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EC number: 209-798-7 | CAS number: 593-56-6
- 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
Endpoint summary
Administrative data
Key value for chemical safety assessment
- Toxic effect type:
- dose-dependent
Effects on fertility
Description of key information
No reliable data are available for the test substance. The toxicological assessment is based on read-across to CAS 10039-54-0.
non-guideline study, GLP, oral, rat, 90 d: NOAEL fertility (based on reproductive organ examinations) = 21 mg/kg bw/day (highest tested dose); NOAEL systemic adverse effects = 0.9 mg/kg bw/d
Link to relevant study records
- Endpoint:
- toxicity to reproduction
- Remarks:
- other: Screening for reproductive toxicity (fertility)
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Results on reproductive organs are part of a 3 month repeated dose study
- Reason / purpose for cross-reference:
- reference to same study
- Principles of method if other than guideline:
- Examination of male and female reproductive organs was part of a 3 month repeated dose study.
- GLP compliance:
- yes
- Species:
- rat
- Strain:
- Wistar
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Dr. Karl Thomae GmbH, Biberach a.d. Riss, Germany
- Age at study initiation: 42 days
- Average weight at study initiation: males ca. 117 g; females ca. 136 g
- Housing: individually in V2A wire mesh cages, type DK III (Becker & Co. Castrop-Rauxel, Germany)
- Diet: Kliba-Haltungsdiaet Ratte/Maus/Hamster 343 Mehl (Klingentalmuehle AG, Kaiseraugst, Switzerland), ad libitum
- Water: Milli-Q-Reinstwasser, ad libitum
- Acclimation period: 7 days
ENVIRONMENTAL CONDITIONS
- Temperature: 20 - 24 °C
- Humidity: 30 - 70 %
- Air changes: fully air-conditioned rooms
- Photoperiod: 12 hrs dark / 12 hrs light - Route of administration:
- oral: drinking water
- Vehicle:
- other: Mili-Q extra pure water
- Details on exposure:
- Wistar rats (10 animals/sex/dose group) had been exposed via drinking water for over 3 months at concentrations of 10, 50, and 250 ppm according to dose levels of about 0.9, 4, and 21 mg/kg bw/d.
- Analytical verification of doses or concentrations:
- yes
- Details on analytical verification of doses or concentrations:
- For homogeneity and concentration control analyses, each samples of all concentrations were drawn at the start of the study, after 6 weeks and towards at the end of the administration period after 12 weeks of the study. The analysis of the amount of the test material in the drinking water was determined by photometry.
- Duration of treatment / exposure:
- Exposure period: 90 d
- Frequency of treatment:
- ad libitum
- Dose / conc.:
- 250 mg/L drinking water
- Remarks:
- ca. 21 mg/kg bw/day
- Dose / conc.:
- 50 mg/L drinking water
- Remarks:
- ca. 4 mg/kg bw/day
- Dose / conc.:
- 10 mg/L drinking water
- Remarks:
- ca. 0.9 mg/kg bw/day
- No. of animals per sex per dose:
- 10
- Control animals:
- yes, concurrent vehicle
- Details on study design:
- - Dose selection rationale: pretests
- Parental animals: Observations and examinations:
- CAGE SIDE OBSERVATIONS: Yes
- Time schedule: daily
DETAILED CLINICAL OBSERVATIONS: Yes
- Time schedule: daily
BODY WEIGHT: Yes
- Time schedule for examinations: weekly - Sperm parameters (parental animals):
- Parameters examined in male parental generations: testis weight
- Clinical signs:
- no effects observed
- Dermal irritation (if dermal study):
- not examined
- Mortality:
- no mortality observed
- Body weight and weight changes:
- no effects observed
- Food consumption and compound intake (if feeding study):
- not examined
- Food efficiency:
- not examined
- Water consumption and compound intake (if drinking water study):
- not examined
- Ophthalmological findings:
- not examined
- Haematological findings:
- not examined
- Clinical biochemistry findings:
- not examined
- Endocrine findings:
- not examined
- Urinalysis findings:
- not examined
- Behaviour (functional findings):
- not examined
- Immunological findings:
- not examined
- Organ weight findings including organ / body weight ratios:
- no effects observed
- Histopathological findings: non-neoplastic:
- no effects observed
- Histopathological findings: neoplastic:
- no effects observed
- Reproductive function: oestrous cycle:
- not examined
- Reproductive function: sperm measures:
- not examined
- Reproductive performance:
- not examined
- Dose descriptor:
- NOAEL
- Remarks:
- general toxicity
- Effect level:
- 0.9 mg/kg bw/day (nominal)
- Based on:
- test mat.
