Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 220-329-5 | CAS number: 2720-73-2
- 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
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: inherent biodegradability
- Type of information:
- other: published data
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
- GLP compliance:
- not specified
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, adapted
- Details on inoculum:
- The inoculum used was activated sludge from a semi-continuous colony maintained in the laboratory.
Incubation was carried out at 25°C in 200 ml Erlenmeyer flasks containing 5 ul of a alcohol and 100 ml of culture medium.
Biodegradation rate constant was determined by measurement ofthe alcohol concentration in the supernatant of the culture
by gas chromatography. - Duration of test (contact time):
- 28 d
- Initial conc.:
- 20 mg/L
- Based on:
- test mat.
- Reference substance:
- not specified
- Value:
- 98
- Sampling time:
- 12 d
- Value:
- 30
- Sampling time:
- 3 h
- Value:
- 75
- Sampling time:
- 5 d
- Details on results:
- The IUCLID datasheet describes an aerobic biodegradation test for potassium isobutyl xanthate following the OECD Guide-line 302B “Inherent biodegradability: Modified Zahn-Wellens Test”. The results showed degradation of 98% after 12 days, with approximately 30% after 3 h and 75% after 5 days.
These results suggest that potassium isobutyl xanthate will be inherently biodegradable and it is not expected to persist in the environment. - Validity criteria fulfilled:
- not specified
- Interpretation of results:
- inherently biodegradable
- Conclusions:
- - The Potassium amyl xanthate (CAS No. 2720-73-2), the subject of this dossier) is expected to exhibit very similar toxicity to Potassium isobutyl xanthate (CAS No.13001-46-2), which is also xanthate compound. Comparable metabolism would occur. The IUCLID datasheet describes an aerobic biodegradation test for potassium isobutyl xanthate following the OECD Guide-line 302B “Inherent biodegradability: Modified Zahn-Wellens Test”. The results showed degradation of 98% after 12 days, with approximately 30% after 3 h and 75% after 5 days. These results suggest that potassium isobutyl xanthate will be inherently biodegradable and it is not expected to persist in the environment.
- Executive summary:
- The Potassium amyl xanthate (CAS No. 2720 -73 -2), the subject of this dossier) is expected to exhibit very similar toxicity to Potassium isobutyl xanthate (CAS No.13001-46-2), which is also xanthate compound. Comparable metabolism would occur. The IUCLID datasheet describes an aerobic biodegradation test for potassium isobutyl xanthate following the OECD Guide-line 302B “Inherent biodegradability: Modified Zahn-Wellens Test”. The results showed degradation of 98% after 12 days, with approximately 30% after 3 h and 75% after 5 days.
These results suggest that potassium isobutyl xanthate will be inherently biodegradable and it is not expected to persist in the environment.
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- other: published data
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Justification for type of information:
- Potassium amyl xanthate readily decomposes to carbon disulphide, especially in the presence of moisture/water. Therefore, the Biodegradation in water of carbon disulphide (CS2) need to be considered in the assessment of potassium amyl xanthate. Well Study performed.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Deviations:
- yes
- Remarks:
- activated sludge was used as an inoculum
- GLP compliance:
- yes
- Remarks:
- Laboratories Arnhem CRL F92145 T92-03-04
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- The activated sludge was preconditioned to reduce the endogenous respiration rates. To this end the sludge (200 mgdry weight) was aerated for one week. The sludge was diluted to a concentration of 2 mg dry weight/l in the bottles.
- Duration of test (contact time):
- 28 d
- Initial conc.:
- ca. 5 mg/L
- Based on:
- DOC
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- study was conducted according to OECD no 301 D guideline with a slight modification, described under details of inoculum
- Reference substance:
- acetic acid, sodium salt
- Parameter:
- % degradation (DOC removal)
- Value:
- > 80
- Sampling time:
- 1 wk
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The biodegradation of CS2 was >80 % after 28 days of exposure, therefore CS2 is readily biodegradable.
Potassium amyl xanthate readily decomposes to carbon disulphide, especially in the presence of moisture/water. Therefore, the Biodegradation in water of carbon disulphide (CS2) need to be considered in the assessment of potassium amyl xanthate.
These results suggest that potassium amyl xanthate will be readily biodegradable and it is not expected to persist in the environment. - Executive summary:
The biodegradation of CS2 was >80 % after 28 days of exposure, therefore CS2 is readily biodegradable.
Potassium amyl xanthate readily decomposes to carbon disulphide, especially in the presence of moisture/water.
Therefore, the Biodegradation in water of carbon disulphide (CS2) need to be considered in the assessment of potassium amyl xanthate.
These results suggest that potassium amyl xanthate will be readily biodegradable and it is not expected to persist in the environment.
- Endpoint:
- biodegradation in water: ready biodegradability
- Data waiving:
- other justification
- Justification for data waiving:
- other:
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- other: published data
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Justification for type of information:
- Purity of test material not specified. 1-pentyl alcohol (Amyl alcohol) is both reagents used in the manufacture, as well as decomposition products of xanthates. Therefore, the Biodegradation in water of 1-pentyl alcohol (Amyl alcohol) need to be considered in the assessment of potassium amyl xanthate.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Principles of method if other than guideline:
- Standard methodology, which is similar to OECD Guideline 301D . These tests measured consumption of oxygen (biochemical oxygen demand, BOD) in vessels containing test substance, non-adapted inoculum from domestic sewage treatment plants, and test media prepared according to APHA guidelines.
- GLP compliance:
- no
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure):sewage, domestic, non-adapted
Microbial cultures were grown in medium in 1L or 2 L flasks maintained on a rotary shaker at 25 degree C for 48 hr.
