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Environmental fate & pathways

Additional information on environmental fate and behaviour

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Administrative data

Endpoint:
additional information on environmental fate and behaviour
Type of information:
experimental study
Adequacy of study:
key study
Study period:
January to May 2013
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The study was conducted non-GLP. A testing guideline was not applied.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report Date:
2013

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
Solutions of the test material at different concentrations were exposed under "clean" and "dirty" conditions for various times. At various intervals, samples were taken and submitted to chemical analysis in order to determine the decompositoin (dechlorination) of the substance. Dirty conditions simulated conditions under which disinfection is appliacalbe. They furthermore are equivalent to methods for efficacy testing.
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: liquid
Details on test material:
- Name of test material (as cited in study report): Chloramine B
- Lot/batch No.: 050125
-Packaging: PE dose 1000 g

Results and discussion

Any other information on results incl. tables

The following results were obtained:

Chloramin B (BCHA) 0,01g/L, clean conditions

Time of analyse [hour]

Start

0,5

2

5

8

21

23

30

46

51

95

97

Content of BCHA in g/L

0,0115

0,0090

0,0075

0,0062

0,0054

0,0031

0,0028

0,0024

0,0014

0,0013

0,0003

0,0002

Content of BCHA (%)

100

78,3

65,2

53,9

47,0

27,0

24,3

20,9

12,2

11,3

2,6

1,7

Chloramin B (BCHA) 0,01g/L, dirty conditions

Time of analyse [hour]

Start

0,5

2

5








Content of BCHA in g/L

0,0104

0,0002

< 0,0002

no det.








Content of BCHA (%)

100

2,7

< 2,7









Chloramin B (BCHA) 0,1g/L, clean conditions

Time of analyse [hour]

Start

0,5

2

6

8

22

26

71




Content of BCHA in g/L

0,1050

0,0994

0,0932

0,0865

0,0845

0,0683

0,0693

0,0484




Content of BCHA (%)

100

94,6

88,7

82,3

80,4

65,0

66,0

46,1




Chloramin B (BCHA) 0,1g/L, dirty conditions

Time of analyse [hour]

Start

0,5

2

6

8

14

18

26

71



Content of BCHA in g/L

0,1041

0,0705

0,0551

0,0360

0,0309

0,0094

0,0025

0,0023

< 0,0002



Content of BCHA (%)

100

67,7

52,9

34,6

29,7

9,0

2,4

2,2

< 0,2



Chloramin B (BCHA) 1g/L, clean conditions

Time of analyse [hour]

Start

0,5

2

6

8

19

29

92

124

29d

Content of BCHA in g/L

1,0296


1,0296


1,0025

1,0025

1,0025

1,0025

1,0025

0,8229

Content of BCHA (%)

100


100


97,4

97,4

97,4

97,4

97,4

79,9

Chloramin B (BCHA) 1g/L, dirty conditions

Time of analyse [hour]

Start

0,5

2

6

8

19

29

92

124

29d

Content of BCHA in g/L

1,0296


0,9212


0,8213

0,7315

0,7044

0,6232

0,5419

0,3238

Content of BCHA (%)

100


89,5


79,8

71,0

68,4

60,5

52,6

31,4

Chloramin B (BCHA) 10g/L, clean conditions

Time of analyse [hour]

Start

0,5

2

5

11

24

27

31

48

72

9 d

38 d

Content of BCHA in g/L

10,162


10,162

10,162

10,162

10,162

10,162

10,162

10,162

10,162

9,982

9,131

Content of BCHA (%)

100


100

100

100

100

100

100

100

100

98,2

89,9

Chloramin B (BCHA) 10g/L, dirty conditions

Time of analyse [hour]

Start

0,5

2

5

11

24

27

31

48

72

38 d

Content of BCHA in g/L

10,162


10,117

10,072

10,027

9,937

9,937

9,891

9,801

9,666

8,636

Content of BCHA (%)

100


99,6

99,1

98,7

97,8

97,8

97,3

96,4

95,1

85,0

Chloramin B (BCHA) 20g/L, clean conditions

Time of analyse [hour]

Start

0,5

2

5

11

24

27

31

48

72


Content of BCHA in g/L

20,086


20,086

20,086

20,086

20,086

20,086

20,086

20,086

20,086


Content of BCHA (%)

100


100

100

100

100

100

100

100

100


Chloramin B (BCHA) 20g/L, dirty conditions

Time of analyse [hour]

Start

0,5

2

5

11

24

27

31

48

72


Content of BCHA in g/L

20,086


20,074

20,069

20,022

20,001

19,998

19,974

19,901

19,889


Content of BCHA (%)

100


99,9

99,9

99,7

99,6

99,6

99,4

99,1

99,0


Chloramin B (BCHA) 50g/L, clean conditions

Time of analyse [hour]

Start

0,5

2

5

11

24

27

31

48

72


Content of BCHA in g/L

49,998


49,998

49,998

49,998

49,998

49,998

49,998

49,998

49,998


Content of BCHA (%)

100


100

100

100

100

100

100

100

100


Chloramin B (BCHA) 50g/L, dirty conditions

Time of analyse [hour]

Start

0,5

2

5

11

24

27

31

48

72


Content of BCHA in g/L

49,998


49,997

49,991

49,876

49,801

49,706

49,665

49,611

49,599


Content of BCHA (%)

100


100

100

99,8

99,6

99,4

99,3

99,2

99,2




Applicant's summary and conclusion

Conclusions:
A 90% dechlorination under realistic application conditions was verified in 0.01 and 0.1 g/L aqueous solutions within 0.5 and 14 hours, respectively. At an initial concentration of 0.01 g/L, the substance was not detectable after 5 hours of exposure to "dirty" conditions. Chloramin B in higher concentrations 1-50g/L however was rather stable even under dirty conditions.
Executive summary:

In a non-GLP study, aqueous solutions (application solutions) of the test material at concentrations 0.01, 0.1, 1, 10, 20 and 50 g/L were exposed to „clean“ and „dirty“ conditions. „Clean” conditions: 1 L of the Chloramin B application solution, 0,3 g Albumin (Adult Bovine Serum, Lot B01110-2358); “Dirty” conditions: 1 L of Chloramin B application solution, 3 g Albumin (Adult Bovine Serum, Lot B01110-2358), 3 ml sheep erythrocytes. The “dirty” conditions were meant to simulate situations, were disinfection measures are required. The “dirty” conditions are equivalent to the conditions for efficacy testing of disinfectants. Samples were taken at regular intervals (hours and days) in order to measure the decomposition/dechlorination of the test material. The following analytical methods were applied: A validatedHPLC Method for the concentration 0.01 and 0.1 g/L and a validated iodometric titration methodfor the concentrations1 – 50 g/L. The measurements showed that at an initial concentration of 0.01 g/L, the substance was not detectable after 5 hours of exposure to "dirty" conditions.

A 90% dechlorination under realistic "dirty" application conditions was verified in 0.01 and 0.1 g/L aqueous solutions within 0.5 and 14 hours, respectively. Dechlorination in clean solutions was longer, i.e. 90% of 0.01 g/L solution were dechlorinated within 95 hours and abolut 50% of 0.1 g/l solutoin within 71 hours. Chloramin B in higher concentrations 1 -50g/L however was rather stable even under “dirty” conditions. Taking into consideration that during its way to the STP Chloramine B is diluted with the other waste waters - highly contaminated with bacteria and organic materials - and that a worst case dilutions factor of 500 (50 g/L time 0.1 g/L) is very realistic, it can be concluded that no Chloramine B is reaching the STP but its dechlorinated form – benzenesulphonamide.