- Sex:
- male/female
- Basis for effect level:
- haematology
- organ weights and organ / body weight ratios
- histopathology: non-neoplastic
- Dose descriptor:
- NOAEL
- Remarks:
- reproductive organs
- Effect level:
- >= 21 mg/kg bw/day
- Sex:
- male/female
- Basis for effect level:
- other: No interference of the test material with reproductive organ weights and morphological integrity
- Remarks on result:
- not measured/tested
- Reproductive effects observed:
- not specified
- Conclusions:
- The test substance does not interfere with reproductive organ weights and morphological integrity at dose levels of up to and including 250 ppm according to a daily intake of approximately 21 mg/kg bw/day . The NOAEL for systemic adverse effects of this study was 0.9 mg/kg bw/d for both sexes based on findings of hemolytic anemia with methemoglobinemia and changes in organ weight as well as histopathological changes in spleen and liver at higher dosages.
- Executive summary:
Informations related to reproductive organs can be derived from the data of this repeated dose toxicity study, during which Wistar rats (10 animals/sex/dose group) had been exposed to hydroxylammonium sulfate (purity > 99%) via drinking water for over 3 months at concentrations of 10, 50, and 250 ppm according to dose levels of about 0.9, 4, and 21 mg/kg bw/d . Organ weight determinations of testes at all dose levels as well as macro- and microscopic evaluations of the testes at the highest dose level (250 ppm) had been performed for the male sex, whereas with females only macro- and microscopic evaluations had been performed for the uterus and the ovary at the highest dose level (250 ppm). At the end of the study for neither of these parameters any substance related changes could be detected. It is concluded from this study that the test substance does not interfere with reproductive organ weights and morphological integrity at dose levels of up to and including 250 ppm according to a daily intake of approximately 21 mg/kg bw (NOAEL). The NOAEL for systemic adverse effects of this study was 0.9 mg/kg bw/d for both sexes based on findings of hemolytic anemia with methemoglobinemia and changes in organ weight as well as histopathological changes in spleen and liver at higher dosages.
Reference
Within the scope of a 90 days study, absolute and relative weights of testes were examined. In treated animals, they were not different from the control, while there was a distinct morphologic response in the spleen, indicating that critical doses were exceeded. There were no treatment-related macroscopic changes in the testes. Ovaries were not considered.
Effect on fertility: via oral route
- Endpoint conclusion:
- no adverse effect observed
- Dose descriptor:
- NOAEL
- 21 mg/kg bw/day
- Study duration:
- subchronic
- Species:
- rat
- Quality of whole database:
- The quality of the whole database is high
Effect on fertility: via inhalation route
- Endpoint conclusion:
- no study available
Effect on fertility: via dermal route
- Endpoint conclusion:
- no study available
Additional information
No reliable data are available for the test substance. The toxicological assessment is based on read-across to CAS 10039-54-0.
Informations related to reproductive organs can be derived from the data of this repeated dose toxicity study (similar to OECD 408, GLP, reliability 2), during which Wistar rats (10 animals/sex/dose group) had been exposed to hydroxylammonium sulfate (purity > 99%) via drinking water for over 3 months at concentrations of 10, 50, and 250 ppm according to dose levels of about 0.9, 4, and 21 mg/kg bw/d. Organ weight determinations of testes at all dose levels as well as macro- and microscopic evaluations of the testes at the highest dose level (250 ppm) had been performed for the male sex, whereas with females only macro- and microscopic evaluations had been performed for the uterus and the ovary at the highest dose level (250 ppm). At the end of the study for neither of these parameters any substance related changes could be detected. It is concluded from this study that the test substance does not interfere with reproductive organ weights and morphological integrity at dose levels of up to and including 250 ppm according to a daily intake of approximately 21 mg/kg bw (NOAEL). The NOAEL for systemic adverse effects of this study was 0.9 mg/kg bw/d for both sexes based on findings of hemolytic anemia with methemoglobinemia and changes in organ weight as well as histopathological changes in spleen and liver at higher dosages.
