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EC number: 204-854-7 | CAS number: 127-65-1
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
- Endpoint:
- bioaccumulation in aquatic species: fish
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1991
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Remarks:
- Exposure period is one our and therefore no equilibrium is achieved but due to the readily biodegradability of both Chloramine T and p-TSA it is very unlikely that this would have been easy to obtain. From the uptake and depuration rates a reliable worst-case BCF was calculated. This test was performed in order to establish residues of Chloramine-T trihydrate in fish that are meant for consumption and not according standard guidelines like OECD 305. Despite of the different setup of the test a reliable kinetic BCF for p-TSA equivalent residues could be derived.
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- No reference is made to a standard guideline, test performed to establish residue concentrations in exposed animals
- GLP compliance:
- yes
- Remarks:
- according to US FDA principles of GLP
- Radiolabelling:
- yes
- Vehicle:
- no
- Test organisms (species):
- Oncorhynchus mykiss (previous name: Salmo gairdneri)
- Details on test organisms:
- Rainbow trout (Oncorhynchus mykiss) obtained as eyed eggs were reared in the laboratory. Fingerlings (1.82-4.50 g) and juvenile trouts (36.1-88.7 g) were used in this study. The test animals were selected for the study without regard to sex. The animals were acclimated for at least 7 days in a 495L fibreglass tank under flow through conditions at a temperature of 12° C and photoperiod of 12:12>.
Diet: Animals were fed commercial trout food (Nelson’s Sterling Silver Cup Salmon Food, Murray Elevators, Murray, UT)( the feed was analysed for environmental contaminants and these were below those known to interfere with similar studies in mammals). Fingerlings received 3.9% of bw and juvenile fish received 2.0% of bw. The animals were not fed 1 day before the study commenced and was provided again during the recovery phase. - Route of exposure:
- aqueous
- Test type:
- static
- Water / sediment media type:
- natural water: freshwater
- Total exposure / uptake duration:
- 60 min
- Test temperature:
- 11 -7°C (11.3-12.0) during the depuration phase for fingerling fish
11.8°C (11.6-12.2) during the depuration phase for juvenile fish - pH:
- 8.09 (7.87-8.16) during the depuration phase for fingerling fish
7.95 (7.63-8.07) during the depuration phase for juvenile fish - Dissolved oxygen:
- 10.0 mg/L (9.74-10.2) ; percent saturation of oxygen, 93.7% (90.8-95.0) during the depuration phase for fingerling fish
9.21 mg/L (7.75-9.62) ; percent saturation of oxygen, 87.3% (73.8-91.6) during the depuration phase for juvenile fish - Details on test conditions:
- Exposure groups:
Separate groups of fingerling and juvenile rainbow trout were allowed to acclimate to conditions in the environmental chamber for at least 1 week before testing. Accumulation and elimination of Chloramine-T from the two-size classes of fish was determined in four separate experiments. The first two documented accumulation and elimination in fingerlings , the second two documented accumulation and elimination in juveniles. Exposures to solutions of [14C]Chloramine-T were made in large (60 L) stainless steel exposure tanks for up to 1 hour. Chloramine-T accumulation was assessed by exposing 48 finger1ings in two tanks (four groups of 12 fish each) and 40 juveniles (10 fish in each of four tanks; four groups of 10 fish) by static bath to solutions of [14C]Chloramine-T.
Four groups (12 fish per group for fingerlings; 10 fish per group for juveniles) were removed from the exposure tanks, one group at each 15-min interval through the hour of exposure.
Control groups for each fish size were sampled before the exposure. The rates of residue elimination were assessed by exposing 108 fingerlings in
one tank (12 fish per group x nine groups) and 72 juvenile fish in three tanks (24 fish/ tank) by static bath to a solution of [14C]Chloramine-T for
1 hour. After the 1-hour exposure, fish were removed from the exposure, tanks, placed in a fresh water rinse, and then randomly transferred to one of six 48-L glass-holding aquaria that were supplied with fresh, flowing (1 L/min; >one tank exchange/hour) water and held until the animals were sampled. The calculated concentration of [14C]Chloramine-T in each exposure tank was 20 mg/L, twice the treatment concentration proven to be effective in controlling disease agents responsible for bacterial gill disease (BGD). The loading rate for any single exposure did not exceed 15 g of fish per liter of test solution. Previous studies indicated that this loading rate was proper to maintain adequate concentrations of dissolved oxygen (≥ 7.0 mg/L) in the test water during a 1-hour exposure. Test water was aerated for at least 1 hour before addition of the chemical; tanks were not aerated during the exposures. Holding aquaria were cleaned and observations of activity and food consumption were made daily for all test groups. Temperature, pH, conductivity, and dissolved oxygen concentration were monitored in the recovery water throughout the depuration phase of the study using a Hydrolab Scout water quality analysis system.
