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Diss Factsheets
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EC number: 204-482-5 | CAS number: 121-57-3
- 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
Description of key information
In a study according to OECD test guideline 407 in rats under GLP, the NOAEL of the test substance was determined to be 1000 mg/kg bw for both sexes.
Key value for chemical safety assessment
Repeated dose toxicity: via oral route - systemic effects
Endpoint conclusion
- Dose descriptor:
- NOAEL
- 1 000 mg/kg bw/day
- Study duration:
- subacute
- Species:
- rat
Additional information
In a GLP-study according to OECD test guideline 407, the registered substance was administered daily by oral gavage at dose levels of 63, 250 and 1000 mg/kg body mass (BM) / day to 5 male and 5 female Wistar rats each over a period of 28 days. Another 5 male and 5 female rats received the same volume of water as vehicle control. All liquids were administered to each animal at 4 ml / kg bw. During the in-life phase, all animals were monitored for fatalities, general clinical signs, detailed clinical signs, grip strength and reactivity to sensory stimuli (limb placing test). The bodyweight as well as group food and group water consumption were also recorded. At the end of the in-life phase, blood samples from all animals were collected to provide data on haematology, serum biochemistry and blood coagulation. All animals were sacrificed humanely immediately after bleeding and examined by gross necropsy. Organ mass was recorded, tissues and organs selected therein were preserved and processed histologically. A histopathological examination was conducted on samples from the high dose groups and the vehicle groups.
As, in summary, only very few mild systemic and local effects in test animals treated with the high dose were observed, which did not produce any pathological evidence of a local or systemic toxicity of the substance. Therefore, the NOAEL was considered to be 1000 mg/kg bw.
This result is supported by two chronic toxicity studies (in rats and mice) of the azo dye FD & C Yellow No. 5 (CAS 1934-21-0). This dye is rapidly and almost completely cleaved in the gut by the gut flora to sulfanilic acid, i.e. the regsitered substance, and a rest (see Section 7.12).
For both species, no toxicity was observed for concentration equivalent to at least 2500 mg/kg bodyweight applied for more than two years. Due to the metabolism of the test substance, these results strongly support the practically non-toxic behaviour of sulfanilic acid.
Taking in addittion the rapid excretion of sulfanilic acid mainly in its original form into account, it is concluded that sulfanilic acid is highly unlikely chronically toxic. Therefore and for animal welfare reasons, a sub-chronic toxicity study is considered to be not justified.
Justification for classification or non-classification
As the substance did not show any toxic effects for concentrations up to 1000 mg/kg bw in a repeated dose toxicity study, no classification is warranted.
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