Effects on developmental toxicity
Description of key information
No reliable data are available for the test substance. The toxicological assessment is based on read-across to CAS 10039-54-0.
OECD 414, GLP, rat, oral, reliability 1: NOAEL teratogenicity = 20 mg/kg bw/day (highest tested dose); NOAEL maternal toxicity = 3 mg/kg bw/day
Link to relevant study records
- Endpoint:
- developmental toxicity
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- 27. Apr 1993 - 24. May 1993
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- GLP compliant
- Reason / purpose for cross-reference:
- reference to other study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 414 (Prenatal Developmental Toxicity Study)
- Version / remarks:
- May 1981
- GLP compliance:
- yes
- Species:
- rat
- Strain:
- Wistar
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Karl THOMAE, Biberach an der Riss, Germany
- Age at study initiation: 76 99 days
- Weight at study initiation: 248 g (average)
- Housing: singly in type DK III stainless steel wire mesh cages (floor area about 800 cm2) .
- Diet: ground Kliba 343 feed rat/mouse/hamster supplied by KLINGENTALMUEHLE AG, Switzerland, ad libitum
- Water: tap water quality from water bottles, ad libitum
- Acclimation period: at least 5 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20 - 24°C
- Humidity (%): 30 - 70 %
- Photoperiod: 12 hrs dark / 12 hrs light - Route of administration:
- oral: gavage
- Vehicle:
- other: Milli-Q-water
- Analytical verification of doses or concentrations:
- yes
- Details on analytical verification of doses or concentrations:
- Analyses of the test substance:
Analytical determinations of the purity of the test substance itself were carried out before the beginning of the study (method: potentiographic titration). The stability of the test substance was proven by reanalysis. - Details on mating procedure:
- - Impregnation procedure: cohoused
- If cohoused:
- M/F ratio per cage: 1/1-4
- Length of cohabitation: from about 16.00 hours to about 7.30 hours on the following day.
- Verification of same strain and source of both sexes: yes
- Proof of pregnancy: sperm in vaginal smear referred to as day 0 of pregnancy - Duration of treatment / exposure:
- day 6 - 15 p.c.
- Frequency of treatment:
- 10x by gavage
- Duration of test:
- 20 days
- Dose / conc.:
- 1 mg/kg bw/day (actual dose received)
- Dose / conc.:
- 3 mg/kg bw/day (actual dose received)
- Dose / conc.:
- 10 mg/kg bw/day (actual dose received)
- Dose / conc.:
- 20 mg/kg bw/day (actual dose received)
- No. of animals per sex per dose:
- 25 (females)
- Control animals:
- yes, concurrent vehicle
- Details on study design:
- - Dose selection rationale:
Dose selection: In a pre-study it became obvious that the test substance caused clear signs of maternal toxicity at 30 and 15 mg/kg bw/day (hemolytic anemia).
Therefore, 20 mg was chosen as the upper dose. - Maternal examinations:
- CAGE SIDE OBSERVATIONS: Yes
- Time schedule: at least once a day
DETAILED CLINICAL OBSERVATIONS: Yes
- Time schedule: The animals were examined for clinical symptoms at least once a day, or more often when clinical signs of toxicity were elicited.
BODY WEIGHT: Yes
- Time schedule for examinations: All animals were weighed on days 0, 1, 3, 6, 8, 10, 13, 15, 17 and 20 p.c.
POST-MORTEM EXAMINATIONS: Yes
- Sacrifice on gestation day # 20
- Organs examined: gross pathology, weight of spleen was recorded.
