Registration Dossier
Registration Dossier
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EC number: 223-888-3 | CAS number: 4109-96-0
- 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
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- 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
Flammability: extremely flammable gas
Key value for chemical safety assessment
- Flammability:
- extremely flammable liquified gas
Additional information
The flammability in air of dichlorosilane was determined using the "bomb" method in accordance with DIN EN 1839 test method and in compliance with ISO 17025 quality system. A 10 L spherical pressure vessel which was electrically heated was used for the tests at a temperature of 25°C. Under the condition of the study, the Lower Explosion Limit (LEL) of dichlorosilane was observed to be 2.8 mol.% (± 0.1 vol.%).
In available secondary sources to which reliability could not be assigned, LEL of 3.0% at 35°C and UEL of 10% at 65°C were reported for dichlorosilane. Similarly, LEL of 2.5% (V) and UEL of 80% (V) were reported for the substance.
As the registration substance is an extremely flammable gas, it is not appropriate to test for flammability in contact with water; nor is it necessary to classify the substance for this endpoint. Nevertheless, the related substance trichlorosilane is known to produce a flammable gas (hydrogen) in contact with water at a rate of gas of more than 10 l/ (kg min), determined in a test conducted according to UN Test Method N.5. It is therefore reasonable to conclude that in contact with water, dichlorosilane would also liberate hydrogen gas at a rapid rate.
Justification for classification or non-classification
The substance is classified as follows:
Classification and Labelling according to EC Regulation (No.) 1272/2008: Flam. Gas 1; H220 Extremely flammable gas.
Classification and Labelling according to Regulation (EC) No. 1272/2008: Liquefied gas; H280: Contains gas under pressure; may explode if heated
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