The remaining fish from each group were pooled and homogenized. These samples were stored at -20 °C until LSC and HPLC analysis.
Samples of exposure eater were collected every 10 minutes during each 1 hour exposure period and analysed for radioactivity by LSC and for the concentrations of Chloramine-T and PTSA by HPLC. - Nominal and measured concentrations:
- The exposure concentration found by radiochemical analysis in the water samples from all test baths (n=10) was initially 17 mg/L after 60 min the concentration remained above 16 mg/L. HPLC analysis gave a concentration of 19 mg/L which decrease to 18 mg/L after 60 minutes.
Simultaneous analysis of the exposure water for Chloramine-T and its primary decomposition product, p-TSA, indicated that p-TSA was present in a1l exposure waters immediately following the addition of [14C]Chloramine-T (average concentration was 0.76 ± 0.08 mg/L) . Its concentration gradually increased during the 60-min exposures to an average of 1.30 ± 0.25 mg/L. The sum of the Chloramine-T concentration and p-TSA concentration converted to Chloramine-T equivalents in the test water was approximately 20 mg/L.
Residues of Chloramine-T were not observed in any of the fish tissues analyzed for this study. Chloramine-T was apparently rapidly reduced to the primary decomposition product, p-TSA. Therefore, all tissue residues determined either by radiometric or by HPLC methods were reported on the basis of equivalent concentrations of p-TSA. - Reference substance (positive control):
- no
- Key result
- Conc. / dose:
- 20 mg/L
- Temp.:
- 11.8 °C
- pH:
- 8
- Type:
- BCF
- Value:
- 2.2 dimensionless
- Basis:
- whole body w.w.
- Calculation basis:
- other: K1/K2 ratio
- Remarks:
- based on LSC concentrations
- Metabolites:
- Findings, disparity between radiometric and HPLC analysis, suggested that other metabolites besides PTSA are present in the tissues.
Data were evaluated as a percent of the HPLC to LSC concentrations; percentages less than 100% were assumed to indicate the presence of an additional metabolite(s) of Chloramine-T in the tissues.
The values of HPLC-concentration calculated as a percent of LSC concentration were least during the accumulation phase of the study, suggesting that a metabolite was formed almost immediately after the initial exposure. The percentage decreased slightly during the accumulation phase of the study in both fingerling and juvenile fish. Percentages increased toward 100% in all tissues during the elimination phase of the study. It was attempted to identify the other metabolites and one peak was found. Since Chloramine-T is a mild oxidizing agent, the metabolite may be a complex or conjugate with a tissue antioxidant such as glutathione. Such a metabolite would be expected to occur in highest concentrations during and immediately after exposure and decrease there after.
1994 study:
In a follow up study rainbow trout were exposed to 20 mg/L Chloramine-T for 60 ± 3 minutes. Samples of fillet tissue, residual carcass, and gall bladder bile were homogenized and analyzed for radioactive residues by gradient high performance liquid chromatography (HPLC) equipped with in-1ine radio chromatography detection. As expected residues of Chloramine-T were not observed in any of the fish tissues analyzed. However in this second study, there was no evidence of any residues other than PTSA in any of the tissues analyzed, even when multiple extracts were pooled and analyzed to increase the sensitivity. Samples of archived tissue from the previous residue study were extracted and analyzed using procedures from the present study and the unidentified residue was confirmed. Concurrent purity analyses of the test articles from the previous and the present studies indicated that the test article from the previous study contained a radioactive contaminant that accounted for approximately 5% of the total radioactivity of the sample. We feel that the unidentified residue from the previous study was an anomaly that resulted from the presence of an impurity in the original test article. - Validity criteria fulfilled:
- not applicable
- Conclusions:
- The test data show that for p-TSA equivalent residues a worst-case bioconcentration factor of 2.2 was derived using fingerling fish and the p-TSA equivalent concentration. Based on the rapid transformation and low log Pow, Chloramine T has a low bioaccumulation potential.
- Executive summary:
Chloramine T was not found in any of the fish tissues analyzed in this study, rather the reduction product p-TSA was present.
No Steady-state p-TSA equivalent residue concentration was achieved within the accumulation period considered (i.e. 60 minutes). The tissue-equivalent concentrations of p-TSA in whole-body homogenates were significantly greater (P<0.05) in fingerlings than in juveniles.
The p-TSA equivalent concentration in composite whole body homogenate samples from fingerlings was 0.98 µg/g after the 60 minutes exposure, a value that was only about 5% of the concentration in the exposure water. From this 0.98 µg/g p-TSA equivalent only 0.36 µg/g was p-TSA.