- Ovaries and uterine content:
- The ovaries and uterine content was examined after termination: Yes
Examinations included:
- Gravid uterus weight: Yes
- Number of corpora lutea: Yes
- Number of implantations: Yes
- Number of early resorptions: Yes
- Number of late resorptions: Yes
Furthermore, calculations of conception rate and preand postimplantation losses were carried out. - Fetal examinations:
- - External examinations: Yes: all per litter
- Soft tissue examinations: Yes: half per litter
- Skeletal examinations: Yes: half per litter
- Head examinations: No data - Statistics:
- The DUNNETT-Test was used for a simultaneous comparison of several dose groups with the control. The hypothesis of equal means was tested. This test was performed two-sided and was used for the statistical evaluation of the following parameters: Food consumption, body weight, body weight change, corrected body weight gain (net maternal body weight change), weight of the uterus before it was opened, spleen weights (absolute and relative), number of corpora lutea, number of implantations, number of resorptions and number of live fetuses; proportion of preimplantation loss, postimplantation loss, resorptions and live fetuses in each litter; litter mean fetal body weight and litter mean placental weight.
FISHER's Exact Test was used for a pairwise comparison of each dose group with the control for the hypothesis of equal proportions. This test was performed one-sided and was used for female mortality, females pregnant at terminal sacrifice and the number of litters with fetal findings.
The WILCOXON-Test was used for a comparison of each dose group with the control for the hypothesis of equal medians. This test was performed one-sided and was used for the proportion of fetuses with malformations, variations, retardations and/or unclassified observations in each litter. - Historical control data:
- yes
- Clinical signs:
- no effects observed
- Dermal irritation (if dermal study):
- not examined
- Mortality:
- no mortality observed
- Body weight and weight changes:
- no effects observed
- Food consumption and compound intake (if feeding study):
- not examined
- Food efficiency:
- not examined
- Water consumption and compound intake (if drinking water study):
- not examined
- Ophthalmological findings:
- not examined
- Haematological findings:
- not examined
- Clinical biochemistry findings:
- not examined
- Endocrine findings:
- not examined
- Urinalysis findings:
- not examined
- Behaviour (functional findings):
- not examined
- Immunological findings:
- not examined
- Organ weight findings including organ / body weight ratios:
- effects observed, treatment-related
- Description (incidence and severity):
- Absolute and relative spleen weights were statistically significantly higher in the 10 and 20 mg/kg bw groups than in the control group. In the 10 mg/kg bw group the spleen weights were approx. 60% higher than the respective control values, whereas the spleen weights of the high dose group dams were nearly twice as high as in the control group. The increased spleen weights are well known substance induced effects. At the lower dose levels (1 or 3 mg/kg body weight) absolute and relative spleen weights were similar to the control weights.
- Gross pathological findings:
- effects observed, treatment-related
- Description (incidence and severity):
- At necropsy the enlargement of the spleens of all dams of test groups 10 and 20 mg/kg body weight/day is in-line with the distinct increases in absolute and relative spleen weights in these groups.
- Neuropathological findings:
- not examined
- Histopathological findings: non-neoplastic:
- not examined
- Histopathological findings: neoplastic:
- not examined
- Number of abortions:
- no effects observed
- Pre- and post-implantation loss:
- no effects observed
- Total litter losses by resorption:
- no effects observed
- Early or late resorptions:
- no effects observed
- Dead fetuses:
- no effects observed
- Changes in number of pregnant:
- not examined
- Details on maternal toxic effects:
- In the dams an enlargement of the spleens and a dose related statistically significant increase in absolute and relative spleen weights was revealed at dosages of 10 and 20 mg/kg bw/day. No substance-related effects on dams were reported for the lower dose groups. There were no substance-related differences between the groups in conception rate, the mean number of corpora lutea and implantation sites or in the values calculated for the pre- and the postimplantation losses, the number of resorptions and of viable foetuses.
- Dose descriptor:
- NOAEL
- Remarks:
- general maternal toxicity
- Effect level:
- 3 mg/kg bw/day
- Based on:
- test mat.
