Registration Dossier
Registration Dossier
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EC number: 204-200-0 | CAS number: 117-61-3
Endpoint summary
Administrative data
Description of key information
Additional information
Biodegradation in water:
The substance Benzidine-2,2’-disulphonic acid is 50% biodegradable in water in 38 days (half-life). This value indicates that Benzidine-2,2’-disulphonic acid is readily biodegradable in water since the half life is less than the threshold of <= 60 days (to qualify the chemical as not persistent).
Medium |
Half life in Days |
Percent in medium |
Water |
38 |
12% |
Biodegradation in Water / Sediment :
Based on the Level III Fugacity Model , the half life period of the Benzidine-2,2’-disulphonic acid was estimated.
Half life period of Benzidine-2,2’-disulphonic acid in water was observed to be 38 days while in sediment it is 340 days. Based on these half life values of it is concluded that Benzidine-2,2’-disulphonic acid is readily biodegradable in water where as it is non biodegradable in sediment. However, since there is no diffusion of the substance in the sediment as evident from the reported data (0 % in sediment) and hence persistence in the sediment compartment is not likely to be critical.
The Supporting study also indicates that half life period of Benzidine-2,2’-disulphonic acid in water and sediment as900 hrs (37.5 days) and 8100 hrs (337.5days) respectively.
Medium |
Half life in Days |
Percent in medium |
Water |
38 |
12% |
Sediment |
340 |
0% |
Media |
Half life (hrs) |
Percent in medium |
Emission (kg/hr)
|
Water |
900 |
12.3%
|
1000 |
Sediment |
8100 |
0.398%
|
0 |
Biodegradation in soil:
Based on the Level III Fugacity Model , the half life period of the Benzidine-2,2’-disulphonic acid was estimated.
Half life period of Benzidine-2,2’-disulphonic acid in soil was observed to be 75 days. Based on these half life values it is concluded that Benzidine-2,2’-disulphonic acid is not readily biodegradable (persistent) in soil since the half life period of Benzidine-2,2’-disulphonic acid exceeds the threshold of 60 days (to qualify the chemical as persistent)
The supporting study also indicates that the half life of Benzidine-2,2’-disulphonic acid to be 1800 hrs (75 days).
Medium |
Half life in Days |
Percent in medium |
Soil |
75 |
87% |
Media |
Half life (hrs) |
Percent in medium |
Emission (kg/hr)
|
Soil |
1800 |
87.3%
|
1000 |
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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