The kinetic whole body BCF as calculated from the accumulation and depuration from fingerling half-lives using the p-TSA equivalent concentration (worst-case). The k1/k2 ratio as calculated according to OECD guideline 305 is 2.2 based on LSC. It should be noted that this ratio must be considered as a worst-case value because it is calculated using the p-TSA equivalent concentration for fingerlings, using the average depuration rate during the whole curve expressed in relation to the whole body. Lower ratios would be obtained if the data for juvenile rainbow trout would have been used. Based on the measured log Pow values for Chloramine T and p-TSA, Chloramine T will have a lower BCF than pTSA.
Reference
Chloramine T was not found in any of the fish tissues analyzed in this study, rather the reduction product p-TSA was present.
No Steady-state p-TSA equivalent residue concentration was achieved within the accumulation period considered (i.e. 60 minutes). The tissue-equivalent concentrations of p-TSA in whole-body homogenates were significantly greater (P<0.05) in fingerlings than in juveniles.
The p-TSA equivalent concentration in composite whole body homogenate samples from fingerlings was 0.98µg/g after the 60 minutes exposure, a value that was only about 5% of the concentration in the exposure water. From this 0.98 µg/g p-TSA equivalent only 0.36 µg/g was p-TSA.
The kinetic whole body BCF as calculated from the accumulation and depuration from fingerling data using the p-TSA equivalent concentration (worst-case) is 2.19. It should be noted that this ratio must be considered as a worst-case value because it is calculated using the p-TSA equivalent concentration for fingerlings, using the average depuration rate during the whole curve expressed in relation to the whole body. Lower ratios would be obtained if the data for juvenile rainbow trout would have been used. Based on the measured log Pow values for Chloramine T and p-TSA, Chloramine T will have a lower BCF than pTSA.
HPLC
Depuration:
LSC: Log C = -0.011 * time – 0.3091 (r = 0.9794)
K2 = LN(10)* slope = 0.0253hours -1
T½ = LN(2)/ K = 27.4 hours
HPLC: Log C = -0.0081 * time – 0.6277 (r = 0.9840)
K2 = LN(10)* slope = 0.0187 hours -1
T½ = LN(2)/ K = 37.0 hours
DT90:
The initial mean p-TSA equivalent concentration in fingerlings after 1 hour of uptake = 0.26 µg/g. After 120 hours of depuration this concentration has dropped to 0.03 µg/g
Uptake:
K1 = (Cf * K2)/Cw * (1 – e^(-K2*t)))
Cw = 19 µg/L (on average taken from appendix 9)
Cf LSC = 0.549 µg/g based on graph after 0.525 hours
Cf HPLC = 0.176 µg/g based on graph after 0.525 hours
K1 LSC = 0.0554 hours-1
K1HPLC = 0.0177 hours-1
BCF LSC = K1/K2 = 2.19
BCF HPLC = 0.95
The depuration was observed during 240 hours. No residues remained after this depuration time. About 90% removal was observed after 120 hours of depuration.
Description of key information
Chloramine T was not found in any of the fish tissues analyzed in this study, rather the reduction product p-TSA was present.
No Steady-state p-TSA equivalent residue concentration was achieved within the accumulation period considered (i.e. 60 minutes). The tissue-equivalent concentrations of p-TSA in whole-body homogenates were significantly greater (P<0.05) in fingerlings than in juveniles.
The p-TSA equivalent concentration in composite whole body homogenate samples from fingerlings was 0.98 µg/g after the 60 minutes exposure, a value that was only about 5% of the concentration in the exposure water. From this 0.98 µg/g p-TSA equivalent only 0.36 µg/g was p-TSA.
The kinetic whole body BCF as calculated from the accumulation and depuration from fingerling half-lives using the p-TSA equivalent concentration (worst-case). The k1/k2 ratio as calculated according to OECD guideline 305 is 2.2 based on LSC. It should be noted that this ratio must be considered as a worst-case value because it is calculated using the p-TSA equivalent concentration for fingerlings, using the average depuration rate during the whole curve expressed in relation to the whole body. Lower ratios would be obtained if the data for juvenile rainbow trout would have been used. Based on the measured log Pow values for Chloramine T and p-TSA, Chloramine T will have a lower BCF than pTSA.
Key value for chemical safety assessment
- BCF (aquatic species):
- 2.2 dimensionless
Additional information
Also log Kow testing has been performed. The test substance is not stable in when brought into contact with solvents. The test as performed by Heus is not performed according to OECD guideline 107. However, the value obtained (-1.3) is in good agreement with the calculated Log Kow value of 0.5 (EPIsuite v3.20). Both figures additionally show that Chloramine T has a very low bioaccumulation potential.
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