- Basis for effect level:
- organ weights and organ / body weight ratios
- Fetal body weight changes:
- no effects observed
- Reduction in number of live offspring:
- no effects observed
- Changes in sex ratio:
- no effects observed
- Changes in litter size and weights:
- no effects observed
- Anogenital distance of all rodent fetuses:
- not examined
- Changes in postnatal survival:
- not examined
- External malformations:
- no effects observed
- Skeletal malformations:
- no effects observed
- Visceral malformations:
- no effects observed
- Details on embryotoxic / teratogenic effects:
- Mean fetal body weight of the dosed groups did not differ from that of the control. Examination of foetuses did not reveal any signs for substance related abnormalities.
All signs of embryo-/ fetotoxicity and substance-related teratogenicity, malformations recorded, appeared without a clear dose-response relationship, can be found in a similar frequency in the historical control data and/or the differences between the groups are without biological relevance. - Dose descriptor:
- NOAEL
- Remarks:
- teratogenicity
- Effect level:
- >= 20 mg/kg bw/day
- Based on:
- test mat.
- Sex:
- male/female
- Remarks on result:
- not determinable due to absence of adverse toxic effects
- Abnormalities:
- not specified
- Developmental effects observed:
- not specified
- Conclusions:
- From this study a NOAEL for maternal toxicity of 3 mg/kg bw/d and a NOAEL for embryo-/fetotoxicity of >= 20 mg/kg bw/d can be derived.
- Executive summary:
An OECD 414 guideline study (GLP, reliability 1)is available for the assessment of the developmental toxicity potential. In this study the test material was investigated for its prenatal toxicity in Wistar rats by the oral (gavage) route of administration. Groups of 22 - 24 pregnant rats had been treated with hydroxylammonium sulfate at dosages of 1, 3, 10, and 20 mg/kg bw on day 6 through day 15 post coitum. The test substance (purity > 98.4%) had been administered as an aqueous solution and at a standard dose volume of 5 ml/kg bw. The control group, consisting of 20 dams, was dosed with the vehicle (Milli-Q-water) only. Food consumption and body weights of the animals were recorded regularly throughout the study period. The state of health of the animals was checked each day. At sacrifice on day 20 post coitum dams were assessed by gross pathology (including weight determinations of the spleen), and numbers of corpora lutea and numbers and distributions of implantation sites were recorded. Foetuses were sexed, weighed and further investigated for any external, soft tissue and/or skeletal findings. In the dams an enlargement of the spleens and a dose related statistically significant increase in absolute and relative spleen weights was revealed at dosages of 10 and 20 mg/kg bw/d. No substance-related effects on dams were reported for the lower dose groups. There were no substance-related differences between the groups in conception rate, the mean number of corpora lutea and implantation sites or in the values calculated for the pre- and the postimplantation losses, the number of resorptions and of viable foetuses. Mean fetal body weight of the dosed groups did not differ from that of the control. Examination of foetuses did not reveal any signs for substance related abnormalities. From this study a NOAEL for maternal toxicity of 3 mg/kg bw/d and a NOAEL for embryo-/fetotoxicity of >= 20 mg/kg bw/d can be derived.
Reference
Effect on developmental toxicity: via oral route
- Endpoint conclusion:
- no adverse effect observed
- Dose descriptor:
- NOAEL
- 20 mg/kg bw/day
- Study duration:
- subchronic
- Species:
- rat
- Quality of whole database:
- The quality of the whole database is high
Effect on developmental toxicity: via inhalation route
- Endpoint conclusion:
- no study available
Effect on developmental toxicity: via dermal route
- Endpoint conclusion:
- no study available
Justification for classification or non-classification
Classification, Labelling, and Packaging Regulation (EC) No. 1272/2008
The available studies are reliable and suitable for classification purposes under Regulation 1272/2008. No adverse effects on fertility or development were observed in a repeated dose study and no adverse effects were observed in a teratogenicity/developmental toxicity study in rats (OECD 414). As a result, the substance is not considered to be classified for fertility or developmental toxicity under Regulation (EC) No. 1272/2008, as amended for the seventeenth time in Regulation (EC) No. 2021/849.
Additional information
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Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.