23
90	1,6	23	1,6	23
100	1,6	23	1,6	23

BPOD-Lösung 1 ml in 900ml H2O (Dest.) 23°C

Verlauf über längeren Zeitraum

Nr.	Zeit	Zeit [min.]	pH	Leit. [µS/cm]	Temp.
1	0 Sec.	0	9,7	6,2	23,0
2	10 Sec.	0,17	2,8	1125	23,0
3	20 Sec.	0,33	2,4	1913	23,0
4	30 Sec.	0,5	2,2	2705	23,0
5	40 Sec.	0,67	2,0	3804	23,0
6	50 Sec.	0,83	1,9	4460	23,0
7	60 Sec.	1	1,8	5290	23,0
8	70 Sec.	1,17	1,8	5590	23,0
9	80 Sec.	1,33	1,8	5900	23,5
10	90 Sec.	1,5	1,7	6370	23,5
11	100 Sec.	1,67	1,6	6570	23,5
12	5 Min.	5	1,6	7900	23,5
13	10 Min.	10	1,6	8180	23,5
14	30 Min.	30	1,6	8240	24,0
15	1 h	60	1,6	8360	25,0
16	2 h	120	1,6	8550	22,5
17	3 h	180	1,6	8650	22,0
18	4 h	240	1,6	8690	22,0
19	Nächter Tag		1,6	8430	20,0

Applicant's summary and conclusion

Validity criteria fulfilled:

not applicable

Conclusions:

The reaction of phenylphosphonic dichloride and water was studied by bringing a small amount of neat phenylphosphonic dichloide into contact with an excess of well stirred water and following the generation of acidic reaction products using a pH electrode. After 60 seconds the pH remained constant at 1.6.
The half life of phenylphosphonic dichloride in water at 23 °C was estimated to be < 60 seconds.

Executive summary:

The reaction of phenylphosphonic dichloride and water was studied by bringing a small amount of neat phenylphosphonic dichloide into contact with an excess of well stirred water and following the generation of acidic reaction products using a pH electrode. After 60 seconds the pH remained constant at 1.6.

The half life of phenylphosphonic dichloride in water at 23 °C was estimated to be < 60 seconds.