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Diss Factsheets
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EC number: 215-354-3 | CAS number: 1323-39-3
- 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
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Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- other: Weight of evidence
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Weight of Evidence (WoE) assessment based on structural analogues and hydrolysis products
- Justification for type of information:
- No data on the ecotoxicity are available for Stearic acid, monoester with propane-1,2-diol. The ecotoxicity of this substance is therefore assessed in a weight of evidence analysis based on existing data on similar compounds and hydrolysis products. See the attached report.
The environmental toxicity to algae is assessed based on existing data on:
- the group of fatty acid esters (C10-C18),
- the relevant hydrolysis products including the group of fatty acids and propane-diol. - Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Test data used in the weight of evidence analysis are results from studies performed according to standard guidelines.
- Test organisms (species):
- Raphidocelis subcapitata (previous names: Pseudokirchneriella subcapitata, Selenastrum capricornutum)
- Test type:
- static
- Water media type:
- freshwater
- Total exposure duration:
- 72 h
- Key result
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- 19 mg/L
- Remarks on result:
- other: It is to be noted that all short-term effect concentrations are above the estimated water solubility of 0.0062 mg/L at 25 °C
- Key result
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- 12.5 mg/L
- Remarks on result:
- other: It is to be noted that all short-term effect concentrations are above the estimated water solubility of 0.0062 mg/L at 25 °C
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- Based on a weight of evidence approach the substance is concluded to have a short-term toxicity (72h) to algae of EC50 = 19 mg/L and NOEC =12.5 mg/L
- Executive summary:
Data on this endpoint are not available for “Stearic acid, monoester with propane-1,2-diol”. The environmental toxicity of this UVCB substance is therefore assessed in the present weight of evidence analysis based on existing data on:
- the group of fatty acid esters (C10-C18),
- the relevant hydrolysis products including the group of fatty acids and propane-diol,
- QSAR predictions for main components (monoesters and diesters of propane-diols).
Hereby, a solid data set is available for deriving a conclusion on the environmental toxicity of the UVCB-substance.
As the substance is an UVCB-substance, and as expert assessments of substances with similar properties and structure in addition to assessments of the components in the substance and the hydrolysis products are considered the most valid method for the assessment of the environmental toxicity of the UVCB substance, an overall weight of evidence approach is used for the assessment.
Based on a weight of evidence approach the substance is concluded to have a toxicity to algae of EC50 = 19 mg/L and NOEC =12.5 mg/L
Reference
Description of key information
Test data on this endpoint are not available for “Stearic acid, monoester with propane-1,2-diol”. The short-term toxicity of this substance is therefore assessed on a weight of evidence analysis of the short-term toxicity of the components in the substance, their major metabolites, the substances used for the synthesis of the UVCB-substance.
The two main constituents of the UVCB substance are both monoester of propane-diol with octadecanoic acid (45-98%) and the monoester of propane-diol with palmitic acid (2-50%). Thus, the UVCB substance belongs to the group of fatty acid esters, and has a very similar structure to the well-known monoglycerides – the only exception being the lack of a OH-group on the C3-carbon in the propylene glycol. The UVCB substance is assessed to be metabolised in the same manner as the monoglycerides via the formation of the fatty acid and the propylene glycol.
“Stearic acid, monoester with propane-1,2-diol” is an UVCB substance. Data on short-term toxicity to fish, aquatic invertebrate and aquatic algae and cyanobacteria as well as data on inhibition of activated sludge respiration are not available for “Stearic acid, monoester with propane-1,2-diol”. The environmental toxicity of this UVCB substance was therefore assessed based on a weight of evidence analysis.
A large set of test data on environmental toxicity have been found for the group of fatty acid esters including substances of similar structure and for the hydrolysis products of the UVCB substance to constitute a basis for conclusion on short-term toxicity of the UVCB substance.
Using the Danish QSAR database for the main constituents, QSAR predictions of short-term toxicity have been used to support and complement the test data.
As a conservative approach, the conclusions in this weight-of-evidence approach are based on the results obtained during the studies leading to the highest toxicity i.e., the lowest EC/LC50 and NOEC values respectively, leading to the following value:
Short-term toxicity to algae: 72hr-EC50= 19 mg/L; 72hr-NOEC= 12.5 mg/L (study with 1,2,3-Propanetriol, homopolymer, decanoate (C12 fatty acid ester).
It is to be noted that the short-term effect concentrations are above the estimated water solubility of 0.0062 mg/L.
The available information comprises adequate, reliable studies from reference substances with similar structure and intrinsic properties. Weight-of-Evidence is justified based on common functional group, common precursors/breakdown products. The information from these independent sources is consistent and provides sufficient weight of evidence leading to an endpoint conclusion in accordance with Annex XI, 1.2, of Regulation (EC) No 1907/2006
Key value for chemical safety assessment
Additional information
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.
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