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Diss Factsheets
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EC number: 201-058-1 | CAS number: 77-78-1
- 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
Flammability
Administrative data
Link to relevant study record(s)
Description of key information
Highly flammable: No (waiving)
Pyrophoric substance (A13): No (waiving)
Highly flammable solid (A10): No (waiving)
Highly flammable liquid (A9): No (see flash point 4.11)
Highly flammable gas (A11): No (waiving see discussion)
In contact with water substance liberates highly flammable gases (A12): No (waiving see discussion)
Flammable (A9): No
Key value for chemical safety assessment
- Flammability:
- non flammable
Additional information
Flammability, solid:
A test according to A.10 (flammability; solid) is not considered to be required, since the substance dimethyl sulfate is a liquid substance with a melting point of a range from -27 °C to -32°C and a boiling point of 188 °C, and therefore not a solid at room temperature (cf. Annex VII section 7.10 Column 2 of regulation (EC) 1907/2006).
Flammability, gases:
A test according to A.11 (flammability; gases) is not considered to be required, since the substance dimethyl sulfate is a liquid substance with a melting point of a range from -27 °C to -32°C and a boiling point of 188°C, and therefore not a gas at room temperature (c.f. Annex VII section 7.10 Column 2 of regulation (EC) 1907/2006).
Flammability in contact with water:
DMS hydrolyses very fast in water (DT50 <1d) to monomethyl sulfate and methanol whereas methanol is known to be highly flammable (H225; flash point of 11°C (IUCLID 4 dataset 2000)), the development of highly flammable gases of methanol (≥ 1L/kg per h) is impossible due to the high solubility of methanol in water and the resulting low “Henry`s law constant” of 0.41 Pa m3/mol. Therefore, DMS could be regarded as not flammable in contact with water and must not be classified as such. Furthermore, experience in handling shows that the substance does not ignite in contact with water.
Pyrophoric properties:
It is stated by the manufacture and confirmed by the costumers of the product that the substance DMS is a transported isolated intermediate which is only produced and used in strictly closed containers/apparatus in the manner described in Article 18(4) a-f of the regulation (EC) 1907/2006. Therefore, testing of pyrophoric properties (EC A.13) is not necessary (c.f Annex XI section 3.2 (b)). For confirmation of Article 18 (4) a-f please refer to section 13 of this technical dossier.
It is assumed that DMS hydrolyses under reaction with the humidity in air to monomethyl sulfate and methanol. Methanol is known to be highly flammable (H225; flash point of 11°C) with a self-ignition temperature of approx. 385 °C and a lower explosive limit of approx. 5.5 Vol % (IUCLID 4 dataset 2000). Methanol is highly soluble in water (106 mg/L at approx. 20°C) and low volatile (“Henry`s law constant” of 0.41 Pa m3/mol), hence, DMS could be regarded as not flammable in contact with air and must not be classified as such.
Justification for classification or non-classification
According to regulation (EC) 1272/2008 DMS should not be classified as flammable.
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.
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