Cells were collected by centrifuge, washed in 0.10M phosphate buffer (pH 7.1), and resuspended in the same buffer.
Warburg flasks contained 1.0 ml of sewage cell suspension, 100 umoles of phosphate buffer (pH 7.1) and 3.0 umoles of substrate. Additional tests with glucose were conducted to assess toxicity of test substance to the inoculum.
Oxygen uptake was measured at 30 degree C. - Duration of test (contact time):
- ca. 30 d
- Initial conc.:
- ca. 2.9 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Reference substance:
- other: glucose, 2 mg/l
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 34
- Sampling time:
- 2 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 52
- Sampling time:
- 5 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 62
- Sampling time:
- 10 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 52
- Sampling time:
- 30 d
- Details on results:
- A 30-day aerobic test with 1-pentyl alcohol and reported 34% biooxidation by day 2, 52% by day 5, 62% by day 10, and 52% by day 30.
- Parameter:
- BOD5
- Value:
- 4.1 mg O2/g test mat.
- Results with reference substance:
- The concentration of oxygen consumed in suspensions exposed to 1-pentyl alcohol was 2.7 mg/l, 4.1 mg/l, 4.9 mg/l, and 4.1 mg/l for days 2, 5, 10, and 30, respectively.
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Since the degradation exceeded 62% within 10 days, the substance meets the criteria for classification as readily biodegradable.
The biodegradation of 1-pentyl alcohol (Amyl alcohol) was >62 % after 10 days of exposure, therefore 1-pentyl alcohol (Amyl alcohol) is readily biodegradable. Potassium amyl xanthate readily decomposes to Amyl Alcohol, especially in the presence of moisture/water. Amyl Alcohol is both reagents used in the manufacture, as well as decomposition products.
Therefore, the Biodegradation in water of Amyl Alcohol need to be considered in the assessment of potassium amyl xanthate. These results suggest that potassium amyl xanthate will be readily biodegradable and it is not expected to persist in the environment. - Executive summary:
In this study, Dias and Alexander (1971) conducted a 30-day aerobic test with 1-pentyl alcohol and reported 34% biooxidation by day 2, 52% by day 5, 62% by day 10, and 52% by day 30. In the same study, the authors measured the biooxidation of 2-methyl butyl alcohol, which was measured at 48, 62, 74, and 52% after 2, 5, 10, and 30 days, respectively. Values for both alcohols were corrected for oxygen consumption in bottles with no test substance present, which accounted for the lower rate on day 30.
Results synopsis
BOD2=34%,
BOD5=52%,
BOD10=62%
BOD30=52%
Referenceopen allclose all
This study shows that CS2 is readily biodegradable.
The concentration of oxygen consumed in suspensions exposed to 1-pentyl alcohol was 2.7 mg/l, 4.1 mg/l, 4.9 mg/l, and 4.1 mg/l for days 2, 5, 10, and 30, respectively
Description of key information
When water is added to Potassium amyl xanthate it reacts with water to form the others substances: alcohol, potassium carbonate, trithiocarbonate and carbon disulphide.
Carbon disulphide (CAS number 75–15–0) it is the major decomposition product, which is liquid and have to be considered.
The biodegradation of CS2 was >80 % after 28 days of exposure, therefore CS2 is readily biodegradable. Potassium amyl xanthate readily decomposes to carbon disulphide, especially in the presence of moisture/water.
Therefore, the Biodegradation in water of carbon disulphide (CS2) need to be considered in the assessment of potassium amyl xanthate.
The biodegradation of 1-pentyl alcohol (Amyl alcohol) was >62 % after 10 days of exposure, therefore 1-pentyl alcohol (Amyl alcohol) is readily biodegradable. Potassium amyl xanthate readily decomposes to Amyl Alcohol, especially in the presence of moisture/water. Amyl Alcohol is both reagents used in the manufacture, as well as decomposition products.
Therefore, the Biodegradation in water of Amyl Alcohol need to be considered in the assessment of potassium amyl xanthate. These results suggest that potassium amyl xanthate will be readily biodegradable and it is not expected to persist in the environment.
These results suggest that potassium amyl xanthate will be readily biodegradable and it is not expected to persist in the environment.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
When water is added to Potassium amyl xanthate it reacts with water to form the others substances: alcohol, potassium carbonate, trithiocarbonate and carbon disulphide.
Carbon disulphide (CAS number 75–15–0) it is the major decomposition product, which is liquid and have to be considered.
The biodegradation of CS2 was >80 % after 28 days of exposure, therefore CS2 is readily biodegradable. Potassium amyl xanthate readily decomposes to carbon disulphide, especially in the presence of moisture/water.
Therefore, the Biodegradation in water of carbon disulphide (CS2) need to be considered in the assessment of potassium amyl xanthate.
The biodegradation of 1-pentyl alcohol (Amyl alcohol) was >62 % after 10 days of exposure, therefore 1-pentyl alcohol (Amyl alcohol) is readily biodegradable. Potassium amyl xanthate readily decomposes to Amyl Alcohol, especially in the presence of moisture/water. Amyl Alcohol is both reagents used in the manufacture, as well as decomposition products.
Therefore, the Biodegradation in water of Amyl Alcohol need to be considered in the assessment of potassium amyl xanthate. These results suggest that potassium amyl xanthate will be readily biodegradable and it is not expected to persist in the environment.
These results suggest that potassium amyl xanthate will be readily biodegradable and it is not expected to persist in the environment.
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.
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.