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EC number: 223-098-9 | CAS number: 3734-67-6
- 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
Description of key information
Additional information
Stability
Hydrolysis
The chemical Acid red 1 is expected to hydrolyze to acids extremely slowly at 25 degC and pH7 since it has hydrolysable functional group amides.
With the exception of a few halogenated acetamides, most amides hydrolyze to acids extremely slowly at 25 degC and pH7.
Biodegradation
Biodegradation in water: screening tests
In the key study, Jahir Alam Khan (2011) studied the biodegradation of Azo Dye by Moderately HalotolerantBacillus megaterium.
The standard inoculums (25 ml) was used to inoculate 225 ml mineral salts basal media in which 15 ml of the dye solution has been added after autoclaving. The inoculated media was then incubated in shaking incubator at 150 rpm. Percentage dye degradation was determined spectrophotometrically every alternate day for twenty days.
Percentage dye degradation by the isolatedBacillus megateriumwas found to be 64.89% in 20 days. Under the test conditions, we can conclude that Red 2G is inherently biodegradable
In a supporting studies by Lata Kumari et al. (2016), BHUSSp X2 microbial strain was isolated from contaminated sites of carpet cluster Bhadhoi. The bacteria were used for the decolourization of effluent from dying plants of the cluster in Uttar Pradesh, India.
Within 24 hours, upto 97 % decolourization could be achieved at pH 8, temperature 35 °C under static condition, and initial concentration of 200 mg/l.
Similarly, under shaking conditions (100 rpm), upto 45 % decolorization could be achieved at pH 8, temperature 35 °C within 24 hours and initial concentration of 200 mg/l. This is possibly due to reduced activity of azoreductase with increase dissolved oxygen level under shaking conditions.
It can be concluded that under the test conditions RED 2G was found to be inherently biodegradable.
Biodegradation in water and sediment: simulation tests
Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound Acid Red 1. Half-life period of Acid Red 1 in water is observed to be 60 days (1440 hrs.) while in sediment it is 541.667 days (13000 hrs). Based on these half-life values of Acid Red 1, it is concluded that the chemical is persistent in water and persistent in sediment
Biodegradation in soil:
EPI Suite has estimated that Acid Red 1 is expected to be found predominantly in soil and its persistence estimate is based on its transformation in this medium. Its half-life in soil, 120 days (720 hrs), does not exceeds the threshold as per Annex XIII of REACH but is borderline on the criteria of 120 days.
Therefore, Acid Red 1 is estimated to be not persistent in the soil environment.
Bioaccumulation
Bioaccumulation potential of the test chemical was estimated byBCFBAF v3.01 Program from EPISuite Version 4.1.
The estimated BCF value for the test chemical in fish was found to be 3.162 L/kg.
Based on the classification criterion for PBT, the test chemical was found to non- bioaccumulative. Transport and distributionAdsorption / desorption
The adsorption capacity of the test chemical in soil was estimated using KOCWIN Program (v2.00) from EPISuite version 4.1. The koc was estimated using MCI method. The estimated Koc value for the test chemical is 20970L/kg
The test chemical has a corrected log Koc of 4.32. Based on this value it is concluded that the test chemical has strong sorption to soil and sediment, negligible to slow migration potential to ground water.
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